Article
Engineering, Mechanical
Hanzhong Deng, Lei Wang, Yang Liu, Xiu Song, Fanqiang Meng, Teng Yu
Summary: The fatigue crack propagation behavior of the IN718 superalloy aged with stress was found to exhibit a higher crack growth rate and lower fatigue threshold compared to that aged without stress. This was attributed to the promotion of restricted dislocation planar slip and decreased orientation difference of the activated slip system between adjacent grains by coarse gamma '' phases, leading to increased local plastic deformation and reduced crack deflection. The accelerated formation of coarse gamma '' phases caused by applied stress was identified as the key factor in the degradation of fatigue crack propagation resistance in the alloy aged with stress.
INTERNATIONAL JOURNAL OF FATIGUE
(2021)
Article
Crystallography
Anqi Liu, Fei Zhao, Wensen Huang, Yuanbiao Tan, Yonghai Ren, Longxiang Wang, Fahong Xu
Summary: GH4169 alloy is strengthened primarily through precipitation, with heat treatment being crucial for regulating the precipitates. However, the effects of aging temperature on the microstructure and properties of GH4169 have not been thoroughly studied. This study investigated the impact of aging temperature on precipitates and mechanical properties of GH4169 alloy using various techniques. The results showed that increasing aging temperature led to larger gamma and gamma ' phases and promoted the precipitation of delta phase at grain boundaries. The alloy aged at 750 degrees C exhibited the highest yield strength and the Portevin-Le Chatelier effect weakened as the aging temperature increased.
Article
Engineering, Manufacturing
Riddhi Sarkar, Bo Chen, Michael E. Fitzpatrick, Daniel Fabijanic, Tim Hilditch
Summary: The room-temperature high-cycle fatigue (HCF) behavior of IN718 repaired joints via laser direct energy deposition (DED) was investigated. The effects of different heat treatment conditions, solution treated and aged (STA) and directly aged (DA), were compared. The results showed that, although the heat treatment improved the hardness profile, the fatigue performance of the DED joints decreased regardless of the heat treatment conditions. The STA condition exhibited better HCF performance at low stress, while the DA condition showed better performance at high stress.
ADDITIVE MANUFACTURING
(2022)
Article
Materials Science, Multidisciplinary
Han-zhong Deng, Lei Wang, Yang Liu, Xiu Song, Fan-qiang Meng, Shuo Huang
Summary: The research investigated the evolution law of the delta phase of IN718 superalloy in a temperature/stress coupled field. The results demonstrated that the delta phases accelerate precipitates on the grain boundaries with applied stress, and both the nucleation and growth rate of a delta phase will be significantly accelerated with stress in the temperature/stress coupled field.
MATERIALS CHARACTERIZATION
(2022)
Article
Materials Science, Multidisciplinary
Christopher H. Zenk, Longsheng Feng, Donald McAllister, Yunzhi Wang, Michael J. Mills
Summary: The study investigates the shear process of Ni-base superalloy 718 at different temperatures and the deformation mechanisms of the co-precipitates. It reveals the presence of different intrinsic stacking faults in the gamma '' and gamma' phases, as well as offsetting of interfaces in the co-precipitates after shearing.
Article
Materials Science, Multidisciplinary
Chuanli Yu, Zhiyong Huang, Zian Zhang, Jian Wang, Jiebin Shen, Zhiping Xu
Summary: Additive manufacturing has great potential in manufacturing complex and precise parts, but defects generated during the process limit its applications. This study used ultrasonic fatigue testing to evaluate the effects of sandblasting and hot isostatic pressing on the very high cycle fatigue (VHCF) performance of IN718 fabricated by selective laser melting. Characterization of defects, including size and location, was done using X-ray computed tomography and a 3D-optical profiler. Sandblasting improved the surface state and shifted crack initiation sites from the surface to the interior. With the elimination of defects and the introduction of compressive residual stress, the fatigue resistance was significantly improved.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Materials Science, Multidisciplinary
Han-zhong Deng, Lei Wang, Yang Liu, Xiu Song, Fan-qiang Meng, Shuo Huang
Summary: Stress accelerates the coarsening rate of the gamma '' phase of IN718 alloy, while Nb atom diffusion is a key factor affecting this coarsening process.
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
Sean P. Murray, Alice Cervellon, Jonathan Cormier, Tresa M. Pollock
Summary: Research shows that fatigue crack initiation is mainly influenced by oxidation-assisted surface cracking in air, while the fatigue performance improves under vacuum due to the presence of internal casting pores. Additionally, recrystallized regions on the fracture surfaces of both alloys in the vacuum test condition have been identified, which was not previously reported for single crystal Ni-base alloys.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Chemistry, Physical
Yang Liu, Lei Wang, Kaiyue Yang, Xiu Song
Summary: The high cycle fatigue properties of IN718 alloy treated by warm laser shock processing (WLSP) after high-temperature ageing were investigated. The strengthening and toughening mechanism of WLSP on the hardened surface layer of IN718 alloy was revealed, showing highly stable strengthening effects at high temperature. WLSP demonstrated superior fatigue resistance and prolonged fatigue life for the alloy under long-term elevated temperature service compared to conventional laser shock peening (LSP).
