-
Use of Electrochemical Noise for the Study of Corrosion by Passivated CUSTOM 450 and AM 350 Stainless Steels Metals (IF 2.9) Pub Date : 2024-03-16 Facundo Almeraya-Calderon, Miguel Villegas-Tovar, Erick Maldonado-Bandala, Maria Lara-Banda, Miguel Angel Baltazar-Zamora, Griselda Santiago-Hurtado, Demetrio Nieves-Mendoza, Luis Daimir Lopez-Leon, Jesus Manuel Jaquez-Muñoz, Francisco Estupiñán-López, Citlalli Gaona-Tiburcio
Precipitation-hardening stainless steels, like AM 350 and Custom 450, are extensively utilized in various aerospace applications. The latter steel is utilized for applications needing great strength and corrosion resistance. In contrast, the former steel has a good corrosion resistance and moderate strength. The purpose of this study was to analyze transient frequencies in the electrochemical noise
-
The Effects of Target Thicknesses and Backing Materials on a Ti-Cu Collision Weld Interface Using Laser Impact Welding Metals (IF 2.9) Pub Date : 2024-03-16 Mohammed Abdelmaola, Brian Thurston, Boyd Panton, Anupam Vivek, Glenn Daehn
This study demonstrates that the thickness of the target and its backing condition have a powerful effect on the development of a wave structure in impact welds. Conventional theories and experiments related to impact welds show that the impact angle and speed of the flyer have a controlling influence on the development of wave structure and jetting. These results imply that control of reflected stress
-
The Coupled Temperature Field Model of Difficult-to-Deform Mg Alloy Foil High-Efficiency Electro-Rolling and Experimental Study Metals (IF 2.9) Pub Date : 2024-03-17 Gengliang Liu, Jiaxuan Yang, Tianren Shan, Huaimei Li, Dianlong Wang, Lipo Yang
In response to the challenging difficult-to-deform of magnesium foils, a high-efficiency and high-precision electro-rolling temperature field coupled model is established. This model is designed to simulate the non-annealing electric rolling (NAER) process of Mg foils under conditions of high current density, rapid temperature rise rates, and large temperature gradients. Firstly, a coupled temperature
-
Improved Discharge Performance of AZ72-0.05La Alloy Anode via Refining Mg17Al12 Phase Metals (IF 2.9) Pub Date : 2024-03-17 Junqing Guo, Bo Wang, Shizhong An
The morphology of phases in magnesium alloys is vitally important for their performance. It is found that improved discharge performance is achieved in AZ72-0.05La alloy via a refining Mg17Al12 phase by means of hot rolling. Before rolling, as-cast AZ72-0.05La alloy has a relatively coarse and strip-like Mg17Al12 phase. After rolling, the Mg17Al12 phase becomes much finer, showing a granulated shape
-
Efficient Recovery of Lithium from Spent Lithium Ion Batteries Effluent by Solvent Extraction Using 2-Ethylhexyl Hydrogen {[Bis(2-Ethylhexyl) Amino]methyl} Phosphonate Acid Metals (IF 2.9) Pub Date : 2024-03-17 Xiaoqin Wang, Zhulin Zhou, Xuting Si, Youcai Lu, Qingchao Liu
In order to overcome the interface emulsification problem of TBP-FeCl3 systems and the instability of β-diketone systems in high-concentration alkaline medium, it is necessary to design and synthesize some new extractants. By introducing amino groups into a phosphorus extractant, a new 2-ethylhexyl hydrogen {[bis(2-ethylhexyl)amino]methyl} phosphonate acid (HA) extractant was synthesized. In this study
-
Effect of Hydrogen on Fatigue Life and Fracture Morphologies of TRIP-Aided Martensitic Steels with Added Nitrogen Metals (IF 2.9) Pub Date : 2024-03-17 Tomohiko Hojo, Akihiko Nagasaka, Junya Kobayashi, Yuki Shibayama, Eiji Akiyama
The effects of hydrogen on the tensile properties, fatigue life, and tensile and fatigue fracture morphologies of nitrogen-added ultrahigh-strength transformation-induced plasticity (TRIP)-aided martensitic (TM) steels were investigated. The total elongation and number of cycles to failure (Nf) of the hydrogen-charged TM steels decreased with the addition of nitrogen; in particular, adding 100 ppm
-
Fracture Behaviour of Aluminium Alloys under Coastal Environmental Conditions: A Review Metals (IF 2.9) Pub Date : 2024-03-15 Ibrahim Alqahtani, Andrew Starr, Muhammad Khan
Aluminium alloys have been integral to numerous engineering applications due to their favourable strength, weight, and corrosion resistance combination. However, the performance of these alloys in coastal environments is a critical concern, as the interplay between fracture toughness and fatigue crack growth rate under such conditions remains relatively unexplored. This comprehensive review addresses
-
Temperature-Dependent Young’s Modulus of TaC- and TiC-Strengthened Co-Re-Based Alloys Metals (IF 2.9) Pub Date : 2024-03-11 Torben Fiedler, Eugen Seif, Hans-Rainer Sinning, Joachim Rösler
