Article
Chemistry, Multidisciplinary
Yong Zhou, Fuan Yan
Summary: The purpose of this study was to investigate the initiation mechanism of grain boundary dissolution (GBD) for carbon steels in acidic electrolytes containing NO2-. Both electrochemical and surface methods were used to explore the electrochemical behavior, surface microstructure, and composition of Q235 carbon steel in a HNO3-NaNO2 solution with pH 4. It was found that GBD occurred at the high Si-Mn grain boundaries when Q235 carbon steel was polarized to the active-passive transition potential. The grain boundary segregations of Si and Mn played a critical role in the initiation of GBD.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2023)
Article
Materials Science, Multidisciplinary
D. F. Shi, Z. J. Zhang, Y. H. Yang, Y. Z. Zhou, R. Liu, P. Zhang, Z. F. Zhang
Summary: Nickel-based single-crystal superalloys are widely used in manufacturing aeroengine turbine vanes due to their excellent high-temperature performance. However, the presence of low-angle grain boundaries (LAGBs) during their manufacture can weaken the mechanical properties of the superalloys. In this study, the relationship between grain boundary misorientation (GBM) and fatigue properties of superalloys at elevated temperatures was systematically investigated using six different bicrystals with varying tilt LAGBs. The study found that an increase in GBM led to an increase in GB precipitates and cast micropores, resulting in a decrease in fatigue life and fatigue strength. The study also established a quantitative fatigue strength prediction model and evaluated the coupling effect of cast micropores and GBM on the fatigue damage mechanisms of the bicrystals.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Engineering, Mechanical
Qiang Wang, Xishu Wang, Naiqiang Zhang
Summary: Experimental results indicate that Inconel 617 is not sensitive to artificial notches, even with a curvature of approximately a hundred microns, and is more prone to intergranular fracture at high temperatures. Multiple crack initiation and propagation behaviors were observed, with increasing temperatures leading to more crack initiation sites. Intergranular cracking was found to be caused by the formation of coarsening and discrete M23C6-type carbides at grain boundaries, while twin boundary (TB) was identified as a crack initiation site that impeded crack propagation.
INTERNATIONAL JOURNAL OF FATIGUE
(2021)
Article
Materials Science, Multidisciplinary
Conghui Liu, Xu Xu, Tianzhu Sun, Rhys Thomas, Joao Quinta da Fonseca, Michael Preuss
Summary: The present study investigates the effects of microstructural constituents on crack initiation in two-phase titanium alloys. It was found that basal (a) slip plays a crucial role in crack initiation, regardless of cracking mode. Increasing ap fraction resulted in a shift from transgranular to intergranular crack initiation. The high-resolution 2D strain mapping revealed that intergranular cracks initiated from (0001) twist grain boundaries.
Article
Engineering, Mechanical
Yao Chen, Qi Shuai, Yujuan Wu, Liming Peng, Xiaohong Shao, Fulin Liu, Chao He, Lang Li, Yongjie Liu, Qingyuan Wang, Shaoxiong Xie, Qiang Chen
Summary: Hierarchical anisotropic nanostructured Mg-RE alloys with LPSO lamellae and dense nano-precipitates have superior mechanical properties, but their long-term reliability, especially in terms of fatigue, is still a concern. Scattered oxide nodules are found to be a special kind of fatigue damage that promotes crack initiation, instead of the typical slip-band structure. The LPSO lamellae and dense β′ nano-precipitates contribute to the localization of fatigue damage. Fatigue-induced oxide nodules form and grow within the soft α-Mg layer, but their growth is constrained by the adjacent strong LPSO lamellae, resulting in microcrack nucleation. Finally, clusters of microcracks along the LPSO/oxide interface converge to initiate transgranular cracking.
