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Advancement of thermoelectric performances through the dispersion of expanded graphene on p-type BiSbTe alloys Powder Metall. (IF 1.4) Pub Date : 2023-09-08 Eun-Ha Go, Rathinam Vasudevan, Babu Madavali, Peyala Dharmaiah, Min-Woo Shin, Sung Ho Song, Soon-Jik Hong
We demonstrated the systematic investigation of the graphene addition on the microstructural behaviour and concurrent thermoelectric properties of water-atomized p-type BiSbTe (BST)- based alloy us...
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Synthesis of Li1.3Al0.3Ti1.7(PO4)3-coated LiCoO2 cathode powder for all-solid-state lithium batteries Powder Metall. (IF 1.4) Pub Date : 2023-08-22 Ki-Sun Nam, Kangsanin Kim, Kyungsun Kim, Jon-Won Lee, Ji-Woong Moon, Haejin Hwang
In this study, water-based precursor solutions with citric acid as the chelating agent were prepared, and the effect of the pH of the precursor solutions on the morphology and microstructure of the...
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Development of TiCN-Co-Cr3C2-Si3N4-based cermets with improved hardness and toughness for cutting tool applications Powder Metall. (IF 1.4) Pub Date : 2023-08-07 Balasivanandha Prabu Shanmugavel, Sri Harini Senthil Kumar, Chellammal Nandhini Aruna, Madhi Varshini Ramesh
A TiCN-Co-Cr3C2-based cermet, with the addition of 5wt. % and 10wt. %Si3N4 and a reference sample without Si3N4 addition were prepared by the spark plasma sintering technique. The average hardness ...
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Grain refinement and coercivity enhancement of sintered Nd–Fe–B alloys by doping eutectic alloy (Nd0.75Pr0.25)70Cu30. Powder Metall. (IF 1.4) Pub Date : 2023-08-02 Van Dao Nguyen, Taek-soo Kim, Yee-Un Lee, Soon-jik Hong
A significant enhancement in the coercivity and grain refinement was revealed for the spark plasma sintered NdFeB magnets by doping eutectic alloy (Nd0.75Pr0.25)70Cu30 powders. The commercially ava...
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Processing parameter correlations in powder bed fusion additive manufacturing for Fe–Si soft magnetic materials through design of experiments Powder Metall. (IF 1.4) Pub Date : 2023-08-01 Myeongjun Ji, Hyun-Jun Shim, Jeong Hyun Kim, Yong-Seong Lee, Joon Phil Choi, Young-In Lee
Owing to its processing freedom, additive manufacturing has emerged as a promising material processing method for Fe–Si alloys. In this process, the melt pool fused by selective laser undergoes rap...
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High-speed manufacturing-driven strength-ductility improvement of H13 tool steel fabricated by selective laser melting Powder Metall. (IF 1.4) Pub Date : 2023-07-31 Yeon Woo Kim, Haeum Park, Young Seong Eom, Dong Gill Ahn, Kyung Tae Kim, Ji-hun Yu, Yoon Suk Choi, Jeong Min Park
H13 tool steel was additively manufactured by selective laser melting (SLM). The sample printed at a higher laser scan speed exhibited higher strength and ductility than those of the sample printed...
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Oxidative and abrasive wear of multiphase AlSi0.75TiMnFeCux (X = 0, 0.25, 0.5) high entropy alloy under non-lubricating reciprocating motion Powder Metall. (IF 1.4) Pub Date : 2023-07-27 Hansung Lee, Minsu Kim, Ashutosh Sharma, Byungmin Ahn
In this study, dry sliding wear of AlSi0.75TiMnFeCux (x = 0, 0.25, 0.5) high-entropy alloy (HEA) produced through mechanical alloying (MA) and spark plasma sintering (SPS) was studied. The microstr...