The knowledge of Young’s modulus is important for a quantitative assessment of strengthening contributions in CoRe alloys, such as strengthening by carbides. In this work, the temperature-dependent Young‘s modulus of monocarbide-strengthened CoRe-based alloys is measured using the vibrating reed technique. In this method, a reed-shaped sample is excited electrostatically, and the eigenfrequencies are
-
Thermal Cracking and Friction Performance of Two Kinds of Compacted Graphite Iron Brake Discs under Intensive Braking Conditions Metals (IF 2.9) Pub Date : 2024-03-14 Zhuo Xu, Guiquan Wang, Yanxiang Li
The limited thermal conductivity of compacted graphite iron constrains its application in brake discs. The matrix plays a crucial role in balancing the thermal conductivity and mechanical performance of compacted graphite iron. Therefore, two kinds of compacted graphite brake discs with different ferrite proportions were utilized to investigate their thermal cracking and friction performance under
-
Elimination of Low-Angle Grain Boundary Networks in FeCrAl Alloys with the Electron Wind Force at a Low Temperature Metals (IF 2.9) Pub Date : 2024-03-14 Md Hafijur Rahman, Sarah Todaro, Luke Warner, Daudi Waryoba, Aman Haque
Low-angle grain boundaries (LAGBs) accommodate residual stress through the rearrangement and accumulation of dislocations during cold rolling. This study presents an electron wind force-based annealing approach to recover cold-rolling induced residual stress in FeCrAl alloy below 100 °C in 1 min. This is significantly lower than conventional thermal annealing, which typically requires temperatures
-
Orientation Relationship of Intergrowth Al2Fe and Al5Fe2 Intermetallics Determined by Single-Crystal X-ray Diffraction Metals (IF 2.9) Pub Date : 2024-03-15 Yibo Liu, Changzeng Fan, Bin Wen, Zhefeng Xu, Ruidong Fu, Lifeng Zhang
Although the Al2Fe phase has similar decagonal-like atomic arrangements as that of the orthorhombic Al5Fe2 phase, no evidence for intergrowth samples of Al2Fe and Al5Fe2 has been reported. In the present work, the co-existence of Al2Fe and Al5Fe2 phases has been discovered from the educts obtained with a nominal atomic ratio of Al:Fe of 2:1 by arc melting. First, single-crystal X-ray diffraction (SXRD)
-
Arc Quality Index Based on Three-Phase Cassie–Mayr Electric Arc Model of Electric Arc Furnace Metals (IF 2.9) Pub Date : 2024-03-15 Aljaž Blažič, Igor Škrjanc, Vito Logar
In steel recycling, the optimization of Electric Arc Furnaces (EAFs) is of central importance in order to increase efficiency and reduce costs. This study focuses on the optimization of electric arcs, which make a significant contribution to the energy consumption of EAFs. A three-phase equivalent circuit integrated with the Cassie–Mayr arc model is used to capture the nonlinear and dynamic characteristics
-
Laser Surface Transformation Hardening for Automotive Metals: Recent Progress Metals (IF 2.9) Pub Date : 2024-03-15 Mojtaba Karamimoghadam, Mohammad Rezayat, Mahmoud Moradi, Antonio Mateo, Giuseppe Casalino
This article discusses recent advancements in the Laser Surface Transformation Hardening (LSTH) process applied to industrial metals. It focuses on examining the microstructure of the metal surface layer and explores different methods of performing LSTH to evaluate mechanical and surface properties. The study also investigates the utilization of various industrial lasers and simulation software for
-
Effect of Deformation Degree on Microstructure and Properties of Ni-Based Alloy Forgings Metals (IF 2.9) Pub Date : 2024-03-15 Ruifeng Dong, Jian Li, Zishuai Chen, Wei Zhang, Xing Zhou
The primary objective of this paper is to investigate the influence of deformation degree on the microstructure and properties of a Ni-based superalloy. An upsetting experiment was conducted using a free-forging hammer to achieve a deformation degree ranging from 60% to 80%. The impact of the forging deformation degree on the hardness and high-temperature erosion performance was evaluated using the
-
Indentation of Commercial Pure Titanium Processed by Cold Rolling Metals (IF 2.9) Pub Date : 2024-03-13 Diaoyu Zhou, Jiasheng Yu, Yiwei Dong, Yalu Qin, Xinwei Hao
In this work, the effects of plastic deformation on the indentation behaviors of commercial pure titanium alloy were investigated. Titanium experienced various kinds of deformation by cold rolling processes, and the indentation behaviors were measured using microindentation. The results showed the most deformed sample experienced the largest indentation resistance and had the highest dislocation density
