Article
Materials Science, Multidisciplinary
Kai Ling, Wenfeng Mo, Pan Deng, Junwei Chen, Binghui Luo, Zhenhai Bai
Summary: The hot deformation behavior of the Al-4.96Cu-0.96Mg-0.63Ag-0.57Mn-0.13Zr-0.02Ti alloy was studied by conducting hot compression experiments. The flow stress of the alloy decreases with increasing temperature and decreasing strain rate. The highest stress is reached at a large strain due to the difficulty of the dynamic softening effect to offset the work hardening caused by high-density dislocations. The optimal processing parameters region exhibits dynamic recrystallization as the dominant softening mechanism.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Guo-Wei Bo, Guan Wang, Fu-Lin Jiang, Can Liu, Rong Chen, Hui Zhang
Summary: The study revealed that the hot deformation behavior of Al-Cu-Mg-Zr alloy varies significantly depending on the homogenization cooling rate, with dynamic precipitation as the main softening mechanism for the high cooling rate alloy and dynamic recrystallization and precipitation coarsening for the low cooling rate alloy.
Article
Materials Science, Multidisciplinary
Jiwu Huang, Chenglong Xu, Shichao Liu, Fuqing Jiang
Summary: This paper investigates a novel Al-Zn-Mg-Cu-Mn-Sc-Zr alloy with excellent quenching sensitivity and a quench-hardening depth of more than 150 mm. Different quenching rates affect the hardness of the alloy, and after artificial aging, various precipitates are observed on the grain boundaries and different phase interfaces.
Article
Chemistry, Physical
Jingyu Jiang, Feng Jiang, Hongfeng Huang, Menghan Zhang, Zhongqin Tang, Mengmeng Tong
Summary: The deformation behavior and microstructure evolution of the alloy are significantly affected by deformation temperature and strain rate. High temperature and low strain rate are beneficial for dynamic recrystallization or dynamic recovery.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Chang-Hee Cho, Dal-Oh Kim, Kwangtae Son, Hyun-Soon Park
Summary: Al-Zn-Mg-Cu alloys exhibit the best mechanical properties among aluminum alloys, but suffer from poor formability during metalworking processes. This study investigates the high-temperature deformation behavior and mechanisms of an Al-Zn-Mg-Cu alloy, highlighting flow instabilities at higher strain rates and cooler temperatures, reduced recrystallization, diminished power dissipation efficiencies, and notable alpha-fiber generation.
JOURNAL OF MATERIALS SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Ya Tang, Daihong Xiao, Lanping Huang, Renxuan You, Xinyue Zhao, Nan Lin, Yunzhu Ma, Wensheng Liu
Summary: The study reveals that compression temperature significantly influences the characteristic and dynamic behavior of secondary phases in Al-Cu-Li alloy during hot deformation. Proper strain rates can accelerate the formation and growth of T-1 phase, but at higher temperatures, T-1 phase may completely dissolve into the matrix.
MATERIALS CHARACTERIZATION
(2022)
Article
Materials Science, Multidisciplinary
Ya Tang, Daihong Xiao, Lanping Huang, Renxuan You, Xinyue Zhao, Nan Lin, Yunzhu Ma, Wensheng Liu
Summary: In this study, the evolution of deformation microstructures and multiscale phases in Al-Cu-Li alloy was investigated under different temperatures and strain rates. The results showed that the compress temperature has an impact on the characteristic and dynamic deformation behaviors of secondary phases. Proper strain rates can promote the formation and growth of multistage banded T-1 phase.
MATERIALS CHARACTERIZATION
(2022)
Article
Materials Science, Multidisciplinary
Qi Zhao, Zhiyi Liu
Summary: The texture growth and relative mechanism of Al-Cu-Mg-(Zr) alloy during annealing were investigated using three-dimensional Orientation Distribution Functions (ODFs), Electron Back Scattered Diffraction (EBSD), and Transmission Electron Microscopy (TEM). The addition of Zr in the alloy restricts the growth of recrystallized Goss grain and does not improve the total intensity of Goss texture. The Brass texture of the Al-Cu-Mg-Zr alloy can be enhanced at specific annealing temperature.