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Fabrication of tungsten oxide powder from WC–Co cemented carbide scraps by oxidation behaviour Powder Metall. (IF 1.4) Pub Date : 2023-07-26 Min Soo Park, Jong-Min Gwak, Kyeong-mi Jang, Gook-Hyun Ha
Tungsten contains cemented carbide and is an industrially important material. Tungsten oxide is also used as a hardmetal; thus, there is an increased demand for nanosized and highly purified produc...
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Improved corrosion properties of novel Fe-Cr-B based metamorphic alloy designed for thermal spray process by adding Nb and Mo Powder Metall. (IF 1.4) Pub Date : 2023-07-25 Yong-Hoon Cho, So-Yeon Park, Gi-Su Ham, Choongnyun Paul Kim, Sung-Cheol Park, Kee-Ahn Lee
In this study, new metamorphic alloy powder (M+) with an optimised composition of Fe-Cr-B-Mo-Nb appropriate for thermal spray process was developed by adding Mo and Nb, and the novel metamorphic al...
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CIP-FAST: assessing the production of complex geometry titanium components from powders by combining Cold Isostatic Pressing (CIP) and Field Assisted Sintering Technology (FAST) Powder Metall. (IF 1.4) Pub Date : 2023-07-20 S. J. Graham, Y. Azakli, J. Withey, M. Jackson
A novel, two-step, solid-state method to produce complex geometry titanium parts was investigated by combining Cold Isostatic Pressing (CIP) with Field Assisted Sintering Technology (FAST). Hydride...
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Microstructure and mechanical properties of Ti-Zr alloys fabricated by two-step spark plasma sintering from TiH2 and ZrH2 powders Powder Metall. (IF 1.4) Pub Date : 2023-07-17 Kunpot Banjongaxsorn, Anak Khantachawana, Chihiro Watanabe, Kasama Srirussamee, Katsuyoshi Kondoh
Ti is well-known for its high strength-to-weight ratio and biocompatibility. It can be alloyed with Zr to improve mechanical properties. Currently, Ti-Zr alloys can be fabricated by powder metallur...
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Fabrication of nickel-titanium-iron shape memory alloys by powder metallurgy route and analyses of their physical and mechanical behaviour Powder Metall. (IF 1.4) Pub Date : 2023-07-14 Jagadish Parida, Subash Chandra Mishra, Bharat C. G. Marupalli, Ajit Behera
In this research work, the effect of Fe additions on the phase evolution, microstructure, chemical composition, transformation behaviour and properties of Ni(50−X)Ti50FeX shape memory alloys has be...
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Wear properties of Fe-16Mn-10Al-5Ni-0.86C lightweight steel manufactured by laser powder bed fusion Powder Metall. (IF 1.4) Pub Date : 2023-07-12 Tae-Hoon Kang, Amol B. Kale, Han-Soo Kim, Kee-Ahn Lee
Microstructural characteristics and wear properties of Fe-16Mn-10Al-5Ni-0.86C lightweight steel (LWS) manufactured by laser powder bed fusion (LPBF) process were investigated and compared with conv...
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The effects of powder size and sintering temperature on the microstructure and properties of modified MA6000 alloy produced by spark plasma sintering Powder Metall. (IF 1.4) Pub Date : 2023-07-04 Dinh Van Cong, Dong-Wan Lee, Su-Gwan Lee, Jin-Woo Kim, Hwi-Jun Kim, Joong-Gyeong Lim, Tae-Shik Yoon, Jin-Chun Kim
The present study investigates the properties and microstructure evolution of MA 6000, a nickel-based alloy produced by mechanical alloying and spark plasma sintering (SPS), a powder processing tec...
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Morphology transformation of stainless steel 316L powder from spheres to flakes using high-energy ball milling and the investigation of transformation behaviour Powder Metall. (IF 1.4) Pub Date : 2023-07-04 Dong Hoon Lee, Seungheon Han, Man-Ho Park, Jung-Yeul Yun, Myeongjun Ji, Young-In Lee
Today, microfiltration plays the most significant role in removing fine particulate impurities in gas streams used in high-tech industries. However, the current SS316L gas filter has a limitation i...