-
Effect of Al-Si Coating on the Interfacial Microstructure and Corrosion Resistance of Dissimilar Laser Al Alloy/22MnB5 Steel Joints Metals (IF 2.9) Pub Date : 2024-03-13 Lingqing Wu, Joao Pedro Oliveira, Jin Yang, Ming Xiao, Min Zheng, Wenhu Xu, Yixuan Zhao, Feifan Wang, Hua Zhang
This investigation employed different laser powers to conduct the laser welding–brazing process of 5052 aluminum alloy to both Al-Si coated and uncoated 22MnB5 steel. The flux-cored Zn-Al22 filler metal was employed during the procedure. The influence of Al-Si coatings on the microstructure and corrosion resistance of Al/Steel welded joints was investigated using microstructural characterization and
-
Effect of Oxygen on Static Recrystallization Behaviors of Biomedical Ti-Nb-Zr Alloys Metals (IF 2.9) Pub Date : 2024-03-14 Chan-Byeol Han, Dong-Geun Lee
Titanium alloys that are used in biomedical applications must possess biocompatibility and a low elastic modulus so that they protect host bone tissue without causing stress shielding. As the elastic modulus of beta Ti alloys is close to that of bone (10–30 GPa), these alloys are considered potential orthopedic implant materials. The elastic modulus of the single β-phase Ti-39Nb-6Zr (TNZ40) alloy is
-
Advances in Metal Casting Technology: A Review of State of the Art, Challenges and Trends—Part II: Technologies New and Revived Metals (IF 2.9) Pub Date : 2024-03-14 Dirk Lehmhus
The present text is the second part of an editorial written for a Special Issue entitled Advances in Metal Casting Technology [...]
-
Effect of Carbides on Thermos-Plastic and Crack Initiation and Expansion of High-Carbon Chromium-Bearing Steel Castings Metals (IF 2.9) Pub Date : 2024-03-14 Qian Feng, Yanan Zeng, Junguo Li, Yajun Wang, Guozhang Tang, Yitong Wang
The bearing steel’s high-temperature brittle zone (1250 °C–1100 °C), second brittle zone (1100 °C–950 °C), and low-temperature brittle zone (800 °C–600 °C) were determined by the reduction in area and true fracture toughness. The crack sensitivity was strongest at temperatures of 1200 °C, 1000 °C, and 600 °C, respectively. Various experimental and computational methods were used to establish the phase
-
Electrochemical Behavior of Carbon Steel ASTM A36 in Diluted Pregnant Leach Solutions from Electrowinning of Copper Metals (IF 2.9) Pub Date : 2024-03-13 Luis Cáceres, Alvaro Soliz, Felipe M. Galleguillos-Madrid
In Northern Chile, large amounts of highly corrosive solutions are currently generated in the process of cathode washing after completing the electrowinning or electrorefining process of copper. This study investigates the electrochemical behavior of ASTM A36 carbon steel in pregnant-leach-solution (PLS) wash water. Measurements of electrochemical impedance spectroscopy and linear sweep voltammetry
-
Study on the Process Window in Wire Arc Additive Manufacturing of a High Relative Density Aluminum Alloy Metals (IF 2.9) Pub Date : 2024-03-13 Yajun Wu, Zhanxin Li, Yuzhong Wang, Wenhua Guo, Bingheng Lu
In recent years, there has been a heightened focus on multiplex porosity due to its significant adverse impact on the mechanical properties of aluminum alloy components produced through wire arc additive manufacturing (WAAM). This study investigates the impacts of the process parameters and dimension parameters on the relative densities of WAAM 2219 aluminum alloy components by conducting experiments
-
Predictability of Different Machine Learning Approaches on the Fatigue Life of Additive-Manufactured Porous Titanium Structure Metals (IF 2.9) Pub Date : 2024-03-11 Shuailong Gao, Xuezheng Yue, Hao Wang
Due to their outstanding mechanical properties and biocompatibility, additively manufactured titanium porous structures are extensively utilized in the domain of medical metal implants. Implants frequently undergo cyclic loading, underscoring the significance of predicting their fatigue performance. Nevertheless, a fatigue life model tailored to additively manufactured titanium porous structures is
-
Improving the Formation and Quality of Weld Joints on Aluminium Alloys during TIG Welding Using Flux Backing Tape Metals (IF 2.9) Pub Date : 2024-03-11 Saidov Rustam Mannapovich, Kamel Touileb
This work aimed to compare the quality and properties of the welded joints of AMg6 aluminium alloy produced via conventional TIG welding with the properties of those produced with flux backing tape. This study focussed on the relative length of oxide inclusions (Δoi) and the amount of the excess root penetration (hroot) of the AMg6 alloy weld beads. The results show the influence of the thickness of
-