METALS AND MATERIALS INTERNATIONAL
(2022)
Article
Chemistry, Physical
Haitao Jiang, Hui Xing, Zihan Xu, Bing Yang, Enquan Liang, Jiao Zhang, Baode Sun
Summary: In this study, the effects of high Zn content and adding Sc and Zr on aging precipitation behavior and mechanical properties in Al-Zn-Mg-Cu alloys are investigated using advanced electron microscopy techniques, XRD, tensile tests and quantitative calculations. The results show that the Al-9.2Zn-2.2Mg-2.3Cu-0.2Sc-0.15Zr alloy has higher peak strength and improved mechanical properties compared to other alloys. The addition of Sc and Zr leads to the formation of nano-structured Al3(Sc,Zr) precipitates and the precipitation of eta' phases, resulting in enhanced strength and plasticity.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Jie Tang, Jinhai Wang, Jie Teng, Guan Wang, Dingfa Fu, Hui Zhang, Fulin Jiang
Summary: Increasing Zn content in Al-Zn-Mg-Cu alloys accelerates work hardening rate but has a mixed effect on peak stress and hot deformation activation energy. Dynamic softening increases gradually with higher Zn content due to accelerated dynamic precipitation, while it decreases with low Zn content as dynamic recovery and recrystallization are hindered by Zn addition.
Article
Materials Science, Multidisciplinary
Chenglong Xu, Jiwu Huang, Fuqing Jiang, Yingge Jiang
Summary: The hot deformation behavior of a novel Sc, Zr alloyed Al-Zn-Mg-Cu alloy was studied, showing that as lnZ decreased, dislocation density decreased and the dynamic recrystallization mechanism changed.
MATERIALS CHARACTERIZATION
(2022)
Article
Chemistry, Physical
Jiongshen Chen, Li Rong, Wu Wei, Peng Qi, Meng Wang, Zezhong Wang, Li Zhou, Hui Huang, Zuoren Nie
Summary: The hot deformation behavior of Al-Zn-Mg-Er-Zr alloy was studied and a constitutive equation based on strain was established. The microstructure under different deformation conditions was analyzed. It was found that the flow stress can be described using a hyperbolic sinusoidal equation, and two types of second phases were identified in the deformed alloy.
Article
Materials Science, Multidisciplinary
Daoguang He, Han Xie, Y. C. Lin, Xin-Tao Yan, Zhengbing Xu, Gang Xiao
Summary: The high-temperature flow features of the Al Zn Mg Cu Zr aluminum alloy were investigated through hot compression tests. The evolution mechanisms of dislocation clusters, subgrain, and dynamic recrystallization (DRX) grains were thoroughly explored. It was found that high strain rate promotes the formation of dislocation clusters and subgrain nucleation/accumulation, leading to an increase in flow stress; however, at higher temperatures, the noticeable annihilation of substructures and the growth of DRX grains result in a decrease in flow stress. Three types of DRX nucleating mechanisms are activated during hot compression. The physically based (PB) model accurately predicts the true stresses and microstructure evolution features of the alloy.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Ji Ye, Qinglin Pan, Bing Liu, Zhiqi Huang, Shengqian Xiang, Longfeng Qu, Weiyi Wang, Xiangdong Wang
Summary: The quenching sensitivity of an Al-Zn-Mg-Cu alloy is mainly influenced by the precipitation of coarse eta phases during slow quenching, which increases with the size and quantity of the coarse eta phases. Two-stage aged samples exhibit lower quench sensitivity due to the reduced transformation rate from eta ' phases to eta phases after slow quenching.
JOURNAL OF MATERIALS SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Pan Deng, Wenfeng Mo, Zuoqiong Ouyang, Chenglu Tang, Binghui Luo, Zhenhai Bai
Summary: In order to develop high-strength and excellent corrosion resistance Al-Cu-Mg alloys for aircraft skins in aerospace, this study investigated the mechanical properties, corrosion behaviors, and microstructures of 2024 (Al-3.78Cu-1.27 Mg) and 2024SZ (Al-3.74Cu-1.17 Mg-0.1Sc-0.2Zr) alloys. The results show that the addition of (Sc, Zr) transformed the microstructure of the alloy, leading to improved mechanical properties and enhanced corrosion resistance. The present investigation provides a comprehensive understanding of the strengthening and corrosion mechanisms in Al-Cu-Mg alloy.
MATERIALS CHARACTERIZATION
(2023)
Article
Metallurgy & Metallurgical Engineering
Ruiqing Lu, Zhiming Xu, Fulin Jiang, Shiwei Xu, Dingfa Fu, Hui Zhang, Jie Teng
Summary: The effects of grain size on hot workability and deformation mechanisms in Mg-1.2Zn-0.2Y alloy were investigated using constitutive model, processing map, and microstructural observations. The results showed that refined grain size improves hot workability by enhancing plastic deformation homogeneity and weakening local straining around grain boundaries.
