Article
Crystallography
Baohua Nie, Shuai Liu, Yue Wu, Yu Song, Haiying Qi, Binqing Shi, Zihua Zhao, Dongchu Chen
Summary: The effect of low cycle fatigue (LCF) predamage with no precracks on very high cycle fatigue (VHCF) properties and crack initiation characteristics for TC21 titanium alloy was investigated. It was found that LCF predamage with less than 5% of fatigue life had minimal impact on fatigue limit but reduced fatigue life. Fatigue cracks initiated on the surface of the specimen at high stress amplitudes, while fatigue cracks initiated below the surface at low stress amplitudes. A combined fatigue damage model was established based on Lemaitre damage theory, and it showed consistency with experimental data. The fatigue crack initiation of specimens with LCF predamage less than 5% accounted for a significant portion of fatigue life.
Review
Engineering, Mechanical
Riccardo Caivano, Andrea Tridello, Giorgio Chiandussi, Guian Qian, Davide Paolino, Filippo Berto
Summary: This paper provides a comprehensive literature review on the very high cycle fatigue (VHCF) response of materials produced through additive manufacturing (AM) processes. Experimental results on VHCF response of various specimens produced through different AM processes are summarized. The main factors affecting the VHCF response of AM materials are compared and critically analyzed.
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES
(2021)
Article
Crystallography
Baohua Nie, Shuai Liu, Yue Wu, Yu Song, Haiying Qi, Binqing Shi, Zihua Zhao, Dongchu Chen
Summary: VHCF tests were conducted on TC21 titanium alloy under variable amplitude loading. The cumulative fatigue life of low stress amplitude was significantly reduced by the high/low stress block, and fatigue crack initiation shifted from the subsurface under constant loading to the surface under stress block. A fatigue damage model of two-step stress block was established based on continuum damage mechanics, which provided a good prediction of cumulative fatigue life. The cumulative fatigue damage of the stress block was influenced by stress amplitude and cycle ratio, determining the stress fatigue damage and its interaction damage. The surface crack initiation in the stress block accelerated fatigue damage of low stress amplitude, leading to reduced cumulative life.
Review
Engineering, Mechanical
A. Tridello, C. Boursier Niutta, F. Berto, D. S. Paolino
Summary: This paper critically reviews the size-effect in very high cycle fatigue (VHCF), analyzing experimental results obtained by testing specimens with different sizes and discussing methodologies proposed to model the size-effect, with the aim of guiding future research on the size-effect in VHCF.
INTERNATIONAL JOURNAL OF FATIGUE
(2021)
Article
Engineering, Mechanical
Garrett A. Webster, Alireza Behvar, Shawkat I. Shakil, Riyanka Ribble, Kathleen Chou, Ajay Krishnamurthy, Shahab Zekriardehani, Joseph Lawrence, Sajad Shakerin, Mohsen Mohammadi, Andrea Tridello, Davide S. Paolino, Meysam Haghshenas
Summary: This paper presents a comprehensive study on the VHCF characterization of WAAM ER100S-G steel, revealing its extended fatigue life behavior and failure mechanisms. The findings provide valuable insights into optimizing design guidelines for additive manufacturing in high-cycle and very high-cycle fatigue domains.
ENGINEERING FAILURE ANALYSIS
(2023)
Article
Engineering, Mechanical
S. V. Sajadifar, E. Scharifi, T. Wegener, M. Krochmal, S. Lotz, K. Steinhoff, T. Niendorf
Summary: This study evaluated the mechanical properties of thermo-mechanically processed AA6082 and AA7075 sheets under cyclic loading through low-cycle fatigue experiments. Different cooling rates resulted in precipitates with varying sizes and morphologies. The specimens processed in tools with temperatures of 24°C and 200°C exhibited superior mechanical properties, while different behavior was observed for the specimens formed in the tool with a temperature of 350°C. Thorough analysis of microstructural features revealed the significant impact of thermal history on the final performance of high-strength aluminum alloys.
INTERNATIONAL JOURNAL OF FATIGUE
(2022)
Article
Mechanics
Hongjiang Qian, Zhiyong Huang, Yeting Xu, Qikai Zhou, Jian Wang, Jiebin Shen, Zeshuai Shen
Summary: This study uses Monte Carlo Simulation (MCS) to expand the low VHCF dataset and proposes a dynamic recurrent machine learning model, which significantly improves the predictive performance of ML models. The challenge of predicting the life of sparse VHCF specimens is solved, reducing the cost and time of VHCF prediction.