CO–H2 Gas-Based Reduction Behavior of Cr-Rich Electroplating Sludge Mixed with Iron Ore Powder Metals (IF 2.9) Pub Date : 2024-03-12 Jian Zhang, Zhiwei Peng, Lingyun Yi, Mingjun Rao
Cr-rich electroplating sludge (CRES) is a complicated solid waste with high contents of chromium and iron. It can be used as a main feed of the FINEX ironmaking process, which requires gas-based reduction before smelting reduction to produce molten iron with the proper addition of iron ore powder. In this study, the CO–H2 gas-based reduction behavior of CRES mixed with iron ore powder was evaluated
-
The Formation of Phytic Acid–Silane Films on Cold-Rolled Steel and Corrosion Resistance Metals (IF 2.9) Pub Date : 2024-03-12 Wanjiao Duan, Yunying Fan, Baipo Shu, Yichun Liu, Yi Wan, Rongguang Xiao, Jianxin Xu, Shan Qing, Qingtai Xiao
In this work, phytic acid (PA) and 3-mercaptopropyltrimethoxysilane (MPTS) underwent a condensation process to produce a phytic acid–silane (abbreviated PAS) passivation solution. Additionally, it was applied to the surface of cold-rolled steel to create a composite phytic acid–silane film. The functional groups of the passivation solution were analyzed by Fourier transform infrared spectroscopy (FT-IR)
-
The Engine Casing Machining Holes Repairing Based on Vibration Wire Feeding Metals (IF 2.9) Pub Date : 2024-03-11 Yunlong Pan, Sheng Gao, Haichao Li, Wentao Zhang, Yixuan Ma
The engine casing components operate in high-temperature and high-pressure environments. Process holes are drilled when defects occur. Welding is employed in the repair of process holes as a process for permanently joining materials. The traditional welding method relies on padding, which results in poor back formation of process holes. Additionally, the shape of the process holes imposes high requirements
-
Effect of Tempering Time on the Microstructure and Properties of Martensitic Stainless Steel Metals (IF 2.9) Pub Date : 2024-03-11 Wei Jiang, Dong Wu, Qinyi Zhang, Mingxuan Li, Wei Liu
Martensitic stainless steels (MSSs) have been widely used in the manufacture of turbine blades, surgical instruments, and cutting tools because of their hardness and corrosion resistance. The MSSs are usually tempered at a temperature no higher than 250 °C after quenching to avoid the decline in the hardness, strength, and corrosion resistance of the steels. However, some short-time thermal shocks
-
A Study of a Cryogenic CuAlMn Shape Memory Alloy Metals (IF 2.9) Pub Date : 2024-03-11 Adelaide Nespoli, Francesca Passaretti, Davide Ninarello, Marcella Pani, Cristina Artini, Francesca Ferro, Carlo Fanciulli
In extreme temperature environments, a newly emerging engineering application involves both the active and passive control of structures using cryogenic shape memory alloys, which are smart materials able to recover high deformation below the freezing point. With the objective of carrying out new advances in this area, the present work aims to investigate the Cu-7.5Al-13.5Mn (wt.%) shape memory alloy
-
First-Principles Investigation on the Adsorption and Diffusion of Oxygen at the B2(110)–O(001) Interface in Ti2AlNb Alloys Metals (IF 2.9) Pub Date : 2024-03-09 Ming Zhang, Hongping Xiang, Lin Xu, Aihan Feng, Shoujiang Qu, Daolun Chen
The adsorption and diffusion of oxygen at the B2(110)[1¯11]||O(001)[11¯0] interface in Ti2AlNb alloys were investigated via first-principles calculations. Only a 2.6% interfacial mismatch indicates that B2(110)–O(001) is basically a stable coherent interface. The calculated adsorption energies and diffusion energy barriers show that oxygen prefers to occupy the Ti-rich interstitial sites, and once
-
Effects of Ti and N Contents on the Characteristic Evolution and Thermal Stability of MC Carbonitrides Holding at 1250 °C in H13 Die Steel Metals (IF 2.9) Pub Date : 2024-03-10 Xiaolin Sun, Shengyong Gao, Wulin Shang, Qingyuan Zhong, Gaoyang Song, Shuo Zhao
The evolution of MC-type primary carbonitrides (M=V, Ti, Mo; C=C, N) in terms of morphology, quantity, size and composition was systematically investigated in commercial H13 die steels with different Ti and N contents during thermal holding at 1250 °C for 5 h to 15 h. Results showed that the mean size and quantity of carbonitrides in the four samples had decreased during thermal holding. However, the
-
Studying Plastic Deformation Mechanism in β-Ti-Nb Alloys by Molecular Dynamic Simulations Metals (IF 2.9) Pub Date : 2024-03-10 Hongbo Wang, Bowen Huang, Wangyu Hu, Jian Huang
Using molecular dynamics (MD) simulations, the transition of the plastic deformation mechanism of Ti-Nb alloys during the tensile process was studied, and the effects of temperature, Nb composition, and strain rate on the deformation mechanism were also investigated. The results show that the deformation process of Ti-Nb alloys involves defect formation, followed by twinning and ω-phase transition
