In present investigation, an effective thermomechanical treatment (TMT) was developed to improve the mechanical properties of rolled 1100/7075 Al alloys laminated metal composite (LMC), with a great emphasis on the aging behavior of 7075Al. Microstructural evolution during different thermomechanical methods and their effect on mechanical behavior of Al/Al LMCs were studied. The result shows that superior

The work-hardening characteristic of nickel-based GH4141 superalloy was investigated using uniaxial compression tests with different cold deformations. Prior to compression, the solution treatment was optimized using the dissolving temperature of precipitations, the mean size of grains, and the microhardness of the samples. The typical true strain-stress curve included elastic deformation (ε ≤ 0.03)

The effects of temperature and load on fretting fatigue induced geometrically necessary dislocation (GND) distribution in titanium alloy are studied by electron back-scattered diffraction (EBSD) in this paper. Fretting fatigue experiments under different temperature and load in TC11 titanium alloy are carried out and samples with small cracks are obtained. With Hough-based EBSD, the misorientation

In this investigation, a Ni-rich NiTi alloy was in-situ deposited with different substrate heating temperatures and the evolution of crystallographic orientation, precipitation, phase transformation, and mechanical responses were evaluated. The experimental results indicated that with the increment of substrate heating temperature from 150 °C to 350 °C, the average B2 grain size and the high angle

The metallic component parts fabricated by wire arc additive manufacturing (WAAM) usually present columnar grain structures along the build direction showing anisotropy in both microstructure and mechanical response. In this work, a thin-walled sample is made by the WAAM method using Ti-6.5Al–1Mo–1V–2Zr-0.1B wires, where 0.1 wt% B element is added into the near-α titanium alloy. The microstructure

Sc alloying is usually carried out by adding a small amount of Sc in typical aluminum alloys to improve the mechanical properties, however, the effect of high-Sc content on the microstructure and properties of aluminum alloys is rarely concerned. To further understand the role of Sc alloying, several Al–Sc binary alloys with high-Sc content are designed and the relationship between the Sc content and

Additive manufacturing is a good alternative to conventional methods for the production of near net shape geometries with high geometric complexity shorter lead times, being a good option for the manufacturing of dies for die casting process. In this research, a novel hot-work tool steel for aluminum die casting applications manufactured by laser powder bed fusion was investigated. As-built and stress-relieved

Layered architectures have been applied to twinning-induced plasticity (TWIP) steel in terms of configuring multi-layered TWIP and martensitic steel (MLS) sheets to overcome the limitation of low yield strength. However, hydrogen embrittlement (HE) inevitably appears in materials used for high-strength purposes, with the interfacial layers presenting localization sites of hydrogen, thereby limiting

Shear band behaviour plays a critical role in toughening and failure of bulk metallic glasses (BMGs). However, due to instability in time and inhomogeneity in space, spatial–temporal evolutions of shear bands are difficult to be studied in the past decades. Using digital image correlation (DIC) and infrared thermal imaging (ITI) technologies, uniaxial quasi-static compressions for Zr41.2Ti13.8Ni10Cu12

It is widely stated that yield stress extraction from micro-compression testing can be unreliable due to factors such as pillar taper, pillar-punch misalignment and lateral displacement for example through discrete slip events. This study reports on how these factors can be eradicated when using digital image correlation based strain mapping. This approach is demonstrated through a conventional micropillar

The oxide metallurgy was employed in the fabrication of twin-roll strip casting low carbon steels. The quantitative dependences of the microstructure and mechanical properties on cooling parameters were revealed and emphatically investigated. After twin-roll strip casting, a two-step cooling route closed to the actual process was designed and the cooling rates exhibited great influences on the proportion

The nanomechanical properties of hardened 60NiTi were studied using nanoindentation. The hardened 60NiTi consists of two regions: the NiTi + Ni4Ti3 region, which is composed of a B2 NiTi matrix and nanoscale Ni4Ti3 precipitates, and the globular Ni3Ti precipitates. Blind nanoindentation was first performed on 60NiTi using a diamond Berkovich without differentiating the regions. The two regions were

Liquid metal embrittlement (LME) was observed in the laser lap welds of zinc-coated GEN3 steels. When line energy input ranged from 54 kJ/m to 60 kJ/m, the LME crack initiated from the weld edge at the faying interface, propagated along the growth direction of columnar grains and extended upwards along the weld centerline, exhibiting an inversed Y-shape. Multiple Fe–Zn phases such as α-Fe (Zn), Γ-Fe3Zn10