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Powder metallurgy processing of Nb-modified near β titanium alloys prepared with elemental powders Powder Metall. (IF 1.4) Pub Date : 2023-06-26 Victor Carvalho Opini, João Batista Fogagnolo, Vicente Amigó Borrás, Rubens Caram, Juliano Soyama
Near β Ti alloys typically show high specific strength and provide a wide spectrum of mechanical properties with different heat treatments. In this work, a commercial near β Ti alloy Ti-5553 (Ti-5A...
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Influence of the initial powder characteristic on the densified tungsten microstructure by spark plasma sintering and hot isostatic pressing Powder Metall. (IF 1.4) Pub Date : 2023-06-23 Ji Young Kim, Eui Seon Lee, Youn Ji Heo, Young-In Lee, Jongmin Byun, Sung-Tag Oh
The effect of powder characteristics on the sintering behaviour and microstructure of densified W by spark plasma sintering and post-hot isostatic pressing was investigated. W powder was prepared b...
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Consolidation and properties of porous Cu–Al–Ni shape memory alloys manufactured by powder metallurgy Powder Metall. (IF 1.4) Pub Date : 2023-06-23 A. P. Gómez, G. Urretavizcaya, A. L. Baruj, M. T. Malachevsky
A method to manufacture a porous Cu–Al–Ni shape memory alloy by powder metallurgy using space holders is presented. Two aluminium powders with different particle morphologies were employed to inves...
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Correlation between the nanomechanical characteristic and the phase transformation of BCC-based high entropy alloys produced via powder metallurgy Powder Metall. (IF 1.4) Pub Date : 2023-06-21 Hansung Lee, Ashutosh Sharma, Minsu Kim, Byungmin Ahn
In this study, the effects of Cu addition on AlFeMnTiSi0.75Cux (x = 0, 0.25, 0.5, 0.75, 1.00; in molar ratios) high entropy alloys (HEAs) prepared via mechanical alloying and spark plasma sintering...
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Powder flowability characterisation at preheating temperature in additive manufacturing Powder Metall. (IF 1.4) Pub Date : 2023-06-20 Jiangtao Zhang, Peng Liu
The powder spreading process is usually performed at preheating temperature in powder-bed-based additive manufacturing (AM). Thus, the powder flowability characterisation at preheating temperature ...
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Effects of B addition on microstructure and thermal conductivity of Cu–B composites produced by hot-extrusion of elemental powders Powder Metall. (IF 1.4) Pub Date : 2023-06-18 Young-Bum Chun, SeungHyeok Chung, Chang-Kyu Rhee, Ho Jin Ryu
This work proposes a new neutron absorber, Cu–B composites, with excellent thermal conductivity and good neutron absorbing capability. Mixtures of elemental Cu and B powders with the B contents var...
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Surface morphology transformation and densification behaviour of conventionally sintered AlFeCoNiSi high entropy alloys Powder Metall. (IF 1.4) Pub Date : 2023-06-16 Sheetal Kumar Dewangan, Cheenepalli Nagarjuna, Hansung Lee, Ashutosh Sharma, Byungmin Ahn
A preliminary study has been performed to understand the effect of pressureless sintering on the surface morphology of the AlFeCoNi alloy by the addition of the Si element. This study aims to deter...
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Effects of process parameters on the spreading morphology of disc surface and aluminium powder produced by centrifugal atomisation Powder Metall. (IF 1.4) Pub Date : 2023-06-15 Long Li, Lei Peng, Wei Zhao
An apparatus was developed to study the effects of operating parameters on liquid spreading and particle size in centrifugal atomisation. Different areas of aluminium spreading on the surface of th...
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Miniaturised test-setup for Spark Plasma Sintering – experimental and numerical investigations Powder Metall. (IF 1.4) Pub Date : 2023-06-13 M. Nöthe, J. Trapp, A. S. Semenov, B. Kieback, T. Wallmersperger
Spark Plasma Sintering (SPS) is an innovative sintering technique, whereby many of the beneficial effects of this process on sintering are still elusive. To allow for the detailed investigations of...