ENGINEERING FRACTURE MECHANICS
(2023)
Article
Engineering, Mechanical
Tao Shi, Jingyu Sun, Jianghua Li, Guian Qian, Youshi Hong
Summary: Using machine learning models and data interpolation, the influence of defect features on the fatigue performance of selective laser melted AlSi10Mg alloys was investigated. The results showed that increasing defect distance, circularity, and layer thickness improved fatigue life, while increasing stress amplitude, stress ratio, and defect size decreased fatigue life.
INTERNATIONAL JOURNAL OF FATIGUE
(2023)
Article
Materials Science, Multidisciplinary
Xianghui Zhu, Xusheng Yang, Weijiu Huang, Weiyi Qiu, Xin Wang, Fei Guo, Li Hu, Miao Gong
Summary: The influence of pre-stretching on microstructure, tensile properties, and fatigue behavior of AA2099-T8 sheets was studied. Increasing the pre-strain level resulted in a more uniform distribution and increasing density of the T1 phase. The non-uniform distribution of the T1 phase led to a decrement in elongation and a strong in-plane anisotropy of tensile properties. An appropriate level of pre-strain should be executed to improve elongation and reduce tensile anisotropy. The resistances of fatigue crack propagation were gradually decreased with the increment of pre-strain due to the increment in yield strength and more uniform distribution of the T1 phase.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Engineering, Mechanical
Jun Li, Zhengmao Yang, Guian Qian, Filippo Berto
Summary: This study proposed an ML model for VHCF analysis, enlarged dataset size through Monte Carlo simulation, and achieved good prediction accuracy.
INTERNATIONAL JOURNAL OF FATIGUE
(2022)
Article
Materials Science, Multidisciplinary
Xiangnan Pan, Leiming Du, Guian Qian, Youshi Hong
Summary: This study investigates the behavior of very-high-cycle fatigue (VHCF) in metallic materials such as aluminum alloys and high-strength steels. The research reveals that in additively manufactured AlSi10Mg alloy, crack initiation and growth mechanisms are distinct from those in high-strength steels, but demonstrate a similar characteristic region of crack initiation known as fine granular area (FGA).
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2024)
Article
Engineering, Mechanical
Kun Yang, Qi Huang, Bin Zhong, Yong Jie Liu, Chao He, Hanqing Liu, Ning Su, Qingyuan Wang, Qiang Chen
Summary: The research showed that increasing the colony content in bimodal titanium alloys can enhance the high cycle fatigue and very high cycle fatigue properties. However, crack initiation life is less sensitive to changes in microstructure compared to fatigue crack growth life. As fatigue life increases, the impact of microstructure evolution on fatigue resistance gradually decreases.
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES
(2021)
Article
Physics, Applied
Mikhail Bannikov, Vladimir Oborin, Yuriy Bayandin, Dmitry Ledon, Dmitriy Kiselkov, Andrey Savinykh, Gennady Garkushin, Sergey Razorenov, Oleg Naimark
Summary: The study reveals that foreign object damage can reduce the fatigue strength of materials during consecutive loading, and examines the transition of fatigue damage and crack initiation through amplitude-frequency analysis. Additionally, profiling measurements are used to identify the roughness scale invariants in damaged areas, contributing to the formulation of crack propagation laws.
JOURNAL OF APPLIED PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
Huafang Li, Yan Huang, Xiaojing Ji, Cuie Wen, Lu-Ning Wang
Summary: This study systematically evaluated the fatigue and corrosion fatigue behaviors of two types of extruded zinc alloys in different environments. The results showed that the fatigue limits of the alloys were significantly reduced in simulated body fluid, and the corrosion fatigue life had a linear relationship with the stress amplitude. The formation of corrosion pits was the main reason for the initiation of fatigue cracks in the fluid environment.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Marek Smaga, Annika Boemke, Dietmar Eifler, Tilmann Beck
Summary: The fatigue behavior of two austenitic stainless steels, AISI 904L and AISI 347, with different surface morphologies was studied. AISI 904L is stable against deformation-induced phase formation, while AISI 347 is in the metastable state and shows martensite formation induced by cryogenic turning and mechanical loading. The metastable austenite of AISI 347 achieved true fatigue limits up to load cycle N = 1 x 10^9 and showed increased fatigue strength due to surface modification.
Article
Engineering, Mechanical
Yajun Dai, Shijian Wang, Qiyuan He, Chang Liu, Xianyu Wang, Xue Li, Lang Li, Yongjie Liu, Chao He, Qingyuan Wang
Summary: The multi-scaled microstructure of martensitic steel significantly affects the initiation and early propagation of cracks. Micro cracks first occur in the slip bands inside the single crystal laths, then coalesce through the lath boundaries, and finally propagate slowly in neighboring grains.