Fully dense powder metallurgy (PM) Ti–4Fe–0.2O–3Cu–0.4Si alloy was produced employing spark plasma sintering (SPS) and hot extrusion aiming to develop an inexpensive high strength dual-phase (α+β) Ti alloy. The microstructure consisted of globularized fine grain α phase dispersed in the β matrix having the sharp texture of <101¯0>//extrusion direction. The tensile strength of alloy (∼1060 MPa) is comparatively

A low density, high strength medium-Mn steel was processed to produce a bimodal duplex microstructure consisting of coarse grained γ-austenite with fine δ-ferrite grains decorating the γ-austenite boundaries. Using a combination of ex situ analysis and in situ neutron diffraction, the deformation mechanisms and lattice strains within each phase were identified for specimens undergoing uniaxial tension

Work hardening behaviour of the IN-617 alloy under tensile loading was studied in the solution treated, aged, and cold worked conditions at room temperature (RT) and 700 °C. Double logarithmic plots of the true stress and logarithmic plastic strain of this alloy displayed upward concave shape similar to those of other austenitic superalloys. Five different relationships between the true stress and

In this work, the defect-free dissimilar AM60/AZ31 Mg joint was obtained by friction stir welding (FSW). Tensile tests were employed under different stress states to investigate the tensile behavior of the joint. The joint microstructures before and after deformation were characterized via electron backscatter diffraction to reveal the relationship between the microstructure and the deformation and

The dissimilar AM60/AZ31 Mg alloys joints were obtained via friction stir welding (FSW). Then, the upper and lower surfaces of the FSW joint were remelted by using tungsten inert gas (TIG) welding. The macrostructures, microstructure evolution and mechanical properties of the two kinds of joints were investigated. The results indicated that there was a TIG weld zone in both the upper and lower parts

In situ multiaxial loading during neutron diffraction tests were undertaken on a low-alloyed Quenched and Partitioning (Q&P) Transformation Induced Plasticity (TRIP) Bainitic Ferrite (TBF) steel with dispersed austenite particles. The effect of stress triaxiality on the evolution of the deformation-induced martensite is investigated under uniaxial- and equibiaxial-tension as well as tension/compression

Microstructure evolution, dominated by the formation of deformation-induced α″ martensite during the 3-point bending of a metastable β Ti–10V–2Fe–3Al alloy containing 5% α, was observed in-situ using forward-scatter electron imaging and electron backscattering diffraction. α″ plates nucleated heterogeneously from {580}α″ habit planes at α-β interfaces and triggered the nucleation of additional α″ plates

Oxides dispersion strengthened ferritic steels with bimodal-grains prepared by powder metallurgy (PM) have excellent strength-ductility synergy. However, the strengthening oxides can hardly be introduced into coarse grains by traditional PM methods, which limits the overall strength. In this work, to further enhance the mechanical property of PM ferritic steel, the face centered cubic ε-Cu phase was

Simultaneous strength–ductility enhancement of a high-entropy alloy via cold rolling and annealing is difficult. Cold rolling and annealing were performed on an as-cast Fe35Co21Ni6Cr18Mn20 high entropy alloy (HEA), the microstructure showed single phase face centered cubic (fcc) solid solution without phase transformation and the grains were fully recrystallized accompanied by additional grain growth

The effect of the specimen size on the mechanical characteristics of material, a phenomenon commonly referred to as the “size effect”, becomes increasingly important at micron and sub-micron dimensions of the specimen. However, the majority of size effect studies on face-centered cubic (fcc) metals have focused on pure elements, where deformation is accomplished by dislocation glide. In this work,

The thermo-mechanical processing of Ti-alloys comprises several steps where complex deformation and temperature cycles are achieved. In this work, the static recrystallization behaviour of a Ti-17 alloy is investigated using ex-situ characterization and in-situ synchrotron radiation experiments aiming to understand the operating mechanisms and to establish the recrystallization kinetics. Hot compression

In this study, the changes in the microstructure, texture, and mechanical properties of the AZ31B magnesium alloy sheet after asymmetric rolling (ASR) in different shear deformations during each pass are reported. A high shear strain is induced along the sheet thickness when the velocity ratio of the upper and lower rollers is 1.8. In the case of the sheet processed via ASR in the reverse shear deformation

Deep learning was applied in sorting nanoindentation-induced acoustic emission events. The acoustic emission events were triggered by a plasticity onset and dislocations phenomena, observed on the electropolished W (100) sample during nanoindentation tests. The acoustic signal was recorded by a specialized sensor integrated into the nanoindenter tip. The signal was conditioned using analog/digital

The deformation behavior of face-centered cubic (FCC) phase in annealed samples at room temperature was directly observed by Transmission electron microscope (TEM). It is found that FCC phase has excellent capacity of plastic deformation. Under cold-rolling, the FCC/HCP (hexagonal close-packed) phase interface slides and rotates, leading to deviation from the semi-coherent orientation relationship

