Article
Materials Science, Multidisciplinary
Chunyu Dong, Xianming Zhao
Summary: The DRX behavior and microstructure evolution of HSLA steel were investigated through isothermal compression experiments. The flow stress was found to increase with the strain rate and decrease with the deformation temperature. A constitutive equation was established based on peak stress, and the deformation activation energy was determined. Processing maps were constructed to analyze the flow instability under different conditions. The nucleation mechanism and grain size of DRX were also studied.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Y. Q. Wang, Y. F. Shen, N. Jia, J. J. Wang, W. Y. Xue
Summary: This study investigates the hot-deformation process of low-Ni austenitic stainless steel through single-pass compression tests. The results show that increasing deformation temperature promotes recrystallization, while increasing strain rate leads to grain refinement. The 15Cr-10Mn-Ni-N austenitic stainless steel has a cost-effective advantage due to its low Ni addition, enabling reduced material costs without sacrificing mechanical properties.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Ke Zhang, Tenghao Zhang, Mingya Zhang, Zihao Chen, Hongbo Pan, Gengwei Yang, Yanguang Cao, Zhaodong Li, Xi Zhang
Summary: This study investigates the hot deformation behavior and dynamic recrystallization mechanism of Ti-V complex microalloyed high strength steel at different temperatures and strain rates. The results show that the flow stress curves exhibit dynamic recrystallization behavior at certain temperature and strain rate conditions, and the peak stress gradually decreases with increasing temperature and decreasing strain rate. The study also calculates the hot deformation activation energy of the Ti-V microalloyed steel and presents thermal processing maps.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Chemistry, Physical
Hemiao Jiang, Hongying Li, Dianyuan Huang, Yinghui Zhao, Jiwen Liu, Qing Gao, Hang He, Ximao Liu
Summary: In this study, the hot deformation behavior of 26CrMo7S steel was analyzed using a thermal simulator. The Arrhenius constitutive model was built and its accuracy was verified through error analysis. Hot processing maps were constructed to analyze the processing zone of the steel. The microstructure of the processing zones was observed and verified using electron backscattered diffraction (EBSD). The results show that the interaction of work hardening and dynamic softening influences the hot deformation behavior of 26CrMo7S steel.
Article
Chemistry, Physical
Lei Zhang, Shuai Yuan, Jinhui Wang, Lijia Chen, Peipeng Jin
Summary: This study investigated the effect of deformation temperature and strain rate on the hot deformation mechanism of an as-cast Mg-5Al-0.6Sc alloy. The results showed that the flow stress decreased with increasing temperature and decreasing strain rate. A constitutive equation was established to accurately predict the hot deformation behavior of the alloy. The optimal processing area was determined based on processing maps, and the microstructure evolution and dynamic recrystallization mechanism of the alloy were analyzed.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Yechen Deng, Yixin An, Yangzhihong Xiao, Xiaodong Zhan, Xiaoyong Zhang, Bingfeng Wang
Summary: Controlling the hot deformation mechanism and avoiding deformation instability are crucial in hot forging of titanium alloy. A high throughput experimental method was used to efficiently establish a deformation mechanism map by deforming double-cone specimens. The results showed a continuously varying strain distribution from 0.3 to 1.4, with dynamic recovery and dynamic recrystallization as the dominant deformation mechanisms. The formation of deformation bands and the aggravation of microstructural nonuniformity within the Ti-55511 titanium alloy were identified as leading to deformation instability.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Editorial Material
Materials Science, Multidisciplinary
Chang-an Li, Guoliang Qin, Hao Wang, Peihao Geng
Summary: This paper conducted hot compression experiments to analyze the deformation behavior and dynamic recrystallization of FGH96 at high temperature and strain rate conditions. Two strain modified viscoplastic constitutive models were established and proven to accurately reflect the deformation behavior and suitable for numerical simulation of IFW.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Chemistry, Physical
Jiebo Lu, Wenjie Xin, Tengfei Ma, Xiaohong Wang, Duo Dong, Dongdong Zhu
