Article
Nanoscience & Nanotechnology
Chengsi Zheng, Bo Fu, Yang Tang, Lingli Kong, Yongqiang Wang, Na Li
Summary: The microstructure and mechanical properties of strengthening-toughening treated 9Cr18Mo martensitic stainless steel were investigated. It was found that the size range of carbides in the steel was wide, with most of them located at the grain boundary and in the grain interior. The steel with a higher volume fraction of submicron-carbides showed a better combination of strength and impact energy. The study also found specific carbide morphologies and structural features that could be helpful in understanding the correlation between microstructure and mechanical properties of other high carbon chromium martensitic steels.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Materials Science, Multidisciplinary
Ayda Shahriari, Mehdi Sanjari, Hadi Pirgazi, Fateh Fazeli, Babak Shalchi Amirkhiz, Leo A. Kestens, Mohsen Mohammadi
Summary: This study investigated the effect of heating rate on phase transformation temperatures and the microstructural evolution of Fe-Cr-Ni maraging stainless steel parts during the heating process. It was found that austenite reversion occurred in two steps, involving a diffusive mechanism and precipitation reactions. Grain refinement occurred during the continuous heating process, but the grain size increased after isothermal heating.
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2022)
Article
Nanoscience & Nanotechnology
Jianquan Wan, Haihui Ruan, Zhiyi Ding, Ling Bing Kong
Summary: A new ultra-high strength maraging stainless steel with a unique combination of intermetallic precipitates has been developed, enabling its ultimate tensile strength to reach 3.15 GPa with balanced ductility and uniform elongation. Maximizing the austenite content before cold-rolling and ageing treatments is crucial to achieve such high strength without sacrificing uniform elongation. Precipitation hardening is significantly enhanced by the net-like sigma phase during tensile deformation, peaking at an ageing temperature of 525 degrees C for 3.5 hours.
SCRIPTA MATERIALIA
(2023)
Article
Materials Science, Multidisciplinary
Huili Sun, Dongdong Li, Yupeng Diao, Yang He, Luchun Yan, Xiaolu Pang, Kewei Gao
Summary: This study characterized the evolution of nanoscale Cu-rich precipitates in precipitation-hardening stainless steel using a high-resolution transmission electron microscope. The results show that the structure of the precipitates changed during aging and affected the mechanical properties.
MATERIALS CHARACTERIZATION
(2022)
Article
Nanoscience & Nanotechnology
Dinghui Liu, Jie Su, Ao Wang, Zhuoyue Yang, Jiaoxi Yang, Zhen Wang, Yali Ding, Geng Liu
Summary: In this study, FeCrNiCoMo maraging stainless steel was fabricated by laser melting deposition. The microstructural evolution during aging with different time and post heat treatments was investigated. The microsegregation profoundly affected the austenite reversion behavior, promoting the nucleation and growth of reverted austenite that eventually formed a net-like structure. The different heat treatments resulted in varying austeinte structures and mechanical properties.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Xiaowen Sun, Dongyun Sun, Yuefeng Wang, Fucheng Zhang, Guoliang Sheng, Yanming He, Tiansheng Wang
Summary: The microstructure and properties of bainitic multiphase steels with bainitic ferrite as the main phase were investigated. The relationship between the multiphase characteristics and mechanical properties was analyzed quantitatively. The results showed that the PM-BF-RA samples obtained higher strength and exhibited high plasticity and toughness.
JOURNAL OF MATERIALS SCIENCE
(2022)
Article
Nanoscience & Nanotechnology
Mingcai Pan, Junqiang Xu, Ningning Liang, Yong Peng, Qi Zhou, Kehong Wang
Summary: A laminated heterostructured material (LHM) was prepared using wire and arc additive manufacturing method, and its microstructure, chemical composition, texture, and mechanical properties were investigated. The study found deviations in chemical composition and differences in microstructure in different regions of the LHM. Furthermore, the LHM exhibited improved plasticity and mechanical properties.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Nanoscience & Nanotechnology
Vinothkumar Govindaraj, Peter Hodgson, Rajkumar P. Singh, Hossein Beladi
Summary: The study found that the distribution of Ni plays an important role in austenite reversion in maraging stainless steel. Cu precipitation hardening and martensite tempering controlled the mechanical properties, while the change in strengthening mechanism from precipitation hardening to martensite strengthening caused significant changes in tensile flow behavior with an increase in aging temperature.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Engineering, Manufacturing
Xingyuan Mei, Yu Yan, Huadong Fu, Xiaodong Gao, Shiyu Huang, Lijie Qiao
Summary: This study investigated the microstructure evolution of 18Ni(300) maraging steel during laser-powder bed fusion. It evaluated the changes in cell structure, precipitation sequence, and austenite reversion at different aging temperatures. The study found that the yield strength of the steel was mainly influenced by the martensite lath and solid solution strengthening, as well as by the presence of omega particles, Ni3Ti particles, and reverted austenite.