-
Impact of Welding Parameters in the Porosity of a Dissimilar Welded Lap Joint of CP800-XPF1000 Steel Weldment by GMAW-P Metals (IF 2.9) Pub Date : 2024-03-06 Julio Cesar Garcia-Guerrero, Francisco Fernando Curiel-López, Víctor Hugo López-Morelos, Jose Jaime Taha-Tijerina, Teresita Jesus Sánchez-Cruz, Maria del Carmen Ramirez-Lopez, Eduardo Cortes-Carillo, Miguel Angel Quinones-Salinas
The use of the orthogonal array L4 allows a determination of the effect between the welding parameters peak current (Ip), background current (Ib) and frequency (f) on the porosities in a dissimilar welded lap joint of CP800 and XPF1000 steel weldment by the gas metal arc welding process with the transfer pulsed mode. According to the results, modifications in the welding parameters affect the heat
-
Properties of Fluorine-Free Steelmaking Flux Prepared Using Red Mud Metals (IF 2.9) Pub Date : 2024-03-08 Zheng Zhao, Yanling Zhang, Kan Yu
The basic oxygen steelmaking process is based on the CaO-FeO-SiO2 ternary slag system, characterized by a high melting point and low lime dissolution rate, often becoming one of the key factors limiting the efficiency of the converter. The bulk solid waste red mud, produced by the Bayer alumina process and rich in Fe2O3/Al2O3/Na2O, significantly reduces the melting point of the steelmaking slag system
-
Consequences of the Direct Reduction and Electric Steelmaking Grid Creation on the Italian Steel Sector Metals (IF 2.9) Pub Date : 2024-03-06 Gianluca Dall’Osto, Davide Mombelli, Carlo Mapelli
The consequences on the Italian steel sector following the conversion of the sole integrated steel plant and the establishment of a direct reduction/electric arc furnace (DR/EAF) grid in the period 2022–2050 were analyzed. Imported natural gas (pathway 0), green hydrogen (pathway 1) and biomethane (pathway 2) were studied as possible reducing gases to be exploited in the DR plant and to be introduced
-
Effect of Gating System Design on the Quality of Aluminum Alloy Castings Metals (IF 2.9) Pub Date : 2024-03-07 Marek Brůna, Marek Galcik, Richard Pastircak, Elena Kantorikova
In this paper, a naturally pressurized gating system has been designed to reduce the turbulence of the melt during casting. The influence of gate dimensions, foam filters, a trident gate and a vortex element were evaluated. Their effect on melt velocity, flow characteristics, number of oxides, casting properties and mechanical properties were observed. ProCAST Simulation software v.2023 and a water
-
Phase Equilibrium Study of Rare Earth Oxide–Fluoride Salt System: A Review Metals (IF 2.9) Pub Date : 2024-03-07 Quan Zhou, Jinfa Liao, Chunfa Liao, Baojun Zhao
The applications of rare earth metals and alloys are becoming increasingly widespread and there is a strong market demand. Currently, most of the production enterprises adopt the fluoride–oxide system for electrolytic preparation of rare earth metals and alloys. The solubility of rare earth oxides in molten salt directly affects the selection of operational parameters in the electrolysis process. When
-
Numerical Simulation and Experimental Verification of the Quenching Process for Ti Microalloying H13 Steel Used to Shield Machine Cutter Rings Metals (IF 2.9) Pub Date : 2024-03-07 Xingwang Feng, Yunxin Wang, Jinxin Han, Zhipeng Li, Likun Jiang, Bin Yang
Owing to the non-uniform distribution of chemical composition and temperature during the heat treatment process, the residual stress and deformation of the workpiece emerge as crucial factors requiring consideration in managing the service performance and lifespan of shield machine cutter rings crafted from H13 steel. Considering H13 steel with titanium microalloying as the research object for the
-
Exploring Resistance Spot Welding for Grade 2 Titanium Alloy: Experimental Investigation and Artificial Neural Network Modeling Metals (IF 2.9) Pub Date : 2024-03-06 Marwan T. Mezher, Diego Carou, Alejandro Pereira
The resistance spot welding (RSW) process is still widely used to weld panels and bodies, particularly in the automotive, railroad, and aerospace industries. The purpose of this research is to examine how RSW factors such as welding current, welding pressure, welding time, holding time, squeezing time, and pulse welding affect the shear force, micro-hardness, and failure mode of spot welded titanium
-