Summary: The microstructural evolution and dynamic recrystallization behavior of a dual-phase medium entropy alloy were studied under different temperature and strain rate conditions. The initial dual-phase microstructures were characterized and the deformation activation energy was calculated. The appropriate hot deformation parameters were determined based on the hot processing map and deformation microstructure. It was also found that the continuity of dynamic recrystallization depended on the deformation temperature.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Junbo Yu, Shuyong Jiang, Peng Lin, Dong Sun, Bingyao Yan, Yanqiu Zhang
Summary: A novel FeSiCrNi high silicon steel with Cr and Ni elements added is fabricated. FeSiCrNi high silicon steel consists of A2 disordered phase, alpha-Fe phase, and a few B2 ordered phases. The constitutive equation considering strain compensation accurately describes the flow stress of FeSiCrNi sample during compressive deformation at high temperatures. Microstructure characterization shows that the addition of Ni and Cr elements inhibits dynamic recrystallization. Dynamic recovery is dominant at 700 and 800 degrees C, while dynamic recrystallization is dominant at 900 and 1000 degrees C. Continuous dynamic recrystallization appears in alpha-Fe and A2 phases simultaneously. λ and γ fiber textures are observed in the deformed FeSiCrNi samples.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2023)
Article
Materials Science, Multidisciplinary
Yahui Han, Changsheng Li, Jinyi Ren, Chunlin Qiu, Shuaishuai Chen, En Li
Summary: The study investigated the dynamic recrystallization behavior of as-cast 4Cr5MoSiV1 steel through hot compression tests conducted at different temperatures and strain rates. It was found that the nucleation of DRX was mainly performed by bulging and sub-grain swallowing, and the presence of dendrite segregation had a significant impact on DRX.
JOURNAL OF MATERIALS SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Youchuan Mao, Xianghong Liu, Yu Wang, Hongchao Kou, Haoyan Hu, Haisheng Chen, Kaixuan Wang, Yuxuan Du
Summary: This paper investigates the hot deformation behavior, microstructural evolution, and texture evolution of a new solution-treated titanium alloy. The constitutive equation of the alloy is obtained through compression tests, and the flow stress is accurately predicted. The study finds both discontinuous and continuous dynamic recrystallization in the microstructures of the deformed alloys, with deformation temperature and strain rate playing significant roles. Plastic deformation and dynamic recrystallization comprehensively influence the texture evolution of the alloy.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Metallurgy & Metallurgical Engineering
Jian Sun, Jinghui Li, Ping Wang, Zhenyi Huang
Summary: The hot deformation behavior and optimum working parameters of Fe-30Mn-10Al-1C low-density steel were investigated through experiments and modeling, revealing flow stress, activation energy, and the dominant deformation mechanism during hot compression.
TRANSACTIONS OF THE INDIAN INSTITUTE OF METALS
(2022)
Article
Materials Science, Multidisciplinary
Z. Sangari Motlagh, B. Tolaminejad, A. Momeni
Summary: The study evaluated the capabilities of four constitutive equations and a newly developed phenomenological model in describing the hot flow behavior of 1.4542 stainless steel. The original ZA model was found to be effective for large strains, with subsequent modifications improving predictions for low strain levels. The Arrhenius-type constitutive equations showed good agreement with experimental results at low strain rates, but some deviations were observed at high strain rates.
METALS AND MATERIALS INTERNATIONAL
(2021)
Article
Materials Science, Multidisciplinary
Pankaj Rawat, Ujjwal Prakash, V. V. Satya Prasad
Summary: The hot deformation behavior of a high Al ferritic low-density steel was investigated, revealing different microstructures and dynamic recrystallization phenomena at different temperatures. The microstructure of the material was significantly refined when deformed in the intercritical region. A constitutive equation was derived to accurately predict the flow stress of the material during hot deformation.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2023)
Article
Materials Science, Multidisciplinary
Sumit Kumar, Anish Karmakar, Sumeer K. Nath
Summary: Hot forged 1Cr-1Mo and 9Cr-1Mo steels are increasingly used in turbine rotor manufacturing for steam power plants, requiring precise control of processing parameters for defect-free products. A comparative study analyzed the hot deformation behavior of both steels, determining flow stress behavior, activation energy, Zener-Hollomon parameter, and critical conditions for dynamic recrystallization. The study also focused on the comparison of dynamically recrystallized austenite volume fraction with respect to true strain. Microstructural evaluation and characterization were conducted to validate the kinetics of DRX and softening mechanism.
METALS AND MATERIALS INTERNATIONAL
(2021)
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)