INTERNATIONAL JOURNAL OF FATIGUE
(2023)
Article
Engineering, Mechanical
Veronika Mazanova, Milan Heczko, Jaroslav Polak
Summary: Studies have shown that the mechanism of fatigue crack initiation in high-angle grain boundaries is controversial. In this research, experiments were conducted on super-austenitic stainless steel Sanicro 25 to study the surface features that developed during cyclic loading with high strain amplitudes. The results revealed the presence of slip markings on the surface of grains, as well as extrusions and intrusions along the surface and normal to the grain boundaries. These processes ultimately weakened the grain boundary and led to the production of grain boundary cracks. These experimental findings challenge the theories suggesting a brittle-like origin of grain boundary cracks.
INTERNATIONAL JOURNAL OF FATIGUE
(2022)
Article
Materials Science, Multidisciplinary
Zhifu Zhao, Babak Safaei, Yanfei Wang, Fulei Chu, Yueguang Wei
Summary: This study investigated grain boundary elimination in two special bcc iron bicrystals through molecular dynamics simulations. The results showed that the elimination of grain boundaries enhanced resistance to intergranular fracture and led to directional anisotropy of intergranular crack propagation. The mechanisms of grain boundary elimination were revealed to be twinning and dislocation activities. This research provides valuable insights for grain boundary design.
MATERIALS & DESIGN
(2022)
Article
Chemistry, Physical
Xinxin Zhang, You Lv, Teruo Hashimoto, Jan-Olov Nilsson, Xiaorong Zhou
Summary: In this study, the influence of trace level Cu on intergranular corrosion in AA6082 alloy was investigated using accelerated corrosion testing and high resolution electron microscopy. It was found that Al2Cu precipitates promoted IGC at the grain boundaries.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Zheyuan Xing, Haidong Fan, Guozheng Kang
Summary: As an important micro-structure, grain boundary plays a significant role in the micro-structure evolution and mechanical property of metallic materials. This study investigates the propagation mechanisms of intergranular cracks along [1100] symmetric tilt grain boundaries in magnesium bicrystals under tensile loading conditions using comprehensive molecular dynamics simulations, considering the effects of grain boundary misorientation angle, temperature, and solid solution.
COMPUTATIONAL MATERIALS SCIENCE
(2022)
Article
Engineering, Mechanical
Danilo Rangel, Diego Erena, Jesus Vazquez, J. A. Araujo
Summary: This paper proposes a method to calculate fretting fatigue crack initiation and total life using iterative models calibrated with fatigue stress-strain-life curves, taking into account multiaxial non-proportional stress fields in fretting problems and stress gradient effects. The crack initiation path is obtained through the SWT parameter, and the analyzed results are validated by comparison with tests for an Aluminium 7075-T651 alloy in a cylindrical-flat configuration.
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2022)
Article
Engineering, Mechanical
Zhilin Tao, Le Chang, Jingwei Li, Chao Lv, Changyu Zhou
Summary: The influence of micronotch size on small fatigue-crack behavior of CP-Ti was investigated. An increase in micronotch size led to a decrease in fatigue life and average crack-arrest cycle. Crack arrest was found to result from high-angle grain boundaries, and the post-arrest behavior was characterized by the connection of main and secondary cracks, or the alternation of the slip system. A higher crack propagation rate was associated with prismatic slip, while the activation of other slip modes could decrease the crack propagation rate. The micronotch size affected the distribution of crack growth regions, but had little influence on the long crack propagation rate.
INTERNATIONAL JOURNAL OF FATIGUE
(2023)
Article
Materials Science, Multidisciplinary
Lin Li, Jie Yang, Zhiyuan Yang, Qi Sun, Li Tan, Qinghui Zeng, Minhao Zhu
Summary: Deformation twins play a crucial role in plastic deformation and affect the microstructural evolution and fatigue behavior of magnesium alloys. The study investigated the fatigue behavior of a rolled magnesium alloy using SEM and EBSD, revealing that {1012} twinning dominates the fatigue deformation process and residual twins increase with fatigue cycles. Cracks tend to initiate and propagate along {1012} twinning boundaries and slip bands, with numerous extrusions found in twinned areas.