(Ti,Ta)(B,C)–(Ta,Ti)C composites were synthesized by reactive hot pressing using commercial TaB2 and TiC powders as starting materials. Reaction process and effects of TiC contents in the starting batches on microstructure and mechanical properties of the resultant composites were reported. Microstructure of the composites were refined due to reaction and solid solution coupling effect. A core-rim

Deformation behavior of nanoscale laser processed Al–Al2Cu eutectics at room temperature is characterized through in situ micro-pillar compression testing in a scanning transmission microscope. Interlamellar spacing of Al–Al2Cu eutectics varies from hundreds of nanometers to 20 nm. Three different sizes of micro-pillars are fabricated in order to study the deformation behaviors of single colony and

The inter-granular penetration inside CoCrMnFeNi high-entropy alloy (HEA) in the dissimilar brazing joint of 304 stainless steel and this HEA were regulated for the first time by using Ag72Cu as filler metal (FM) and by annealing HEA. The as-rolled HEAs were annealed at a series of temperatures for 1 h before brazing. The microstructural evolution and the penetration coefficients of the dissimilar

The formation of defects in hydrogen-charged pure α-iron deformed at room temperature at different tensile strain rates was investigated by variable-temperature positron annihilation lifetime spectroscopy to clarify the role of hydrogen-induced defects in driving the hydrogen embrittlement mechanism. A distinct strain-rate dependence of the hydrogen-related defects was observed and a clear difference

In present study, the potential of Niobium (Nb) to improve the mechanical properties of Quenched and Partitioning (Q&P) steels is investigated. To this purpose, the effect of the addition of Nb on the microstructure and mechanical properties of a Q&P steel was thoroughly analysed with special attention on the thermal stability of the retained austenite. The mechanical properties of the Nb Q&P steel

Dilute Al–Er-Sc-Zr-Si alloys strengthened by coherent Al3(Er,Sc,Zr)(L12) nanoprecipitates have excellent coarsening- and creep-resistance up to 400 °C. Herein, the effects of micro-additions of 0.25 at.% Mn and/or 0.10 at.% Mo to a dilute Al-0.08Zr-0.014Sc-0.008Er-0.09Si (at.%) alloy are investigated with respect to precipitate evolution and the resulting strengths after different aging treatments

The bendability of Mg–Gd binary alloy at room temperature is significantly improved through the pre-compression and subsequent annealing (PCA) process. The results show that the formed angle of PCA sample (36°) is more excellent compared with the as-extruded (AE) sample (115°) during three-point bending test, which is mainly attributed to the variation of deformation mechanisms in the tension region

This work investigates the role of a carbon nanophase on the local mechanical behavior of nano-carbon metal matrix composites (NCMCs) produced through an electrocharge-assisted process. Nanoindentation experiments on single crystal Al, Al 1350 parent alloys, and Al 1350 NCMCs revealed variable mechanical properties, caused by an interplay between microstructure and graphitic reinforcements. TEM and

Ti–10 wt% Mo–1 wt% B4C composites were fabricated using spark plasma sintering (SPS) technique to study the effect of sintering temperature and dwell time on their microstructure and mechanical properties. The composites were sintered at different temperature degrees (1150, 1300 and 1450 °C) with dwell time of 5 and 10 min under the external pressure of 50 MPa. The composites prepared in 10 min were

The Z-phase (CrVN) precipitation in a 9% Cr–3% Co martensitic steel during creep at 923 K and 948 K has been investigated with aim to establish the effect of temperature on the nucleation mechanism of these particles and their coarsening behavior. Ostwald ripening of VX carbonitrides strongly affects these processes. An increase in creep temperature significantly accelerates the transformation of the

The cellular sub-grain was widely reported as the main contributor to the high yield strength of selective laser melted stainless steels, but its underlying strengthening mechanism was still unclear. In this study, the high yield strength of selective laser melted 316L stainless steel was studied by manipulating the cellular sub-grain through various heat treatments. Although the cellular sub-grain

Hydrogen embrittlement (HE) is a crucial problem for many advanced high strength steels (AHSS) used in the automotive industry. To contribute to the microstructural understanding on the resistance against hydrogen embrittlement a complex phase (CP) steel and dual phase (DP) steel were investigated systematically in the present work. Both steels have the same tensile strength, but different microstructures

In this study, we achieved hetero-structuring of multi-phase (CuFe)100-xMnx (x = 15, 20, and 33 at%) medium-entropy alloys having excellent strength-ductility synergy by systematic investigation of microstructural and mechanical responses. The significant hetero-deformation-induced strengthening of the alloys is attributed to the high plastic incompatibility between Cu-rich and Fe-rich phases from

Friction stir processing was utilized for enhancing mechanical properties of a lightweight steel through development of fine grain structures with high austenite stability. Interestingly, an anomalous effect of grain refinement on yield stress was found which was justified considering the dominant strain accommodative mechanisms in the initial and processed microstructures.

