Article
Chemistry, Physical
Chi Zhang, Yanxin Du, Liwen Zhang, Chen Jin, Xiaoguang Zhou, Fei Li
Summary: The hot deformation behavior of a Ni-Cr-Mo based superalloy C276 was investigated under shifted strain rate conditions, revealing different flow stress and microstructure evolutions compared to constant strain rate compressions. A cellular automaton model successfully predicted the dynamic recrystallization behavior in non-constant hot processing of C276 superalloy.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Emil Eriksson, Fabian Hanning, Joel Andersson, Magnus Hornqvist Colliander
Summary: Understanding the microstructural behaviour of materials during thermomechanical processing is crucial for achieving optimal mechanical properties. We investigated the dynamic recrystallization (DRX) behaviour of Ni-base superalloy Haynes 282 during hot compression and observed the formation of small DRX grains before the peak strain. The DRX process accelerated significantly above a certain strain, and the material was fully recrystallized at a higher strain. Contrary to common assumptions, many DRX grains contained dislocation substructures, even at small strains.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Yan-Xing Liu, Zhi-Jiang Ke, Run-Hua Li, Ju-Qing Song, Jing-Jing Ruan
Summary: The study revealed that grain growth in the Ni-based superalloy is mainly controlled by grain boundary migration, with a minor pinning effect from the precipitates.
Article
Materials Science, Multidisciplinary
Min Ling, Zi-Sheng Zhang, Yi-Long Liang, Yuan-Biao Tan
Summary: The hot deformation behavior of GH4169 alloy in homogeneous and mixed-crystal states was investigated. The results showed that the peak stress of the homogeneous alloy was lower than that of the mixed-crystal alloy at the same temperature and strain rate. Microstructural analysis revealed that the differences were caused by different initial grain sizes and dynamic recrystallization mechanisms.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2022)
Article
Materials Science, Multidisciplinary
Franco Lizzi, Kashyap Pradeep, Aleksandar Stanojevic, Silvana Sommadossi, Maria Cecilia Poletti
Summary: The study investigates the evolution of microstructure and stresses during hot deformation of a prototype alloy IN718WP, similar in composition to Inconel(R) 718. Compression tests conducted at different temperatures and strain rates showed similar flow curves to Inconel(R) 718. Factors influencing stress softening and dynamic recrystallization, such as fast recrystallization rate and formation of deformation bands, were analyzed and quantified using metallography.
Article
Materials Science, Multidisciplinary
Emil Eriksson, Joel Andersson, Magnus Hornqvist Colliander
Summary: This study examines the effect of grain boundary carbides on dynamic recrystallization during hot compression of Ni-base superalloy Haynes 282, and indicates that carbides do not significantly influence the process. The carbide solvus temperature is not a critical limit during thermomechanical processes as well.
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2022)
Article
Nanoscience & Nanotechnology
Tian Liu, Xiaonong Cheng, Rui Luo, Yu Cao, Hengnan Ding, Leli Chen, Yuyan Yang, Yu Liu
Summary: The plastic thermal deformation behaviors of solid solution strengthened Ni-based superalloy Inconel 617B at different temperatures were systematically investigated, with the steady-state stress found to be positively correlated with temperature and the obstruction from M23C6 particles decreasing with the increase in temperature.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Heyong Qin, Qiang Tian, Wenwen Zhang, Qiang Du, Haizhu Li, Xingang Liu, Ping Yu
Summary: This study investigated the microstructure evolution and dynamic recrystallization mechanism of GH4742 superalloys double-cone specimens during hot compression using various microtechniques. It was found that carbides and γ' phase particles have different effects on the DRX process.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2022)
Article
Materials Science, Multidisciplinary
Hao Liu, Xinbao Zhao, Yong Yuan, Yingying Dang, Weiqi Li, Jiachen Xu, Yuan Cheng, Quanzhao Yue, Yuefeng Gu, Ze Zhang
Summary: The influence of long-term thermal exposure on the microstructure evolution and tensile behavior of a new wrought y'-hardened Ni-base superalloy has been investigated. The results show that discontinuous carbides precipitate at the grain boundaries and spherical y' precipitates disperse uniformly within the y matrix after heat treatment. During thermal exposure, the y' precipitates remain spherical morphology and their coarsening behavior follows the LSW model. The tensile strength of the experimental superalloy generally decreases with the increase of tensile temperature after heat treatment, while the elongation reaches its maximum at 650 degrees C. After thermal exposure, the tensile strength of the experimental superalloy improves while the elongation slightly decreases.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Materials Science, Multidisciplinary
Qingqing Ding, Hongbin Bei, Xia Yao, Xinbao Zhao, Xiao Wei, Jin Wang, Ze Zhang
Summary: Tensile testing at various temperatures has revealed the deformation mechanisms of a Ni-based single crystal superalloy. The deformation mode of the alloy strongly depends on temperature, with competitive responses of the gamma and gamma' phases under mechanical loading playing a critical role. Deformation substructures and mechanisms have been systematically revealed from micrometer to atomic scales, providing comprehensive understanding and mechanistic guidelines for designing new/next generation superalloys.