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Mechanical and thermal expansion behaviour of TiC-reinforced CoCrFeMnNi high entropy alloy prepared by mechanical alloying and spark plasma sintering Powder Metall. (IF 1.4) Pub Date : 2023-06-06 Cheenepalli Nagarjuna, Sheetal Kumar Dewangan, Kwan Lee, Byungmin Ahn
In this study, TiC-reinforced CoCrFeMnNi high-entropy alloy (HEA) composites were prepared by mechanical alloying (MA) and spark plasma sintering (SPS). The phase composition, microstructure, mecha...
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Mold filling behaviour of LPIM feedstocks using numerical simulations and real-scale injections Powder Metall. (IF 1.4) Pub Date : 2023-06-02 Foad Haghniaz, Dorian Delbergue, Raphaël Côté, Vincent Demers
This study aims to compare the flow patterns and in-cavity pressures obtained experimentally and numerically for different conditions. Four feedstocks based on 17-4PH stainless steel powder were fu...
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Cracking susceptibility of maraging parts manufactured by laser powder bed fusion additive manufacturing: study on the powder characteristics and baseplate preheating influence Powder Metall. (IF 1.4) Pub Date : 2023-05-28 E. Gil, A. M. Mancisidor, A. Iturrioz, F. Garciandia, M. San Sebastian
Maraging steel 300 processed by laser powder bed fusion (PBF-LB/M) is widely used for manufacturing inserts and moulds with conformal cooling channels. For such applications, high fracture toughnes...
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Numerical analysis of droplet breakup, cooling, and solidification during gas atomisation Powder Metall. (IF 1.4) Pub Date : 2023-05-20 Gezhou Wang, Yuanbin Deng, Frank Adjei-Kyeremeh, Jiali Zhang, Iris Raffeis, Andreas Bührig-Polaczek, Anke Kaletsch, Christoph Broeckmann
As gas atomisation has been the main method for producing high-performance spherical powders in the past decades, its application in the production of metallic powders has become one of the main re...
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Effect of feedstock bimodal powder mixture and infiltration process on mechanical behaviour of binder jetting processed 316L stainless steel Powder Metall. (IF 1.4) Pub Date : 2023-05-17 Xuhao Liang, Xiaoyan Meng, Peishen Ni, Zhe Zhao, Xin Deng, Guanqiao Chen, Yongxuan Chen, Shidi Li, Shanghua Wu, Jinyang Liu, Zhi Qu, Feng Jin
Binder jetting additive manufacturing (BJAM) is a widely studied technique fabricating metal parts. In this study, bimodal 316L stainless steel powder mixture of coarse (D50 – 34.1μm) and fine (D50...
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Fabrication of tailored Ti6Al4V-based materials by conventional powder metallurgy for bone implant applications Powder Metall. (IF 1.4) Pub Date : 2023-05-11 L. Olmos, D. Bouvard, O. Jimenez, J. Chavez, R. Macías
ABSTRACT This works proposes a methodology for fabricating materials with specific characteristics mimicking human bones. A Ti64 alloy powder was used as the base material and it was mixed with Ag, Ta, TiN and salt particles to obtain different features. A hip-bone like component was fabricated, including a highly porous core of Ti64/25Ta/5Ag and a compact outer shell of Ti64/5Ag that is supposed to
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Synergetic effect of milling speed and duration on particle morphology and mechanical properties of nanocrystalline Al matrix containing SiC Powder Metall. (IF 1.4) Pub Date : 2023-05-08 K.C. Nayak, J.Y. Han, C.H. Jung, M.R. Joo, K.B. Lee, D.H. Bae, H.J. Choi
In the present study, the composite sheets were produced by powder rolling the ball-milled Al/SiC mixture. The effect of milling speed (350–550 rev min–1) and milling duration (8 and 12 h) on the A...