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Metallurgy & Metallurgical Engineering
Xie Jun, Shu De-long, Hou Gui-chen, Yu Jin-jiang, Zhou Yi-zhou, Sun Xiao-feng
Summary: The study on low-cycle fatigue (LCF) behavior of K416B alloy at 650 degrees C reveals that the fatigue life of the alloy depends on its material strength, characterized mainly by elastic deformation. Deformation mechanism of the alloy in tension-compression fatigue involves dislocation slip reflected in a dislocation configuration similar to the Frawk-Reed source. During late stages of LCF, fatigue-induced cracks develop from the alloy surface and may propagate along regions of eutectic and bulk M6C carbide, leading to cleavage fracture.
JOURNAL OF CENTRAL SOUTH UNIVERSITY
(2021)
Article
Materials Science, Multidisciplinary
Hanzhong Deng, Lei Wang, Yang Liu, Xiu Song, Fanqiang Meng, Teng Yu
Summary: The microstructures and tensile properties of IN718 superalloy aged under different stress conditions were studied. It was found that the coarsening of y00 phase and precipitation of 8 phase in the alloy were significantly accelerated under temperature/stress coupled field. The alloys aged with stress exhibited lower strength and plasticity, indicating that the applied stress accelerated the degradation of their tensile properties.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Nanoscience & Nanotechnology
Saeede Ghorbanpour, Jonathan Bicknell, Marko Knezevic
Summary: In this study, successful additive manufacturing of cobalt-based superalloy Mar-M-509 (R) via laser powder bed fusion was reported. The research examined the effects of build orientation and subsequent heat treatments on the microstructure evolution and monotonic strength and ductility of the alloy. Fatigue behavior, including low cycle fatigue (LCF) and high cycle fatigue (HCF), was investigated under different strain and stress amplitudes. The results showed anisotropic behavior in LCF, with higher amplitudes perpendicular to the build direction (BD), and longer fatigue life along the BD. In contrast, HCF behavior was found to be isotropic. The observed fatigue characteristics were correlated with the initial microstructure of the alloy.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Pedro Jacinto Paramo-Kanetas, Utkudeniz Ozturk, Jessica Calvo, Martha Patricia Guerrero-Mata, Marco Antonio Zamora-Antunano, Jose Maria Cabrera-Marrero
Summary: Delta-Processing is used to control grain growth during hot deformation of the Ni-base superalloy Inconel 718. This study investigates the precipitation of M23C6 carbides and their interaction with recrystallization phenomena after the alloy has been saturated with delta-phase. Double-strain hot compression tests were conducted to analyze the softening/hardening progress over time, with microstructural characterization using SEM and XRD to identify precipitating/dissolving phases.
MATERIALS CHARACTERIZATION
(2021)
Article
Engineering, Multidisciplinary
Guo QianYing, Ji KangKang, Zhang Teng, Qiao ZhiXia, Li Chong, Li Jun, Liu ChenXi, Liu YongChang
Summary: This paper investigates the microstructure evolution and tensile behavior of a high-temperature oxidation-resistant alloy during long-term thermal exposure. The study reveals that the evolution of the alloy's microstructure, such as the change in morphology of the gamma' phase and the increase in the amount of eta phase, contributes to the deterioration of its tensile strength. These changes are caused by factors such as the increase in gamma'/gamma misfit and the consumption of Al, Ti, and Nb. The formation of sigma phases near eta phases also plays a role in reducing the alloy's tensile strength.
SCIENCE CHINA-TECHNOLOGICAL SCIENCES
(2022)
Article
Materials Science, Multidisciplinary
Quanfeng Xiao, Yuanming Xu, Xinling Liu, Xinghui Jia
Summary: This study investigates the high cycle fatigue behavior of a Ni-base single crystal super-alloy at 760 degrees C and 850 degrees C. At 760 degrees C, the crack grows in the crystallographic shearing mode and the crack tip propagation mechanism is non-crystallographic mode. When the temperature rises to 850 degrees C, recrystallization grains are observed in the fatigue initiation region, and the stress reduction leads to the increment of accumulative strain and the aggravation of recrystallization.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Chemistry, Physical
Jinghao Xu, Zaiwang Huang, Liang Jiang
JOURNAL OF ALLOYS AND COMPOUNDS
(2018)
Article
Nanoscience & Nanotechnology
Wenkai Deng, Jinghao Xu, Yunming Hu, Zaiwang Huang, Liang Jiang
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2019)
Article
Materials Science, Multidisciplinary
Jinghao Xu, Hans Gruber, Dunyong Deng, Ru Lin Peng, Johan J. Moverare
Article
Engineering, Mechanical
Hugo Warner, Jinghao Xu, Guocai Chai, Johan Moverare, Mattias Calmunger
Summary: The study found that coherent Cu-precipitates and incoherent Nbcarbides in Sanicro 25 hinder dislocation motion, increase hardening, and improve high temperature properties, while sparsely placed intergranular Cr- and Nb-carbides in Esshete 1250 make it susceptible to creep damage and intergranular crack propagation. Dynamic recrystallization of the plastic zone at the crack tip seemed to affect crack propagation of Sanicro 25 by providing an energetically privileged path.