JOURNAL OF MAGNESIUM AND ALLOYS
(2023)
Article
Materials Science, Multidisciplinary
Guowei Bo, Yinlu Wang, Mingcai Liu, Jie Tang, Fulin Jiang, Jie Teng, Gang Xiao, Dingfa Fu, Hui Zhang
Summary: The complex precipitation behaviors of Al-Cu-Mg-Zr alloy were investigated, and it was found that the pre-precipitation microstructures and thermal history significantly influenced the precipitation behaviors and strengthening functions. A time-temperature-microstructure-properties map was established to reveal the precipitation characteristics. Additionally, an improved model based on in situ electrical resistivity monitoring and the classical Kampmann and Wagner type numerical model was developed, which successfully predicted the hardness evolution of the alloy during both non-isothermal and isothermal processes.
MATERIALS & DESIGN
(2022)
Article
Chemistry, Physical
Shang Xu, Fulin Jiang, Xianlu Lu, Yu Ma, Dingfa Fu, Weiyou Yang, Hui Zhang, Fengmei Gao, Shanliang Chen
Summary: This research reports the exploration of an integrated photoanode based on SiC nanohole arrays with a rationally designed amorphous carbon nanolayer. The coated carbon nanolayer acts as an efficient hole storage layer, driving the separation of photogenerated carriers. The as-fabricated SiC@C photoanode exhibits excellent photoelectrochemical water splitting properties, indicating promising applications in solar energy conversion.
Article
Engineering, Multidisciplinary
Jinlong Su, Fulin Jiang, Chaolin Tan, Fei Weng, Fern Lan Ng, Min Hao Goh, Haiming Xie, Jin Liu, Youxiang Chew, Jie Teng
Summary: A novel multi-eutectoid elements alloying approach based on thermodynamic prediction is demonstrated to achieve refined microstructure and high strength in Ti alloys. Trace eutectoid alloy elements Co, Cr, and Ni were in-situ alloyed with the Ti-6Al-4V alloy through laser-directed energy deposition, resulting in superior combination of strength and ductility.
COMPOSITES PART B-ENGINEERING
(2023)
Article
Materials Science, Multidisciplinary
Jin Liu, Zhiyong Du, Jinlong Su, Jie Tang, Fulin Jiang, Dingfa Fu, Jie Teng, Hui Zhang
Summary: The quenching-induced residual stress in ultrahigh strength Al-Zn-Mg-Cu alloys significantly affects the precipitation behavior during subsequent heat treatment and the properties of the final products. This study investigated the effects of quenching residual stress on the precipitation behavior of 7085 Al alloy through various methods, including finite element analysis and microstructural examinations. The results revealed that the reduction in residual stress increases with the increase in cladding layer thickness, and the residual stress has a significant impact on the hardness distribution. The elastic lattice distortion caused by residual stress was found to promote the nucleation of precipitates during artificial aging process. The mechanisms underlying the effect of quenching residual stress on the precipitation of 7085 Al alloy were also discussed.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Long Zhang, Ruiqing Lu, Jie Tang, Fulin Jiang, Dingfa Fu, Hui Zhang, Jie Teng
Summary: A continuously cast Al-Mg-Si-Cu alloy was processed by repetitive continuous extrusion forming (R-Conform) to refine the grain size and improve the mechanical properties. The microstructural evolution and mechanical behavior were studied through uniaxial compression deformation, finite element simulation, microstructural observation, and mechanical test. The results showed that continuous dynamic recrystallization occurred during the R-Conform process, leading to gradually refined and more uniform grain size. Solution treatment and aging further improved the mechanical properties with a tensile strength of approximately 400 MPa and an elongation of about 17.8%.
METALS AND MATERIALS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Changlong Wu, Shuang Chen, Jie Tang, Dingfa Fu, Jie Teng, Fulin Jiang
Summary: The size and distribution of ceramic particles in aluminum matrix composites significantly affect their properties. When the particle size is too small, agglomeration occurs, leading to poorer mechanical properties. If the particle size is too large, the bonding between particles and alloy is weakened, resulting in reduced mechanical properties. The impact of multi-size ceramic particles on hot workability needs further investigation.