MATERIALS CHARACTERIZATION
(2021)
Article
Materials Science, Multidisciplinary
Xingyu Feng, Jiayu Xie, Mingzheng Huang, Wenjun Kuang
Summary: This study investigated the preferential intergranular oxidation (PIO) behavior of low-angle grain boundaries (LAGBs) in alloy 600 exposed to simulated pressurized water reactor primary water. The results showed that all LAGBs were susceptible to PIO. Below a misorientation angle of 8.8 degrees, diffusion-induced grain boundary migration (DIGM) did not occur, resulting in slightly varied PIO depths among LAGBs. However, as the misorientation angle increased above 8.8 degrees, chromium (Cr) began to diffuse outward and DIGM took place, leading to a positive correlation between PIO and DIGM depths. Additionally, the PIO depth was not related to the misorientation angle, but instead exhibited an inverse relationship with the atom packing density of grain boundary planes.
Article
Materials Science, Multidisciplinary
Xingyu Feng, Qi Wang, Jiayu Xie, Wenjun Kuang
Summary: The intergranular degradation of Alloy 600 was studied in simulated pressurized water reactor primary water for seven different types of high-angle grain boundaries. All boundaries exhibited susceptibility to preferential intergranular oxidation (PIO), except for the ideal coherent twin boundary. Diffusion induced grain boundary migration (DIGM) typically occurred, and its depth was positively correlated with the extent of PIO. Interestingly, the PIO susceptibility was independent of the grain boundary misorientation angle or σ value, but related to the grain boundary atom packing density (GBAPD), where higher GBAPD values correlated with higher PIO resistance due to slower element diffusion.
Article
Engineering, Mechanical
R. Branco, P. A. Prates, J. D. Costa, J. A. Martins Ferreira, C. Capela, F. Berto
Summary: This study examines the notch fatigue behavior and crack initiation life estimation in maraging steel fabricated by laser beam powder bed fusion under multiaxial loading through experiments and numerical simulations. The results show that both simulation methods accurately predict the crack initiation sites, directions of crack growth, and fatigue life, with elastic-plastic predictions leading to smaller errors but slightly shifting to the non-conservative side.
INTERNATIONAL JOURNAL OF FATIGUE
(2021)
Article
Chemistry, Physical
T. J. Marrow, I Sulak, B-S Li, M. Vuksic, M. Williamson, D. E. J. Armstrong
Summary: Nano-indentation was used to study the (0001) surface of highly oriented pyrolytic graphite at temperatures up to 600 degrees C. The results revealed an increased tendency for inelastic deformation at high temperature, with buckling and kink formation of the graphite crystals.
Article
Engineering, Mechanical
Veronika Mazanova, Milan Heczko, Jaroslav Polak
Summary: Studies have shown that the mechanism of fatigue crack initiation in high-angle grain boundaries is controversial. In this research, experiments were conducted on super-austenitic stainless steel Sanicro 25 to study the surface features that developed during cyclic loading with high strain amplitudes. The results revealed the presence of slip markings on the surface of grains, as well as extrusions and intrusions along the surface and normal to the grain boundaries. These processes ultimately weakened the grain boundary and led to the production of grain boundary cracks. These experimental findings challenge the theories suggesting a brittle-like origin of grain boundary cracks.
INTERNATIONAL JOURNAL OF FATIGUE
(2022)
Article
Materials Science, Multidisciplinary
Ivo Sulak, Karel Hrbacek, Karel Obrtlik
Summary: This paper investigates the effects of minimum temperature and phase shift on the thermo-mechanical fatigue behavior of Inconel 713LC. The results show that out-of-phase loading is less damaging than in-phase loading, with intergranular cavitation being the main damage mechanism for in-phase loading, and honeycomb structures and plastic strain localization being typical for out-of-phase loading. The increase in temperature range significantly reduces fatigue life, especially for out-of-phase loading. The prevailing damage mechanisms and lifetime behavior are discussed based on SEM and TEM observations.