This study examines a quenched and partitioned steel matrix composite, which was reinforced with 10 vol% Mg-PSZ and processed by Spark Plasma Sintering (SPS). The investigations focused specifically on the effect of solution annealing prior to Quenching and Partitioning (Q&P) treatment on the microstructure and the mechanical properties under compressive loading of the composite. The results revealed

In this research work, the 6111Al matrix composites reinforced by different content of in-situ ZrB2 particles were conducted to hot extrusion process to investigate the characteristics of microstructural and mechanical evolution during deformation. The results showed that coarse particle clusters were crushed to pieces and the distribution of ZrB2 particles has been modified significantly with assistance

The effects of roller temperature on the microstructure and mechanical properties of a 3xxx serie aluminum alloy sheet were studied. Three temperature settings, namely, traditional rolling with low roller temperature (LTR), high roller temperature (HTR), and differential temperature rolling (DTR): different temperature of upper and lower rollers, were performed. The results reveal that among the three

In order to improve the functional stability of Ti-50.8 at.% Ni alloy, repeated stretch-bending deformation (SBD), electric pulse (EP), and age-hardening were combined. Phase transformation behavior and superelastic properties of NiTi alloy subjected to different treatments were compared and analyzed in terms of average grain size, dislocation morphology, and nanoscaled Ni4Ti3 precipitates. The results

Combined role of microconstituents (particles, eutectic fraction and its morphology) on the damage accumulation of three as-cast Mg–Ca–Sn alloys having distinctive microstructural features is studied. Flow stress normalized with that of a solid solution alloy brought out the sole contribution of microconstituents to the deformation. For identifying the influence of microconstituents on strain hardening

In this study, four Fe–13Cr–4Al alloys with different Nb contents (0–1.5 wt%) were prepared by using vacuum induction melting, forging, hot rolling, and cold rolling. The effects of annealing temperature (600 °C–1100 °C) and the Nb contents on the microstructure, textures as well as tensile properties were investigated. The dispersion of fine Fe2Nb-type Laves phase particles was observed in the BCC

The effect of strain rate on flow behaviors of three beta Ti alloys with different beta phase stability was studied. The alloys were subjected to compression deformation at four strain rates ranging from 7 × 10−5 to 7 × 10−2 s−1 at room temperature. Microstructure evolution was characterized using laser scanning microscopy and electron backscattered diffraction methods. The effect of strain rate on

The secondary phase particles of La2O3 play a crucial role in the determination of the yield strength over MoLa alloys, but few work focuses on their intrinsic modulation of shape and size. Herein, a nanostructuring strategy of the secondary phase particles is proposed to enhance the mechanical performances of MoLa alloys, in which the shape and size effects of secondary phase particles have been discussed

The increase in casting slab thickness causes sharp increase in both the size and uneven distribution of brittle eutectic borides in high borated austenitic stainless steel, thus remarkably deteriorating the hot workability and the final room-temperature mechanical properties. Hence, it is undesirable to produce thick plates by rolling an extra-thick slab. Here it is reported that a specially designed

The effects of trace MoSi2 addition on the microstructure evolution, mechanical properties and fracture behavior of Ti–6Al–4V wall via cold metal transfer additive manufacturing (CMTAM) were investigated. After the addition of trace MoSi2 powder, trace (β-Ti, Mo) phases and SiO2 particles were obtained and partly prior-β→α’ phase transformation was suppressed. Compared with the as-built Ti–6Al–4V wall

2219 Al–Cu alloy transition rings with a diameter stretching 5 m require further enhancement to their comprehensive mechanical properties. However, currently applied warm rolling process can lead to an uneven grain structure, which notably causes the mechanical properties to become inferior in the radial direction. Thus, an axial cold-compression process (0–9%) was performed after warm rolling to improve

The evolutions of grain structure, microtexture and mechanical properties during bobbin friction stir welding of Mg-5.89 wt%Zn-0.61 wt%Zr alloy were investigated. The electron backscattered diffraction analyses revealed that the grain structure evolution was a complicated process dictated by continuous dynamic recrystallization but also involved geometrized effects of strain and {10–12} twinning. Local

Aluminium foam sandwich panels containing aluminium alloy sheets (‘AFS’) have been made available now in sizes up to a few square metres but an unresolved problem in production is how to cope with non-uniformities of the foam and the general lack of mechanical property data of AFS. We investigate large industrial AFS panels and test X-ray radiography as a method to identify weak points in the foam