The Microstructure and Properties of Al–Mn–Cu–Zr Alloy after High-Energy Ball Milling and Hot-Press Sintering Metals (IF 2.9) Pub Date : 2024-03-06 Olga A. Yakovtseva, Andrey G. Mochugovskiy, Alexey S. Prosviryakov, Andrey I. Bazlov, Nadezhda B. Emelina, Anastasia V. Mikhaylovskaya
In the present research an Al–7.7%Mn–4.9%Zr–3.2%Cu (wt%) alloy was processed by mechanical alloying (MA) followed by hot press sintering. The microstructure, phase composition, and mechanical properties of the MA granules and sintered samples were investigated. The dissolution of Mn, Zr, and Cu with further precipitation of the Al6Mn phase were observed during high-energy ball milling. In the alloy
-
Fatigue and Impact Behavior of Friction Stir Processed Dual-Phase (DP600) Steel Sheets Metals (IF 2.9) Pub Date : 2024-03-04 Mumin Yilmaz, Imren Ozturk Yilmaz, Onur Saray
This study investigates the impact of friction stir processing (FSP) on the deformation behavior of 1.1 mm-thick DP600 steel sheets under both static and dynamic loading scenarios, with a focus on the automotive applications of the material. During the process, the large plastic shear strains imposed by FSP resulted in a maximum temperature of 915 °C, leading to a morphological transformation of the
-
Study of Electroless Nickel Plating on Super Duplex Stainless Steel for Lithium-Ion Battery Cases: Electrochemical Behaviour and Effects of Plating Time Metals (IF 2.9) Pub Date : 2024-03-05 Byung-Hyun Shin, Jinyong Park, Seongjun Kim, Jung-Woo Ok, Doo-In Kim, Jang-Hee Yoon
With increasing demand for Li-ion batteries, studies are focusing on enhancing battery performance and safety. However, studies on battery cases remain scarce. Herein, we propose the use of super duplex stainless steel SAF2507, which is a two-phase (austenite + ferrite) steel, for battery casings. Unlike conventional AISI304, SAF2507 maintains its corrosion resistance and strength at high temperatures
-
Advances in Understanding of Unit Operations in Non-Ferrous Extractive Metallurgy in 2023 Metals (IF 2.9) Pub Date : 2024-03-04 Srecko Stopic, Bernd Friedrich
Metallic materials play a vital role in the economic life of modern societies; hence, research contributions are sought on fresh developments that enhance our understanding of the fundamental aspects of the relationships between processing, properties, and microstructures. Disciplines in the metallurgical field ranging from processing, mechanical behavior, phase transitions, microstructural evolution
-
Suppression of Inhomogeneous Plastic Deformation in Medium-Carbon Tempered Martensite Steel Metals (IF 2.9) Pub Date : 2024-03-04 Hai Qiu, Rintaro Ueji, Tadanobu Inoue
The Lüders phenomenon is one type of inhomogeneous plastic deformation occurring in the elastic-to-plastic transition region, and it is an undesirable plastic deformation behavior. Although conventional measures based on the chemical composition design, plasticity processing principle, or utilization of composited microstructures are used to suppress this phenomenon in engineering, demerits are present
-
Application of the Theory of Critical Distance (TCD) to the Breakage of Cardboard Cutting Blades in Al7075 Alloy Metals (IF 2.9) Pub Date : 2024-03-03 Giulia Morettini, Luca Landi, Luca Burattini, Giulia Stornelli, Gianluca Foffi, Andrea Di Schino, Filippo Cianetti, Claudio Braccesi
The study presented in this paper was undertaken in response to two instances of unexpected blade breakage in the cutting blade used in a Carton Wrap machine (CW). Failure of the Al7075 alloy blade occurred at an indentation during typical operational loading conditions. Subsequent metallographic examinations of the fractured samples confirmed that both cases were attributed to fatigue failure. The
-
Physicochemical Conditions of Boron–Siliconizing of Molybdenum-Based Alloys in Chlorine and Fluorine Medium Metals (IF 2.9) Pub Date : 2024-03-03 Tetiana Loskutova, Michael Scheffler, Vitalii Ivanov, Inna Pohrebova, Yaroslav Kononenko, Maryna Bobina, Nadiia Kharchenko, Marian Bartoszuk, Ivan Pavlenko
The physicochemical conditions of the siliconizing and boron–siliconizing processes of molybdenum-based alloys in a closed reaction space in an environment of chlorine and fluorine at reduced pressure were studied. Theoretical calculations of the equilibrium composition of systems with the participation of silicon, boron, molybdenum, nitrogen, oxygen, chlorine, and fluorine were carried out, which
-
Modified Split Mandrel Method and Equipment to Improve the Fatigue Performance of Structural Components with Fastener Holes Metals (IF 2.9) Pub Date : 2024-03-03 Jordan Maximov, Galya Duncheva, Angel Anchev, Vladimir Dunchev, Petya Daskalova
Abstract: Fastener holes are among the most common natural stress concentrators in metal structures [...]