Article
Engineering, Mechanical
I. Sulak, K. Obrtlik, T. Babinsky, S. Guth
Summary: This study conducted high-temperature low-cycle fatigue experiments on nickel-based superalloy MAR-M247 at different strain rates. The deformation, damage, and lifetime behavior in relation to strain rate and cycle shape were observed. The results showed that the lifetime decreased as the strain rate decreased, indicating the negative influence of time-dependent creep and oxidation mechanisms. The lifetimes of the slow-fast and dwell-fatigue tests were lower than those for the fast-slow tests, despite the compressive mean stress in the former and tensile mean stress in the latter. Sl0w-fast and dwell-fatigue tests resulted in grain boundary cavitation.
INTERNATIONAL JOURNAL OF FATIGUE
(2022)
Article
Engineering, Mechanical
Ivo Sulak, Karel Obrtlik
Summary: This study investigates the cyclic stress response and damage mechanism of Ni-base superalloy Inconel 713LC under thermomechanical fatigue loading. The cyclic stress-strain curves and fatigue life curves were evaluated, revealing the impact of phase shift and dwells on the material performance. SEM and TEM analysis of the microstructure provided insights into the effect of dwells on thermomechanical fatigue characteristics.
INTERNATIONAL JOURNAL OF FATIGUE
(2023)
Article
Engineering, Mechanical
Ivo Sulak, Tomas Babinsky, Alice Chlupova, Aleksa Milovanovic, Lubos Nahlik
Summary: This study investigates the effects of building direction and heat treatment on the microstructure and mechanical properties of Inconel 939, a nickel-based superalloy produced by additive manufacturing. The results show differences in microstructure between the additive manufactured alloy and the cast alloy, and the additive manufactured material exhibits better mechanical properties.
JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY
(2022)
Article
Crystallography
Jaroslav Polak
Summary: The cyclic plastic deformation of polycrystals leads to the concentration of cyclic plastic strain in persistent slip bands (PSBs) which have different dislocation structure compared to the matrix. The formation of point defects, their migration, and the mechanics of dislocation motion in PSBs are quantitatively described. The localized cyclic plastic straining in PSBs results in the production of persistent slip markings (PSMs) on the surface. These PSMs contribute to surface relief and grain boundary relief, as well as the initiation of intragranular fatigue cracks and grain boundary cracks.
Article
Engineering, Mechanical
Ladislav Poczklan, Jaroslav Polak, Tomas Kruml
Summary: The endurance of 316L steel against multiaxial fatigue is examined. The fatigue life curve for torsional mode extends to longer fatigue lives, while tension/compression mode causes the earliest fracture. The fatigue life curves for both multiaxial modes are similar to the axial mode. Fourteen critical plane models for fatigue life predictions were applied and compared. The modified Smith-Watson-Topper models prove to be the most accurate. The criteria proposed by Fatemi and Socie, Li et al., Zhu et al., and Wang and Brown also produce satisfactory results. The Smith-Watson-Topper model leads to the most precise predictions of fatigue crack orientation.
INTERNATIONAL JOURNAL OF FATIGUE
(2023)
Article
Engineering, Mechanical
Alice Chlupova, Sergej Hloch, Akash Nag, Ivo Sulak, Tomas Kruml
Summary: The erosion of 25CrMo4 (EA4T) steel due to high-frequency water droplet impingement was studied with an ultrasonic droplet generator. This study focused on the surface and subsurface damage of railway axle steel, where pulsating water jet can be used as a surface treatment method to enhance fatigue resistance. The standoff distance was changed to investigate the effect of pulsating water jet, while keeping other parameters constant, and surface and subsurface conditions were analyzed using different microscopy techniques.