INTERNATIONAL JOURNAL OF FATIGUE
(2023)
Article
Chemistry, Multidisciplinary
Gang Huang, Qingquan Kong, Weitang Yao, Qingyuan Wang
Summary: A high ratio of active nitrogen-doped hard carbon (PTA-Lys-800) was synthesized by the classical Mannich reaction and showed outstanding cycling stability and rate performance in sodium-ion batteries. This was attributed to its stable hierarchical pore structure, abundant defects, and a high proportion of N-5 formed during the carbonization process. The study presents a new method for designing carbonaceous anode materials with high capacity and long cycle life.
Article
Construction & Building Technology
Hongen Zhang, Bei He, Xinping Zhu, Qingyuan Wang, Zhengwu Jiang
Summary: This study investigates the flexural performance of ultra-high-performance concrete (UHPC) under a simulated lunar ground temperature environment and characterizes the cracking behavior using acoustic emission (AE) technique. The results show that UHPC specimens exposed to the alternating elevated and cryogenic attack (AECA) still exhibit superior flexural performance. Tensile cracks are mainly generated by the failure of cement matrix, while shear cracks are mainly attributed to the debonding and pull-out behavior of steel fibers from the matrix. AECA exhibits a dual effect on the flexural performance of UHPCs, with a competitive relationship between enhancement and deterioration effects.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Engineering, Mechanical
Jie-Wei Gao, Rui-Peng Han, Shun-Peng Zhu, Hai Zhao, Jose A. F. O. Correia, Qingyuan Wang
Summary: This paper investigates the influence of induction hardening on the damage tolerance of EA4T axles through artificial impact damage. The damage modes and loading capacity debit of two types of specimens were analyzed, and failure mechanisms were discussed. The results show that the compressive residual stress from induction hardening can significantly improve the fatigue strength of damaged specimens.
ENGINEERING FAILURE ANALYSIS
(2023)
Article
Materials Science, Multidisciplinary
Meng Liu, Quanyi Wang, Yifan Cai, Dong Lu, Yubing Pei, Hong Zhang, Yongjie Liu, Qingyuan Wang
Summary: The microstructure and anisotropic mechanical properties of Inconel 625 superalloy prepared by selective laser melting were studied. The samples printed along the horizontal direction showed the highest strength and the lowest ductility. The work-hardening behaviors were analyzed based on grain size and texture.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2023)
Article
Chemistry, Physical
Jie Cui, Daixin Fu, Lin Mi, Lang Li, Yongjie Liu, Chong Wang, Chao He, Hong Zhang, Yao Chen, Qingyuan Wang
Summary: In this study, fiber bundles were manually extracted from different parts of bamboo stems and subjected to heat treatment. The mechanical properties of the fiber bundles and the micromechanical properties of the fiber cell walls were studied. The results showed that the tensile strength and elasticity of the fiber bundles decreased, while the elasticity and hardness of the fiber cell walls increased with increasing temperature. The tensile strength and elasticity slightly decreased from the outer to the inner part of the bamboo stems. The study provides a scientific basis for the selective utilization, functional optimization, and bionic utilization of bamboo materials.
Editorial Material
Chemistry, Physical
Yu Chen, Qingyuan Wang
Article
Chemistry, Physical
Sen Tang, Xinyu Wang, Beihai Huang, Dongtong Yang, Lang Li, Chao He, Bo Xu, Yongjie Liu, Chong Wang, Qingyuan Wang
Summary: This paper proposes an accelerated fatigue test method based on ultrasonic loading technology to investigate the bending fatigue characteristics of thin-plate structures in the very high cycle fatigue (VHCF) regime. A new bending fatigue specimen with a frequency of 20 kHz was designed and verified by axial load tests. The results showed that the method effectively transferred dangerous cross-sections and demonstrated a linear relationship between vibration amplitude and maximum stress. The S-N curves and fracture morphology were consistent with conventional studies, indicating the reasonability of the bending test model design.
Article
Engineering, Mechanical
Quanyi Wang, Meng Liu, Yifan Cai, Tianjian Wang, Yubing Pei, Hong Zhang, Yongjie Liu, Qingyuan Wang
Summary: The effect of mean stress on the fatigue failure behavior of 9% Cr steel at high temperatures is studied through high cyclic fatigue tests. Three fatigue failure modes are identified: surface crack initiation failure, sub-surface crack initiation failure, and necking induced failure. The surface and sub-surface crack initiation failure modes gradually change to necking induced failure mode with increasing stress ratio. The oxide intrusive-extrusion mechanism and inhomogeneous microstructure play important roles in determining the fatigue failure behavior.