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Effects of processing conditions and fine powder loading on real and electroactive surface areas of porous nickel manufactured by lost carbonate sintering Powder Metall. (IF 1.4) Pub Date : 2023-04-24 Zejun Wang, Yuyuan Zhao
The effects of five key processing parameters on the real and electroactive surface areas of porous nickel samples produced by the Lost Carbonate Sintering (LCS) process have been investigated syst...
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Preparation of 24CrNiMoY alloy steel with high strength and toughness by selective laser melting Powder Metall. (IF 1.4) Pub Date : 2023-04-24 Miao Sun, Suiyuan Chen, Mingwei Wei, Jing Liang, Changsheng Liu, Mei Wang
24CrNiMoY alloy steel with high strength and toughness was prepared by selective laser melting (SLM) technology. The microstructure and mechanical properties of alloy steel samples prepared by SLM ...
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Study of microstructure and mechanical properties of 17-4 PH stainless steel produced via Binder Jetting Powder Metall. (IF 1.4) Pub Date : 2023-04-20 Lorena Emanuelli, Giacomo Segata, Matteo Perina, Martin Regolini, Valentina Nicchiotti, Alberto Molinari
The microstructure and mechanical properties of 17-4 stainless steel produced by Binder Jetting (BJT) and heat treated according to the standard conditions for the 17-4 PH steel (H900 and H1100) we...
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Microstructural evolution during sintering of Fe-Cr-C steels prepared from admixed elemental powders Powder Metall. (IF 1.4) Pub Date : 2023-04-19 Raquel de Oro Calderon, Christian Gierl-Mayer, Herbert Danninger
In the upcoming years, a reduction in the use of critical elements, such as Ni and Cu, with unstable prices and high demand from the electromobility sector will become increasingly important for th...
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Francisco ‘Paco’ Castro – obituary Powder Metall. (IF 1.4) Pub Date : 2023-04-17 Iñigo Iturriza
Published in Powder Metallurgy (Vol. 66, No. 4, 2023)
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Using discrete simulations of compaction and sintering to predict final part geometry Powder Metall. (IF 1.4) Pub Date : 2023-04-12 Gilmar Nogueira, Thierry Gervais, Véronique Peres, Estelle Marc, Christophe L. Martin
ABSTRACT A Discrete Element Method (DEM) model is used to simulate the compaction and sintering of ceramic oxides. The process kinematics is decomposed into loading, unloading and ejection of the pellet. Interactions between the particles are considered elastoplastic by implementing a model able to tackle large densities. A simplified approach is used in the sintering stage, which focuses on the final
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Interactions of polymeric components in a POM-based binder system for titanium metal injection moulding feedstocks Powder Metall. (IF 1.4) Pub Date : 2023-03-29 Keemi Lim, Muhammad Dilawer Hayat, Kumar Debajoyti Jena, Wen Zhang, Lu Li, Peng Cao
ABSTRACT Owing to the different characteristics of each of the multiple polymers, obtaining a homogenous metal injection moulding (MIM) feedstock blend is challenging. Therefore, studying interactions between the polymeric components is vital for achieving suitable MIM feedstocks. We report on the effects of different compatibilisers – EGMA and E40 – on the interactions in polyoxymethylene (POM) and
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Influence of iron nanopowder addition on the densification of chromium-prealloyed water-atomised powder metallurgy steel admixed with nickel Powder Metall. (IF 1.4) Pub Date : 2023-03-27 Swathi K. Manchili, Bala Malladi, M. Vattur Sundaram, E. Hryha, L. Nyborg
ABSTRACT High sintered density is desired for heavy-duty applications and there are different ways through which the sintered density can be improved. In the current study, nanopowder is blended to the conventionally used micrometre-sized water-atomised steel powder to evaluate its impact on sintering. Both the powder variants, without and with nanopowder, were subjected to thermogravimetry analysis