Article
Nanoscience & Nanotechnology
Ahmad Mirzaei, Peter D. Hodgson, Xiang Ma, Vanessa K. Peterson, Ehsan Farabi, Gregory S. Rohrer, Hossein Beladi
Summary: This study investigated the influence of parent austenite grain refinement on the intervariant boundary network in a lath martensitic steel. It found that refining the parent austenite grain led to a decrease in the fraction of certain boundaries in the martensite and an increase in the connectivity of low energy boundaries, ultimately improving the impact toughness.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
N. L. Church, C. E. P. Talbot, L. D. Connor, S. Michalik, N. G. Jones
Summary: Metastable beta Ti alloys based on the Ti-Nb system have attracted attention due to their unique properties. However, the unstable cyclic behavior of these alloys has hindered their widespread industrial use. Recent studies have shown that internal stresses, including those from dislocations, may be responsible for this behavior. This study demonstrates that inter-cycle thermal treatments can mitigate the unstable cyclic behavior, providing a significant breakthrough in our understanding of Ti-Nb superelastic materials.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Di Zhao, Chenchen Zhao, Ziyang Xiu, Jiuchun Yan
Summary: This study proposes a novel strategy for achieving the bonding of SiC ceramic and Al alloy using ultrasound. The ultrasound promotes the dissolution of Al into the solder, activating the solder and triggering the interfacial reaction between SiC ceramic and solder. With increasing ultrasonic duration, the bonding between SiC and Al transitions from partial to full metallurgical bonding.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Kang Du, Yang Zhang, Guangda Zhao, Tao Huang, Liyuan Liu, Junpeng Li, Xiyu Wang, Zhongwu Zhang
Summary: This paper systematically investigated the evolution of microstructure in Fe-Ni-Co-Al polycrystalline alloys and its effects on mechanical properties. The results revealed that the migration of grain boundaries in different processes is driven by different factors, which impacts the grain orientation and precipitate formation. In the process of directional recrystallization, grains with specific orientations grow in the grain boundary region and form the dominant orientation, while grains with lower migration rate form the minor orientation. The alloy produced through directional recrystallization exhibited good recoverable strain and superelastic strain, while the alloy produced through solid solution treatment showed no evident superelastic behavior.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Edohamen Awannegbe, Liang Chen, Yue Zhao, Zhijun Qiu, Huijun Li
Summary: This study employed laser metal deposition to additively manufacture Ti-15Mo wt% alloy, and subsequently subjected it to post-fabrication uniaxial thermomechanical processing. The results showed that different zones in the microstructure remained after processing, and deformation mechanisms mainly involved slip and martensite formation. The compressive mechanical properties were found to be dependent on strain rate, with higher flow stress and compressive strength observed at higher strain rates. Grain structure homogenisation was not achieved, leading to anisotropic tensile properties.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Reza Khatib Zadeh Davani, Enyinnaya George Ohaeri, Sandeep Yadav, Jerzy A. Szpunar, Jing Su, Michael Gaudet, Muhammad Rashid, Muhammad Arafin
Summary: This research aims to investigate the effect of roughing and finishing reductions on crystallographic texture. The results show significant heterogeneity in the centerline region, with higher intensity of certain textures. Drop Weight Tear Test indicates that steel specimens with lower and medium reductions exhibit superior low-temperature impact toughness compared to steel with higher reductions. The electrochemical hydrogen charging experiments confirm the presence of internal hydrogen cracks only in steel with lower and medium reductions.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Flavio De Barbieri, Denis Jorge-Badiola, Rodrigo Allende, Karem Tello, Alfredo Artigas, Franco Perazzo, Henry Jami, Juan Perez Ipina