INTERNATIONAL JOURNAL OF FATIGUE
(2023)
Article
Engineering, Mechanical
Bo Xu, Chong Wang, Qingyuan Wang, Chao Yu, Qianhua Kan, Guozheng Kang
Summary: A new Ni-concentration dependent phase field model is proposed to investigate the elastocaloric effects (eCEs) of NiTi shape memory alloys (SMAs) with different Ni-concentration gradients and various aspect ratios. The results show that the martensite transformation start stress of NiTi SMAs increases progressively during tensile loading, leading to a small stress-strain hysteresis loop and improvement in the coefficient of performance of material (COPmat). The optimal eCE is achieved when the sample has both a small Ni-concentration gradient and a small aspect ratio, or a large Ni-concentration gradient and a large aspect ratio.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Chemistry, Physical
Yunqing Jiang, Tongfei Zou, Meng Liu, Yifan Cai, Quanyi Wang, Yunru Wang, Yubing Pei, Hong Zhang, Yongjie Liu, Qingyuan Wang
Summary: The effect of strain rate and temperature on the thermomechanical behavior and microstructure of MarBN steel was studied. Higher strain rates were better predicted by the Holloman and Ludwigson equations, while lower strain rates were better predicted by the coupling of the Voce and Ludwigson equations. However, the deformation microstructures had the same evolution behavior under different strain rates and temperatures. The strengthening sources of MarBN steel included grain boundary strengthening, dislocation interactions, and multiplication. The phenomenological models of JC (RT and 430 degrees C) and KHL (630 degrees C) showed the best prediction accuracy under both strain rates.
Article
Engineering, Biomedical
Qingyuan Wang, Haiyan Yang, Yuan Liu, Zhaoxi Zhou, Xu Zhang, Mingyi Sang, Feng Xu, Lebin Song, Tiansong Xia, Yue Zhang, Jifu Wei, Xiaobo Zhang, Qiang Ding
Summary: Mast cells, which are heavily present in cancer cells, play a crucial role in tumor formation. By releasing histamine and proteases, activated mast cells can weaken the tumor microenvironment and allow for the infiltration of nano-drugs. Orthogonally excited rare earth nanoparticles (ORENP) with two channels are used to stimulate tumor-infiltrating mast cells and release drugs for increased tumor infiltration. The combined use of chemical and cellular tools enhances the efficacy of nano-chemotherapy.
ADVANCED HEALTHCARE MATERIALS
(2023)
Article
Chemistry, Physical
Xiaojun Chen, Qiangguo Li, Xiaodong Zhu, Qingyuan Wang, Xiaonan Liu, Xiaoqiang Wu
Summary: Direct formate fuel cells (DFFCs) have gained attention for their security, affordability, and high energy conversion efficiency. However, the performance of DFFCs is unsatisfactory due to rapid activity loss caused by Hads-poisoning of the anode Pd catalysts during formate oxidation. In this study, a CuFe2O4 complex was introduced into Pd to enhance activity and mitigate Hads-poisoning for improved durability.
APPLIED SURFACE SCIENCE
(2023)
Review
Mechanics
Ping Xia, Qiancheng Liu, Hua Fu, Yaping Yu, Lijuan Wang, Qingyuan Wang, Xue Yu, Feng Zhao
Summary: Bio-inspired double-layered helix honeycomb structure was successfully developed using 3D printing technique. The novel structure exhibited enhanced mechanical properties and energy absorption capability compared to regular honeycomb. The findings provide a new avenue for engineering honeycomb structures with improved performance for various applications.
COMPOSITE STRUCTURES
(2023)
Article
Chemistry, Physical
Tongfei Zou, Meng Liu, Yifan Cai, Quanyi Wang, Yunqing Jiang, Yunru Wang, Zhenheng Gao, Yubing Pei, Hong Zhang, Yongjie Liu, Qingyuan Wang
Summary: In this study, uniaxial tensile tests were conducted on additive manufacturing 939 superalloy at various temperatures to investigate its mechanical properties, fracture behaviors, and deformation mechanisms. The experimental results showed a significant decrease in yield, tensile strength, and elongation with increasing temperature. The fracture surfaces exhibited plastic fracture characteristics at room temperature and multiple slip systems were observed at higher temperatures. The deformation mechanism was primarily controlled by single slip system at room temperature, while thermal energy activated more slip systems and promoted dislocation movement at intermediate temperatures, and large-scale stacking faults and dislocation by-passing and climbing mechanisms were observed at high temperatures.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
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)