-
Low-Temperature Impact Fracture Behavior of Medium Manganese Steel with Bcc-fcc Duplex Microstructures Metals (IF 2.9) Pub Date : 2024-02-29 Yu Du, Xiuhua Gao, Xiaonan Wang, Hongyan Wu, Chao Sun, Guosheng Sun, Linxiu Du
Impact fracture behavior at low temperatures was investigated in medium manganese steel with bcc-fcc duplex microstructures. The impact energy was above 150 J (−80~20 °C) and the fractography showed dimples for inter-critical annealing at 630 °C (QHA) because of the high retained austenite stability and low martensite dislocation density. The impact energy was from 180 J (20 °C) to 60 J (−80 °C) and
-
Electrochemical Behavior of Niobium Oxide and Titanium Oxide in NaF–Na3AlF6 Molten Salt Metals (IF 2.9) Pub Date : 2024-03-01 Bo Zhang, Shuiqing Yu, Yudong Liang, Maofa Jiang
The Bayan Obo ore deposit is a world-renowned polymetallic coexistence mine that integrates important elements, such as rare earths, iron, niobium, and titanium. The chemical properties of niobium and titanium are similar, and the two often coexist in the Bayan Obo deposit as isomorphs, making them difficult to separate. Therefore, the separation of niobium and titanium is crucial for the efficient
-
Development and Performance Evaluation of a Mechanical Connection for Steel and Shape Memory Alloy Bars Metals (IF 2.9) Pub Date : 2024-03-02 Min-Kyu Song, Eunsoo Choi, Jong-Han Lee
Shape memory alloys (SMAs) demonstrate a shape memory effect and superelasticity that can provide recovery performance to structural members. In this study, a round SMA bar was designed to replace the conventional deformed steel bar, particularly within the plastic hinge section of structural members. To integrate the SMA bar and the existing steel bar, a mechanical coupler was proposed by utilizing
-
Heterogeneous Microstructure and Tensile Properties of an Austenitic Stainless Steel Metals (IF 2.9) Pub Date : 2024-02-29 Qingxin Chen, Haichao Wang, Zhanjiang Li, Jun Tian, Jianeng Huang, Pinqiang Dai
Stainless steel (SS) exhibits excellent ductility; however, its low strength hinders its practical applications. To achieve good synergy between strength and ductility, a heterogeneous structure was introduced into a newly developed nitrogen-alloyed low-nickel austenitic steel, QN1803. The received QN1803 was cold-rolled and annealed at 993 K for different durations, and the microstructural evolution
-
Applied Magnetic Field Increases Magnetic Anisotropy in HDDR-Processed Nd-Fe-B Alloy Metals (IF 2.9) Pub Date : 2024-03-01 Zachary P. Tener, Xubo Liu, Ikenna C. Nlebedim, Matthew J. Kramer, Michael A. McGuire, Michael S. Kesler
We investigate the effect of an applied magnetic field on the entire HDDR process using a customized reactor vessel and a warm-bore superconducting magnet. We analyzed the resulting properties produced at both a 0 applied field and a 2 Tesla applied field. We show that the application of a magnetic field throughout the HDDR process results in powders that exhibit a greater level of anisotropy compared
-
How Cracks Induced by Straining Influence the Tribological Properties of Mo Films Deposited on Polyimide Substrates Metals (IF 2.9) Pub Date : 2024-03-01 Edyta Kobierska, Megan J. Cordill, Robert Franz, Marisa Rebelo de Figueiredo
Thin film materials used in flexible electronics are deposited on polymer substrates and must withstand a variety of static and dynamic mechanical loading conditions to ensure adequate reliability of the device. Tribological loads are also among these loading conditions, and suitable characterization methods and strategies are required for analyzing friction and wear for a variety of tribological contact
-
Material Modeling in Multiphysics Simulation Metals (IF 2.9) Pub Date : 2024-03-01 Francesco De Bona, Francesco Mocera, Jelena Srnec Novak
Virtual prototyping techniques, generally based on numerical methods, are widely used in the process of designing an industrial product [...]