Article
Materials Science, Multidisciplinary
Zeye Chen, Ruiqing Lu, Shuwei Zheng, Jie Tang, Fulin Jiang, Lei Deng, Liang Huang, Jie Teng
Summary: By combining special continuous expansion extrusion forming (CEEF) and various artificial aging treatments, the authors achieved improved mechanical and electrical properties in the Al-Mg-Si alloy conductors. The refined dendrites with high solid solubility in the continuous casted rods and the grain size refinement in the CEEF sheet led to simultaneous improvements in strength and conductivity. Overall, the study presents important strategies for achieving the strength and conductivity trade-off in industrial applications of Al-Mg-Si alloys conductors. Rating: 7/10.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Chemistry, Physical
Chenyu Wen, Jie Tang, Wentian Chen, Fulin Jiang, Yonggang Chen, Hui Zhang, Jie Teng
Summary: In this study, the R-Conform process combined with auxiliary thermal treatments was used to process Al-Zn-Mg-Cu alloys with poor workability. The influence of auxiliary heat treatments on grain refinement and strengthening mechanisms of Al-Zn-Mg-Cu alloys processed by R-Conform was systematically investigated. The results showed that the grains of Al-Zn-Mg-Cu alloys were significantly refined by continuous dynamic recrystallization during the R-Conform process. The processed alloys exhibited a good combination of strength and ductility due to the integrated functions of fine grains, lattice distortion, and nanosized precipitates.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Nanoscience & Nanotechnology
Tian Zhang, Jie Tang, Shudong He, Fulin Jiang, Dingfa Fu, Jie Teng, Jian Wang
Summary: We experimentally investigated the microstructure evolution and strengthening behaviors of three cold-worked austenitic steels that deform via dislocations, twinning, and stacking faults. It was found that the development of stacking faults and twins acts as kinematical barriers for dislocation motion, which is influenced by stacking fault energy and accumulated dislocations. These factors accelerate the dislocation storage rate, strengthen the alloys, and develop a high strain hardening rate. Therefore, we proposed a nonadditive strengthening equation by combining the dislocation-based two-internal-variable model coupled with kinematical barriers to rationalize the experimental observations.
SCRIPTA MATERIALIA
(2023)
Article
Chemistry, Physical
Renbao Qin, Wentian Chen, Jie Tang, Fulin Jiang, Yonggang Chen, Hui Zhang
Summary: The presence of a second phase in Al-Cu-MG alloys, which can be changed by pre-heat-treatment, significantly affects hot workability and mechanical performance. Pre-heat-treated samples showed higher resistance to deformation, better dynamic recovery, and enhanced mechanical properties compared to as-cast samples.
Article
Materials Science, Multidisciplinary
Xiankun Ji, Haiming Xie, Jinlong Su, Fulin Jiang, Jie Teng, Hui Zhang, Baoqi Guo
Summary: Post annealing treatment was conducted on laser powder bed fusion-built Ti-6Al-4V alloy to study its phase transformation behaviors and dislocation evolutions. The results showed that post annealing treatment effectively decomposed martensitic and α' phases and eliminated dislocations. The martensite decomposition rate increased with the annealing temperature. Annealing at 700°C for 4 hours eliminated 98% of the dislocations, and further annealing had limited influence on the dislocation density. Annealing at 700°C for 16 hours resulted in a high ductility of 10.3% due to the favorable equilibrium lamellar α+β microstructure. These findings provide valuable insights for optimizing post annealing treatment procedures to enhance the mechanical properties of additively manufactured Ti-6Al-4V alloys.
Article
Chemistry, Physical
Zhengfeng Zhu, Renbao Qin, Yishan Sun, Jie Tang, Fulin Jiang, Chuang You
Summary: Extrusion speed has a significant influence on the extrusion temperature, microstructure, and mechanical properties of the material in the RCEF process. By adjusting the speed and applying subsequent heat treatment, the mechanical properties of Al2024 were improved. Increasing the extrusion speed from 4 to 8 rpm enhanced the extrusion temperature and solid solution function. A high-strength Al2024 with good elongation was obtained by increasing the extrusion speed and conducting solid solution and artificial aging treatments, attributed to finer grain size and a larger amount of S (Al2CuMg) precipitates.
Article
Chemistry, Physical
Shuang Chen, Changlong Wu, Guowei Bo, Haiyang Liu, Jie Tang, Dingfa Fu, Jie Teng, Fulin Jiang
Summary: The particle size of SiC significantly affects the hot workability of SiCp/6013 composites. Smaller SiC particle sizes lead to higher peak stress and larger instability zones.
Article
Optics
Su Jinlong, Chen Lequn, Tan Chaolin, Chew Youxiang, Weng Fei, Yao Xiling, Jiang Fulin, Teng Jie
Summary: The application of machine learning (ML) technology in additive manufacturing (AM) is of great significance. ML can accelerate the development and optimization of AM processes, optimize the preparation of alloys, and enable the development of high-performance alloys.
CHINESE JOURNAL OF LASERS-ZHONGGUO JIGUANG
(2022)
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)