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Effect of layer thickness on spatter properties during laser powder bed fusion of Ti–6Al–4V Powder Metall. (IF 1.4) Pub Date : 2023-03-27 Camille Pauzon, Ahmad Raza, Imran Hanif, Sophie Dubiez-Le Goff, Johan Moverare, Eduard Hryha
ABSTRACT High layer thicknesses for laser powder bed fusion are promising for productivity increase. However, these are associated with increased process instability, spatter generation and powder degradation, crucial for alloys sensitive to oxygen. The effect of increasing layer thickness from 30 to 60 µm is studied focusing on Ti-6Al-4V spatter formation during LPBF and its characterisation, with
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Rheological characterisation of water atomised tool steel powders developed for laser powder bed fusion by supervised and unsupervised machine learning Powder Metall. (IF 1.4) Pub Date : 2023-03-20 Denis Mutel, Simon Gélinas, Carl Blais
ABSTRACT Metal powders developed for additive manufacturing processes need to achieve specific flow characteristics to be considered suitable. However, for the relationship between powder flow and the morphological characteristics of individual particles can be difficult to establish. In this context, artificial intelligence appears to be the perfect tool to clarify the imprecision surrounding this
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Nozzle clogging in vacuum induction melting gas atomisation: influence of gas pressure and melt orifice diameter coupling Powder Metall. (IF 1.4) Pub Date : 2023-03-16 Junfeng Wang, Min Xia, Jialun Wu, Changchun Ge
ABSTRACT The clogging problem of close-coupled nozzles in the vacuum induction melting gas atomisation (VIGA) process is studied by numerical simulation and industrial experiments. To understand the factors affecting lick back on the nozzle, volume of fluid (VOF) multiphase flow model simulation was adopted to visualise the motion of alloy melt around the outer wall of the delivery tube in the primary
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Influence of oxygen in the production chain of Cu–Ti-based metallic glasses via laser powder bed fusion Powder Metall. (IF 1.4) Pub Date : 2023-03-16 Erika Soares Barreto, Jan Wegner, Maximilian Frey, Stefan Kleszczynski, Ralf Busch, Volker Uhlenwinkel, Lutz Mädler, Nils Ellendt
ABSTRACT Laser powder bed fusion of metals (PBF-LB/M) is advantageous for manufacturing bulk metallic glasses with size and geometrical freedom. However, the oxygen uptake along the production chain can negatively impact the generation of high-quality, amorphous parts. In this context, Cu–Ti-based alloys were gas-atomised and additively manufactured using commercial- (CP) and high-purity (HP) feedstocks
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A study of the anisotropy of dimensional change in the compaction plane during sintering of low alloyed cold compacted steels Powder Metall. (IF 1.4) Pub Date : 2023-03-06 Onur Utku Uçak, Marco Zago, Juergen Voglhuber, Ilaria Cristofolini
ABSTRACT The anisotropy of dimensional change in compaction plane of rings made of three low alloyed steels was investigated as a function of green density and geometry. Increasing green density and (Dext–Dint)/H ratio, the anisotropy of both shrinkage and swelling increases. A correlation with springback during ejection of the rings from die cavity after cold compaction was found. The ratio between
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The application of the model equation method in the preparation of porous copper by using needlelike and spherical carbamide as a space holder Powder Metall. (IF 1.4) Pub Date : 2023-02-10 Xiao Jian, Li Xin, Cai Yunhe, Li Xingting, Lin Yongqiang, Xi Jintao
ABSTRACT The measurement and predictive functions of the model equation method in the preparation of porous copper were studied. Needlelike and spherical carbamide was used as a space holder with volume content between 10 and 80%. One step of heat treatment for green compacts was applied to fabricate porous copper. A criterion for determining the uniformity of external dimensions of porous copper was
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Solid-state processing of surplus aluminium alloy powders through a combination of field-assisted sintering technology and hot rolling Powder Metall. (IF 1.4) Pub Date : 2023-01-29 S. J. Graham, A. Patel, B. Fernandez Silva, W. Stott, G. J. Baxter, M. Roscher, M. Jackson