-
Influence of Nickel Content on the Formation of an Interaction Zone during Contact Melting of Titanium with Copper-Nickel Alloys Metals (IF 2.9) Pub Date : 2024-03-01 Victor Georgievich Shmorgun, Oleg Victorovich Slautin, Vitaliy Pavlovich Kulevich, Artem Igorevich Bogdanov, Leonid Moiseevich Gurevich, Aleksey Gennadevich Serov
The diffusion processes during the contact melting at the boundary of explosively welded VT1-0 titanium with CuNi19 (melchior) and CuNi45 (constantan) alloy composites were studied. Heat treatment of composites led to the formation of the interaction zone at the joint boundary. The interaction zone in VT1-0 + CuNi19 consists of TiCuNi and αTi + Ti2Cu(Ni) continuous layers as well as a mixture of TiNi(Cu)
-
A Fundamental Study on the Preparation of Sodium Tungstate from Wolframite via the Smelting Process Metals (IF 2.9) Pub Date : 2024-03-01 Liqiang Xu, Baojun Zhao
Tungsten is a high-value resource with a wide range of applications. The tungsten metal is produced via ammonium paratungstate, which is a multi-stage process including leaching, conversion, precipitation, calcination, and reduction. A short process to produce tungsten metal from the electrolysis of molten sodium tungstate has been demonstrated. However, sodium tungstate cannot be directly produced
-
Effects of Chemical Composition and Solidification Rate on the Solidification Behavior of High-Cr White Irons Metals (IF 2.9) Pub Date : 2024-02-27 Hee Young Son, In Yong Jung, Baig Gyu Choi, Jong Ho Shin, Chang Yong Jo, Je Hyun Lee
The effects of chemical composition and solidification rate on the solidification behavior of high-Cr white irons were investigated through directional solidification. Increasing the solidification rate in hypoeutectic alloys caused finer dendrite-arm spacing, as expected. The eutectic structure, which formed in the interdendritic region, was comprised of M7C3 and austenite; however, secondary dendrite
-
Advanced EIS-Based Sensor for Online Corrosion and Scaling Monitoring in Pipelines of Geothermal Power Plants Metals (IF 2.9) Pub Date : 2024-02-27 Lorena Freire, Ignacio Ezpeleta, Julio Sánchez, Rubén Castro
Corrosion and scaling in metal pipelines are the major issues in the exploitation of geothermal sources. Geothermal fluids are complex mixtures consisting of dissolved gases and high-salinity solutions. This creates very aggressive environments primarily due to the high concentrations of carbon dioxide (CO2), hydrogen sulfide (H2S), chlorides, and other chemical species. Besides, the high temperature
-
Microstructural Evolution in a 0.09% Niobium Low Carbon Steel during Controlled Hot Deformation Metals (IF 2.9) Pub Date : 2024-02-28 E. Pineda Martínez, E. J. Palmiere
A series of plane strain compression tests were carried out in order to simulate the thermomechanical controlled processing of a 0.09wt% Nb low carbon steel, in a scheme of multipass finish rolling at 950 °C with interpass times of 10 s. It was observed that after the first two finishing passes a remarkable grain refinement can be achieved, since the recrystallisation was fully suppressed and abundant
-
Effects of Passivation with Cu and W on the Corrosion Properties of Super Duplex Stainless Steel PRE 42 Metals (IF 2.9) Pub Date : 2024-02-28 Dohyung Kim, Seongjun Kim, Jinyong Park, Doo-In Kim, Byung-Hyun Shin, Jang-Hee Yoon
Carbon steel is subjected to several pretreatments to enable its use in highly corrosive environments, such as marine structures. However, its surface treatment is problematic owing to various processes, and these problems can be solved by replacing it with super duplex stainless steel (SDSS), which exhibits remarkable strength and corrosion resistance owing to its austenite and ferrite phases. EN
-
Galvanic Corrosion of E690 Offshore Platform Steel in a Simulated Marine Thermocline Metals (IF 2.9) Pub Date : 2024-02-29 Jiezhen Hu, Guodong Lin, Peichang Deng, Ziyun Li, Yuwan Tian
Marked changes in temperature, pH, dissolved oxygen (DO) content, and nutrient content typically occur in marine thermoclines, which are key factors that affect the corrosion of metals. Offshore platforms require marine metals to be exposed to deep-sea environments and thus increase their penetration into the marine thermocline. This study investigates the galvanic corrosion of E690 steel in a marine