INTERNATIONAL JOURNAL OF FATIGUE
(2021)
Article
Materials Science, Multidisciplinary
Luqing Cui, Shuang Jiang, Jinghao Xu, Ru Lin Peng, Reza Taherzadeh Mousavian, Johan Moverare
Summary: The relationship between microstructures and hardening nature of laser powder bed fused (L-PBF) 316 L stainless steel has been studied, showing that the hardness of the alloy is predominantly governed by GNDs. During annealing treatments, the migration of GNDs and the decrease of SSD density play important roles in the hardness variation of the material.
MATERIALS & DESIGN
(2021)
Article
Materials Science, Multidisciplinary
Olutayo Adegoke, Satyanarayana Rao Polisetti, Jinghao Xu, Joel Andersson, Hakan Brodin, Robert Pederson, Peter Harlin
Summary: Alloy 247LC samples were subjected to solution heat treatment at 1260 degrees C for 2 h, resulting in a significant increase in grain size and recrystallization. Isolated cases of twinning were observed in the as-built + heat-treated samples. Laser power was found to be the most significant process parameter influencing grain size.
MATERIALS CHARACTERIZATION
(2022)
Article
Engineering, Manufacturing
Jinghao Xu, Taoran Ma, Ru Lin Peng, Seyed Hosseini
Summary: The study found that hot isostatic pressing effectively eliminated the Laves phase in the as-built microstructure and brought about uniformly distributed super fine gamma '' precipitates in nano-meter size. Heat treatment promoted larger gamma '' precipitates directly from the as-built material, while HIP+HT process caused a moderate growth of gamma ''. In both latter cases, the developed gamma '' significantly strengthened the material.
ADDITIVE MANUFACTURING
(2021)
Article
Materials Science, Multidisciplinary
Jinghao Xu, Hakan Brodin, Ru Lin Peng, Vladimir Luzin, Johan Moverare
Summary: This study systematically investigates the microstructural evolution of the laser-powder bed fused (L-PBF) nickel-base superalloy CM247LC during post-processing heat treatment. The results show that recrystallization barely occurs below the gamma' solvus temperature, while it is introduced above the solvus temperature. By considering the grain boundary migration mechanisms and supported by experimental observations, the sluggish recrystallization behavior of this alloy has been understood.
MATERIALS CHARACTERIZATION
(2022)
Article
Materials Science, Multidisciplinary
Jinghao Xu, Paraskevas Kontis, Ru Lin Peng, Johan Moverare
Summary: This study investigates the additive manufacturability of nickel-based superalloys for laser powder bed fusion (LPBF) technologies by considering the in-process cracking mechanisms. A two-parameter-based model, called heat resistance and deformation resistance (HR-DR) model, is proposed to predict the cracking susceptibility of nickel-based superalloys during LPBF. The model is validated through LPBF experiments and compared with reported data in the LPBF superalloys community. The model provides insights into the influence of alloying elements and gamma' precipitates on the additive manufacturability and offers a pathway for designing new solid solutioning and gamma' strengthened nickel-based superalloys for LPBF applications.
Article
Chemistry, Physical
Jialiang Chen, Jinghao Xu, Mikael Segersaell, Eduard Hryha, Ru Lin Peng, Johan Moverare
Summary: This study investigated the effects of powder reuse on the mechanical performance of a nickel-based superalloy. It was found that metallic oxides with increased oxygen content were present on the surface of the reused powders. Negligible deterioration in strength and tensile ductility was observed, while there was some scatter in fatigue performance with regard to fatigue life. Deformation and fatigue crack propagation mechanisms were discussed to describe the effects of powder degradation.
Article
Engineering, Mechanical
Stefan B. Lindstrom, Johan Moverare, Jinghao Xu, Daniel Leidermark, Robert Eriksson, Hans Ansell, Zlatan Kapidzic
Summary: The study employs the Ottosen-Stenstrom-Ristinmaa (OSR) incremental fatigue damage model for assessing the fatigue life of integral airframes made from 7050-T7451 aluminum plates. Validation is done through variable-amplitude high-cycle fatigue experiments conducted on circumferentially notched axisymmetric specimens and a geometry resembling an aircraft fuselage frame with flanges, stiffeners, and web panels. The paper also discusses the modification of OSR model parameters to account for surface roughness and acceptable failure probability.
INTERNATIONAL JOURNAL OF FATIGUE
(2023)
Article
Chemistry, Physical
Jinghao Xu, Hans Gruber, Ru Lin Peng, Johan Moverare
Article
Materials Science, Multidisciplinary
Jinghao Xu, Hans Gruber, Robert Boyd, Shuang Jiang, Ru Lin Peng, Johan J. Moverare
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)