ADDITIVE MANUFACTURING
(2022)
Article
Nanoscience & Nanotechnology
Jun Lu, Shuize Wang, Hao Yu, Guilin Wu, Junheng Gao, Honghui Wu, Haitao Zhao, Chaolei Zhang, Xinping Mao
Summary: The relationship between microstructural evolution and strengthening mechanisms in a vanadium micro-alloyed HSLA martensitic steel was systematically investigated. Precipitation and dislocation strengthening were found to be the main factors causing strength evolution with different isothermal holding time at 600 degrees C. The precipitation strengthening effect of solution quenching specimens was higher than that of isothermal annealing specimens because of its finer particle size and higher volume fraction of the MC precipitates.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Nanoscience & Nanotechnology
L. Y. Kan, Q. B. Ye, Y. F. Shen, Z. D. Wang, T. Zhao
Summary: This study investigated the influence of co-precipitation of nanosized Cu particles and carbides on the microstructures and mechanical properties of high strength low alloy steels. The results showed that the co-precipitation induced precipitation strengthening, leading to higher strength while maintaining good impact toughness. However, excessive nanosized Cu particles deteriorated the impact toughness. In addition, Cu addition inhibited the selection of martensitic variants and increased the fraction of high angle grain boundaries, which enhanced the impact toughness.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Nanoscience & Nanotechnology
Guang Yang, Fangbin Deng, Siyu Zhou, Bin Wu, Lanyun Qin
Summary: A novel Cu-reinforced SHER120-G maraging steel was developed for wire arc additive manufacturing process, with improved mechanical properties due to the formation of uniform and dense distribution of ε-copper particles after direct ageing. The yield strength and microhardness were significantly increased, while the elongation and impact toughness were further improved by finer martensite laths, disappearance of delta-ferrite, and formation of higher content of reversed austenite during ageing.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Metallurgy & Metallurgical Engineering
Xinbo Ji, Liming Fu, Han Zheng, Jian Wang, Hengchang Lu, Wei Wang, Mao Wen, Han Dong, Aidang Shan
Summary: An ultrafine lamellar-structured martensite steel fabricated by heavy warm rolling (HWR) shows excellent strength and ductility. By tempering the steel, the comprehensive mechanical properties can be further improved, with high-density nanoprecipitates contributing to the ultrahigh strength and tempered grains accommodating dense dislocations for good ductility.
ACTA METALLURGICA SINICA-ENGLISH LETTERS
(2022)
Article
Nanoscience & Nanotechnology
C. Zhang, C. Wang, S. L. Zhang, Y. L. Ding, Q. L. Ge, J. Su
Summary: The aging process significantly affects the mechanical properties of maraging stainless steel due to the interaction between intermetallic compounds and dislocations. The precipitates formed at different aging temperatures have distinct effects on the strength and toughness of the material. The growth and coarsening of Ni-3(Ti, Al) precipitates, as well as the increase in reverted austenite, play critical roles in determining the mechanical properties of the material over a wide temperature range.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Metallurgy & Metallurgical Engineering
Wang Bin, Niu Mengchao, Wang Wei, Jiang Tao, Luan Junhua, Yang Ke
Summary: The introduction of submicro/nanometer-sized retained or reverted austenite in maraging stainless steels can improve the strength-ductility/toughness trade-off dilemma. In this study, the addition of copper was investigated as a strategy to accelerate austenite reversion in a maraging stainless steel. The aging process resulted in the precipitation of Cu- and Mo-rich phases and the formation of reverted austenite, leading to a substantial increase in toughness. After 90 hours of aging, the steel exhibited excellent strength and toughness properties compared to commercial maraging stainless steels.