ABSTRACT Metal additive manufacturing techniques typically operate using powders with limited particle size ranges, but atomisation processes produce significant amounts of particles outside these ranges, resulting in an accumulation of out-of-size specification metal powders without a clear use case. Field-assisted sintering technology (FAST) can provide an alternative, solid-state processing route
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Comparison of methods for characterising the steel cleanness in powder metallurgical high-speed steels Powder Metall. (IF 1.4) Pub Date : 2023-01-29 M. Schickbichler, S. Ramesh Babu, M. Hafok, C. Turk, G. Schneeberger, A. Fölzer, S. K. Michelic
ABSTRACT Powder metallurgical (PM) steels are characterised by a very high cleanness level. Single mesoscopic inclusions can nevertheless induce material failure under the extreme exposed stresses in the final product. Extensive knowledge about the cleanness of these steels is therefore essential. Various methods for inclusion analyses are available, providing different information about the non-metallic
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On the 100th birthday of Prof. Dr.-Ing. habil. Dr.-Ing. E.h. Werner Schatt Powder Metall. (IF 1.4) Pub Date : 2023-01-18 Thomas Weißgärber, Herbert Danninger
Published in Powder Metallurgy (Vol. 66, No. 1, 2023)
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Influence of powder forging and heat treatment conditions on the properties of the cost-effective Ti-5Al-2.5Fe alloy Powder Metall. (IF 1.4) Pub Date : 2023-01-17 L. Bolzoni, M. Jia, F. Yang
ABSTRACT The Ti-5Al-2.5Fe alloy is a cheaper α+β Ti alloy with mechanical performance comparable to those of the Ti-6Al-4V alloy whose cost could be further reduced by producing it via powder metallurgy. In this study, the effect of the thermomechanical deformation temperature on the properties of the Ti-5Al-2.5Fe alloy produced from elemental powders was studied. Furthermore, the effect of the modification
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Investigation of mechanical and microstructure characteristics of Ti64-bagasse ash composite produced by the SPS process Powder Metall. (IF 1.4) Pub Date : 2023-01-06 Mahdi Mirzaaghaei, Fathallah Qods, Hossein Arabi, Mostafa Milani, Bagher Mohammad Sadeghi, Mohammad Sadegh Nourbakhsh
ABSTRACT The aim of this study was to investigate and fabricate a Ti64-bagasse ash (BA) composite using the spark plasma sintering (SPS) method. Accordingly, the samples were fabricated under partial densification. XRD analysis, optical and electron microscopy (SEM), hardness measurement, and bending test were used to study the phases formed, the morphology of powders, microstructure, and mechanical
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Microstructure and mechanical properties of Mg–Ni–Gd alloy synthesised by powder metallurgy Powder Metall. (IF 1.4) Pub Date : 2023-01-03 C. Ravikanth Reddy, K. Satya Prasad, B. Srinivasarao
ABSTRACT The hexagonal close-packed structure renders magnesium weak at room and high temperatures for structural applications despite its low density. Inducing thermally stable and coherent second phases would enhance/retain the strength of Mg-based alloys even at high temperatures. This paper aims to develop a high-strength Mg-based nanocomposite. A master alloy composed of Ni and Gd was cast and
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Effect of low energy milling processes on the magnetic properties of Fe–Ni–Co soft magnetic materials Powder Metall. (IF 1.4) Pub Date : 2022-12-29 I. I. López-López, J. J. Morales, J. Solis, J. Lemus, J. A. Verduzco
ABSTRACT This work reports the effect of micro strain of soft magnetic materials obtained by low-energy ball milling. It has been observed that the low energy of the ball milling changes the magnetic domain size, increasing magnetisation, remanence and magnetic permeability of the milled powders as ferromagnetic particles. It is due to the increase of linear defects and the increase of lattice strain
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ONEJOON GmbH and the Powder Metallurgy Community mourn the loss of our colleague Peter Vervoort Powder Metall. (IF 1.4) Pub Date : 2022-11-17 Tobias Koch, Hans Joachim Particke