Summary: This study examines the effect of Cr additions on the mechanical behavior of TWIP steel at temperatures ranging from 25°C to 350°C. The results indicate that different temperature-dependent strengthening mechanisms, including mechanical twinning, Dynamic Strain Aging, and slip bands, are at play. The stacking fault energy (SFE) influences the percentage of mechanical twinning, which in turn affects the strain hardening rate.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Hanlin Peng, Siming Huang, Ling Hu, Bingbing Luo, Liejun Li, Ian Baker
Summary: This study explores the weldability, microstructures, and mechanical properties of two L1(2)-nanoparticle-strengthened medium-entropy alloys after electron beam welding (EBW). The results show that strong yet ductile defect-free joints were produced, with larger grain sizes in the fusion zones compared to the heat-affected zones and base materials. Both EBWed MEAs exhibited high yield strengths, high ultimate tensile strengths, and good fracture strains at 77 K. The V-doping improved the cryogenic mechanical properties of the TMT MEA.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Yongxin Wang, Lei Chen, Lizi Shao, Shuo Hao, Motomichi Koyama, Xingzhou Cai, Xiaocong Ma, Miao Jin
Summary: This study investigated the tensile deformation behavior of an Mn-N bearing lean duplex stainless steel with metastable austenite. The results showed that the strain rate had significant influence on the work hardening, strain-induced martensitic transformation, and fracture mechanism.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Jong Woo Won, Seulbi Lee, Hye-Jeong Choe, Yong-Taek Hyun, Dong Won Lee, Jeong Hun Lee
Summary: Cold-rolled pure titanium showed improved sheet formability after undergoing cryogenic-deformation treatment. This treatment increased the thinning capability of the titanium and suppressed cracking during sheet forming. The formation of twins during deformation contributed to high thinning capability and increased strength through grain refinement and dislocation accumulation.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Handong Li, Lin Su, Lijuan Wang, Yanbin Jiang, Jiahui Long, Gaoyong Lin, Zhu Xiao, Yanlin Jia, Zhou Li
Summary: Homogenization heat treatment is a key procedure in controlling the second phase, enhancing composition uniformity, and workability of as-cast Cu-15Ni-8Sn alloy. This study found that electropulsing treatment (EPT) can significantly reduce treatment temperature and time, improve elongation and overall mechanical properties of the alloy.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Yuxuan Wang, Juntao Zou, Lixing Sun, Yunfei Bai, Zhe Zhang, Junsheng Cheng, Lin Shi, Dazhuo Song, Yihui Jiang, Zhiwei Zhang
Summary: A novel mechanical-heat-electricity synergistic method was proposed to enhance the mechanical properties of Cu-15Sn-0.3Ti alloy by forming annealing twins (ATs). The combination method of Rotary swaging (RS) and Electric pulse treatment (EPT) successfully induced recrystallization and refinement of the microstructure, leading to a significant increase in the strength of the alloy within a short time.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Zhiyi Ding, Jiangtao Xie, Tong Wang, Aiying Chen, Bin Gan, Jinchao Song
Summary: This study demonstrated the Ta-induced strengthening of CoCrNi-AlTi MEAs using nanoscale heterogeneous coherent precipitates. The addition of Ta and aging treatments significantly enhanced the mechanical properties of the alloy, including yield strength, ultimate tensile strength, and elongation.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Z. Y. You, Z. Y. Tang, B. Wang, H. W. Zhang, P. Li, L. Zhao, F. B. Chu, H. Ding
Summary: The mechanical properties and microstructural evolution of C-doped TRIP-assisted HEA under dynamic loading conditions were systematically investigated in this study. The results showed that dynamic tensile deformation led to an increase in yield strength and a decrease in ultimate tensile strength, with a trend towards increased total elongation. The primary deformation mechanisms shifted from TRIP and TWIP effects to deformation twinning and dislocations. The presence of carbides formed through C-doping hindered dislocation slip and promoted the activation of multiple twinning systems.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Feng Qin, Feihu Chen, Junhua Hou, Wenjun Lu, Shaohua Chen, Jianjun Li
Summary: Plastic instability in strong multilayered composites is completely suppressed by architecting nanoscale BCC Nb crystalline-amorphous CuNb interfaces.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