APPLIED MATERIALS TODAY
(2021)
Article
Materials Science, Multidisciplinary
Xingyu Pan, Chonglin Jia, Zhiyong Ji, Chunlei Qiu
Summary: Direct hot forging of heavily-alloyed Ni-based superalloy castings often leads to cracking due to macro-segregation. To solve this problem, hot extrusion is proposed as an alternative technology for processing these superalloys. In this study, a cast and wrought Ni-based superalloy GH4151 was successfully processed by hot extrusion without cracking, and extensive twinning played a crucial role in accommodating plastic deformation. Dynamic recrystallization occurred, resulting in significant grain refinement. The hot-extruded GH4151 exhibited superior mechanical properties compared to state-of-the-art disc superalloys and could be further improved with heat treatment.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Nanoscience & Nanotechnology
Tian Liu, Xiaonong Cheng, Hengnan Ding, Leli Chen, Qian Wang, Di Zhang, Rui Luo
Summary: The effect of strain on the microtexture and recrystallization of the GH4169 alloy was investigated using EBSD. The strain gradually increases from the edge to the center of the compressed sample, leading to increased recrystallization. The generation of new sigma 3 boundaries within the DRX grains affects the deformation microstructure, resulting in a decrease in the overall maximum intensity of the microtexture.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Materials Science, Multidisciplinary
Hongyu Li, Wei Feng, Wuhao Zhuang, Lin Hua
Summary: In this study, thermal hot compression tests were conducted on a Ni-Cr-Co-based superalloy using a Gleeble-3500 thermal simulator. The results showed that both discontinuous dynamic recrystallization (DDRX) and continuous dynamic recrystallization (CDRX) occurred simultaneously during hot deformation. The proposed models accurately described the work-hardening and dynamic softening behaviors, as well as the evolution of dynamic recrystallization grain size in the Ni-Cr-Co-based superalloy.
Article
Materials Science, Multidisciplinary
Masaya Higashi, Naoya Kanno
Summary: The study showed that the hot workability of a powder metallurgy Ni-based superalloy is influenced by the initial microstructure, with coarse-grained samples having poor hot workability regardless of deformation conditions. In contrast, fine-grained samples exhibited varied hot workability depending on deformation conditions, with a peak observed at the sub-solvus temperature. The presence of prior particle boundaries (PPBs) acted as cavity nucleation sites and crack paths, leading to early fracture and decreased hot workability, especially at lower temperatures and higher strain rates.
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2021)
Article
Chemistry, Physical
Rong Kong, Bao Meng, Xin Ma, Youchun Li, Lihuang Zheng, Yu Zhu, Min Wan
Summary: The hot deformation behavior and microstructural evolution of Inconel 625 superalloy sheet under different conditions were investigated. The plastic flow behavior of the Inconel 625 sheet changes from work hardening to hot softening with the rise of experimental temperature and the decline of strain rate. The optimal hot working window appears at the temperature range of 925 and 950 degrees C and the strain rate between 0.001 and 0.1 s-1 with the power dissipation efficiency of about 46.5%.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Nanoscience & Nanotechnology
Yan-Xing Liu, Y. C. Lin, Hong-Bin Li, Dong-Xu Wen, Xiao-Min Chen, Ming-Song Chen
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2015)
Article
Materials Science, Multidisciplinary
Y. C. Lin, Dong-Xu Wen, Ming-Song Chen, Yan-Xing Liu, Xiao-Min Chen, Xiang Ma
JOURNAL OF MATERIALS RESEARCH
(2016)
Article
Computer Science, Artificial Intelligence
Y. C. Lin, Jia Li, Ming-Song Chen, Yan-Xing Liu, Ying-Jie Liang
NEURAL COMPUTING & APPLICATIONS
(2018)
Article
Materials Science, Multidisciplinary
Y. C. Lin, Yan-Xing Liu, Ming-Song Chen, Ming-Hui Huang, Xiang Ma, Zhi-Li Long
MATERIALS & DESIGN
(2016)
Article
Materials Science, Multidisciplinary
Yan-Xing Liu, Y. C. Lin
HIGH TEMPERATURE MATERIALS AND PROCESSES
(2018)
Article
Materials Science, Multidisciplinary
Y. C. Lin, Yan-Xing Liu, Ge Liu, Ming-Song Chen, Yuan-Chun Huang
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2015)
Article
Instruments & Instrumentation
Hua Tan, Yuxun Zhang, Yanxing Liu, Xiaoquan Fu
INFRARED PHYSICS & TECHNOLOGY
(2019)
Article
Materials Science, Multidisciplinary
Ping-hu Chen, Yun Zhang, Rui-qing Li, Yan-xing Liu, Song-sheng Zeng
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
(2020)
Article
Chemistry, Physical
Ping Long, Dongxu Wen, Jie Min, Zhizhen Zheng, Jianjun Li, Yanxing Liu
Summary: The study investigates the influence of linear energy input and cooling rate on the microstructure evolution, mechanical properties, and fracture mechanisms of steel deposited using cold metal transfer-based wire arc additive manufacturing system. The microstructures mainly consist of delta-ferrite and austenite dendrites, with sigma phase forming under low cooling rate conditions. The primary dendrite spacing decreases with lower linear energy input or higher cooling rate, affecting the mechanical properties of the steel. Mesoscopic damages are mainly caused by pore coalescence under low linear energy input, while dislocation piling up around delta-ferrite induces cracks under high linear energy input.
Article
Chemistry, Physical
Yan-Xing Liu, Zhi-Jiang Ke, Run-Hua Li, Ju-Qing Song, Jing-Jing Ruan
Summary: The study revealed that grain growth in the Ni-based superalloy is mainly controlled by grain boundary migration, with a minor pinning effect from the precipitates.
Article
Chemistry, Analytical
Hua Tan, Jiahui Pan, Xiaojia Zheng, Xiaoquan Fu, Yuxun Zhang, Yanxing Liu, Qiheng Huang
Summary: This study utilizes femtosecond laser glass welding technology to form four different porous structures of welding spots through specific manufacturing processes. The welding spot fabricated by the flattened Gaussian beam exhibits smooth edges and a flat pore bottom. The welding spot manufactured with alternating high repetition rates introduces multiple refractive indices.
Article
Optics
Hua Tan, Yuxun Zhang, Yanxing Liu, Xiaoquan Fu
JOURNAL OF OPTICS-INDIA
(2020)
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)