ACTA METALLURGICA SINICA
(2023)
Review
Materials Science, Multidisciplinary
Tao Zhou, Revathy Prasath Babu, Ziyong Hou, Peter Hedstrom
Summary: Precipitation hardening is a crucial strengthening mechanism in metallic materials, with control of precipitation vital for optimizing mechanical performance and other requirements. An integrated approach of theory, computations, and experimental characterization is currently in the spotlight for this purpose. The transmission electron microscope is the most versatile tool for characterizing precipitation, providing detailed information on precipitate structure and morphology.
CRITICAL REVIEWS IN SOLID STATE AND MATERIALS SCIENCES
(2022)
Article
Chemistry, Analytical
Rongbin Li, Hongde Xia, Qian Huang, Peter Hedstrom, Wangzhong Mu, Kai Wei, Fengqin Liu, Hongliang Zhao
Summary: Quantitative mass spectrometry analysis for multi-component gas phase reaction processes is a complex nonlinear problem with multiple inputs and outputs. Conventional linear calibration and analytical methods may lead to misjudgment of reaction mechanisms and inaccuracies in determining reaction kinetics. This study confirms the nonlinearity of mass spectrometry and proposes methods to properly handle the nonlinearity, allowing accurate determination of physical parameters and characterization of reaction mechanisms and dynamics.
ANALYTICA CHIMICA ACTA
(2022)
Article
Nanoscience & Nanotechnology
Vladilena Gaisina, Michael Andersson, Manon Bonvalet-Rolland, Joakim Odqvist, Per-Lennart Larsson, Peter Gudmundson
Summary: The aim of this study is to investigate the influence of controlled porosity on the mechanical properties of a bainitic microstructure. Uniaxial tensile and compression testing, as well as Vickers macro- and microhardness experiments, are used to determine the behavior of the matrix material. The results show that assuming spherical pores is not sufficient in predicting experimental results.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Jianling Liu, Yadunandan Das, Stephen M. King, Jan Y. Jonsson, Sten Wessman, Peter Hedstrom
Summary: This study investigated the effects of cooling rate after solution treatment on the initial structure and the subsequent phase separation (PS) evolution during aging of super duplex stainless steel. The results showed that the different cooling rates resulted in different initial structures, which in turn affected the rate of phase separation during aging. In addition, pronounced phase separation was observed after aging at 475 degrees C for 180 min, and a slower cooling rate after solution treatment promoted more significant phase separation.
Article
Materials Science, Multidisciplinary
Erik Claesson, Hans Magnusson, Joachim Kohlbrecher, Mattias Thuvander, Fredrik Lindberg, Magnus Andersson, Peter Hedstrom
Summary: Two industrially processed low-alloyed martensitic tool steel alloys were characterized to study their precipitation behavior. The results show that complex precipitation sequences occur in these materials during processing, and the high number density of Mo-rich secondary carbides is essential for strengthening these tool steels.
Article
Materials Science, Multidisciplinary
Chrysoula Ioannidou, Hans-Henrik Konig, Nick Semjatov, Ulf Ackelid, Peter Staron, Carolin Koerner, Peter Hedstrom, Greta Lindwall
Summary: Additive Manufacturing (AM), including Laser-Powder Bed Fusion (L-PBF), Electron beam-Powder Bed Fusion (E-PBF), and Directed Energy Deposition (DED), is a significant technology for manufacturing metallic materials. In-situ synchrotron X-ray characterization is a suitable tool for understanding the microstructure evolution during these processes. This article provides an overview of the research on metal PBF and DED using in-situ synchrotron X-ray imaging, diffraction, and small-angle scattering, highlighting the state of the art, instrumentation, challenges, and knowledge gaps.
MATERIALS & DESIGN
(2022)
Article
Materials Science, Multidisciplinary
Jianling Liu, Yadunandan Das, R. Prasath Babu, Sten Wessman, Jan Y. Jonsson, Joakim Odqvist, Stephen M. King, Peter Hedstrom
Summary: The nanoscale phase separation in the ferrite phase of super duplex stainless steel weldments was quantitatively investigated, and the results showed that the phase separation was more pronounced in the weldments, which could be attributed to the higher chemical element content and residual strain in the weldments.