Published in Powder Metallurgy (Vol. 66, No. 2, 2023)
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Microstructure evolution and mechanical property of powder metallurgy Ti6Al4V alloy with high oxygen concentrations Powder Metall. (IF 1.4) Pub Date : 2022-11-02 Yang Zhou, Fang Yang, Cunguang Chen, Zhimeng Guo
ABSTRACT High oxygen Ti6Al4V alloys are fabricated by vacuum sintering and hot rolling using hydrogenation-dehydrogenation Ti6Al4V powder and ZrO2 powder as raw materials. The complete dissolution of oxygen and zirconium atoms results in an increase in lattice constant and strength. As-rolled Ti64-ZrO2 sample exhibits a bimodal structure with a fine acicular α phase of around 1 μm. Ti64-0.75 ZrO2 alloy
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Influence of heat treatment and densification on the load capacity of sintered gears Powder Metall. (IF 1.4) Pub Date : 2022-10-28 Philipp Scholzen, Ali Rajaei, Jens Brimmers, Bengt Hallstedt, Thomas Bergs, Christoph Broeckmann
ABSTRACT The powder metallurgical manufacturing of gears offers a promising opportunity in terms of reducing the noise emission and increasing the power density. Sintered gears weigh less than conventional gears and potentially have a better noise-vibration-harshness behaviour, due to the remaining porosity. However, the potential of sintered gears for highly loaded applications is not fully utilised
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Impact of powder reusability on batch repeatability of Ti6Al4V ELI for PBF-LB industrial production Powder Metall. (IF 1.4) Pub Date : 2022-10-18 Laura Cordova, Cindy Sithole, Eric Macía Rodríguez, Ian Gibson, Mónica Campos
ABSTRACT In powder bed fusion laser beam (PBF-LB), powder reusability remains key to keeping cost-effectivity as well as sustainability. In this study, highly sensitive Ti6Al4V ELI powder typically used for medical and aerospace applications is studied. Powder properties of new and reused powders after 10 build cycles subjected to variations such as morphology, particle size distribution (PSD), chemical
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Development of powder bed fusion – laser beam process for AISI 4140, 4340 and 8620 low-alloy steel Powder Metall. (IF 1.4) Pub Date : 2022-10-17 William Hearn, Peter Harlin, Eduard Hryha
ABSTRACT This study focuses on process development and mechanical property evaluation of AISI 4140, 4340 and 8620 low-alloy steel produced by powder bed fusion – laser beam (PBF-LB). Process development found that increasing the build plate preheating temperature to 180°C improved processability, as it mitigated lack of fusion and cold cracking defects. Subsequent mechanical testing found that the
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Fritz Thümmler, Prof. Dr.-Ing. habil, 1924–2022 Powder Metall. (IF 1.4) Pub Date : 2022-10-06 Rainer Oberacker
Published in Powder Metallurgy (Vol. 65, No. 5, 2022)
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Study of mechanical and tribological properties of Ti–6Al–4V alloy fabricated by powder bed fusion laser beam Powder Metall. (IF 1.4) Pub Date : 2022-08-30 Xiaojie Shi, Peipei Lu, Xiu Ye, Shuai Ren, Yiyao Wang, Ziwen Xie, Yiqing Ma, Xiaojin Miao, Meiping Wu
ABSTRACT Powder bed fusion laser beam, as one of the most promising forming technologies, offers unmatched benefits over traditional processing, particularly in the production of Ti–6Al–4V. The influence of laser line energy density (LLED) on the forming surface, phase composition, micro-hardness, tensile characteristics and wear resistance of Ti–6Al–4V alloy were explored to disclose the evolution
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Finite element simulation of different deformation modes for powder hot forging Powder Metall. (IF 1.4) Pub Date : 2022-08-30 G. Bagliuk, S. Kyryliuk
ABSTRACT Comparative results of numerical simulation of the process of hot forging of porous preforms with an axial hole for two deformation schemes are presented: in a die with a flash groove on the inner surface of the forged workpiece cavity and in a closed die. A significant difference in the nature of the evolution of the distribution of deformations and density over the cross-section of the workpiece