MATERIALS CHARACTERIZATION
(2022)
Article
Materials Science, Multidisciplinary
Monika Rolinska, Fredrik Gustavsson, Peter Hedstrom
Summary: The extraction replica technique is a useful method for preparing transmission electron microscopy samples, which eliminates the influence of the surrounding matrix on compositional or crystallographic analysis. This study summarizes the techniques for extracting various precipitates from different alloys and compares the efficiency of the direct replica method with the two-stage replica method. The results indicate that the direct method has a higher particle extraction efficiency for smaller particles and also facilitates the analysis of other features in certain cases.
MATERIALS CHARACTERIZATION
(2022)
Article
Materials Science, Multidisciplinary
Adam Stahlkrantz, Peter Hedstrom, Niklas Sarius, Annika Borgenstam
Summary: Variant pairing in bainite was investigated in four different commercial low alloy steels with varying carbon content and austempering temperatures. The results showed that the most frequent variant pairing changed with temperature and carbon content, with V1-V6 being most common at lower temperatures. However, as the austempering temperature increased, variant pairings with lower misorientation boundaries such as V1-V4 and V1-V8 became more prevalent. Additionally, higher carbon content in the steel resulted in a less pronounced preferred variant pairing at intermediate temperatures. The study also observed a continuous increase in variant pairing within the same Bain group with increasing austempering temperature for all steels, along with an increase in deviation from the theoretical Kurdjumov-Sachs orientation relationship.
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Thomas Kohne, Tuerdi Maimaitiyili, Aimo Winkelmann, Emad Maawad, Peter Hedstrom, Annika Borgenstam
Summary: The martensitic transformation in a high carbon steel was studied using a new experimental approach, focusing on the nucleation, growth, and variant pairing of the early-formed martensite. It was found that the early-formed martensite predominantly grew along the prior austenite grain boundaries and had a stronger plate character compared to the later-formed martensite.
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Chenchong Wang, Kaiyu Zhu, Peter Hedstrom, Yong Li, Wei Xu
Summary: In this study, a generic model for predicting the martensite start temperature (M-s) was developed using deep data mining and deep learning methods. By integrating thermodynamic calculations, traditional machine learning, and deep learning modeling, the final model showed excellent generalizability and extensibility.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Deepjyoti Mukherjee, Henrik Larsson, Joakim Odqvist
Summary: A phase-field model is used to simulate diffusion-induced grain boundary migration in binary Fe-Zn, and the simulation results are compared to experimental observations.
Article
Chemistry, Physical
Guanghui Yang, Jiyeon Kang, Amanda Carsbring, Wangzhong Mu, Peter Hedstrom, Jin-Kyung Kim, Joo Hyun Park
Summary: The precipitation of Cr-rich BCC particles was found to be dependent on the chemical composition of Fe-Cr-Ni medium entropy alloys. These particles played a significant role in the hardening of the alloys. The different precipitation behaviors at two temperatures resulted in variations in grain size distribution and hardness.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Thomas Kohne, Johan Fahlkrans, Albin Stormvinter, Emad Maawad, Aimo Winkelmann, Peter Hedstrom, Annika Borgenstam
Summary: The martensitic transformation in high-carbon steels with different cooling rates was studied through in situ and ex situ experiments. The results showed that the cooling rate and the steel's Ms had a significant impact on the transformation, affecting the tetragonality and phase fraction of martensite formed. Slower cooling rates resulted in a decrease in average tetragonality and a lower fraction of martensite at room temperature but an increase in autotempered martensite. The distribution of martensite tetragonality was found to be heterogeneous for all cooling rates.
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Tim Fischer, Carl F. O. Dahlberg, Peter Hedstrom
Summary: This paper investigates the cyclic deformation behavior in lath martensite-based high-strength steels using a crystal plasticity finite element method. It is found that both the Hutchinson and Chaboche-Cailletaud flow rules can accurately predict the local stress and strain distributions within the hierarchical martensitic microstructure. However, using the Hutchinson flow rule improves computational performance and leads to a re-distribution of the bimodal local stresses at a lower stress level when assuming plastic deformation on the {112}(111) slip system.
COMPUTATIONAL MATERIALS SCIENCE
(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)
