Article
Materials Science, Multidisciplinary
Chen Li, Zhuo Chen, Xin-Quan Zhang, Wen-Long Xiao, Yue Ma
Summary: This study investigated the hot deformation behavior and microstructural evolution of as-homogenized 7A65 Al alloy under isothermal compression. It was found that the flow stress exhibited a typical dynamic recovery characteristic at high-temperature deformation conditions, and a constitutive equation was proposed to describe the flow behavior. The hot processing map was established, and the optimal processing conditions were determined. Deformation temperature and strain rate had a significant effect on the microstructure evolution, with the main softening mechanism being dynamic recovery, but dynamic recrystallization was enhanced with the increase in temperature.
Article
Materials Science, Multidisciplinary
Wei-Hsun Liao, Che-Wei Tsai, Yu-Chih Tzeng, Woei-Ren Wang, Chi-San Chen, Jien-Wei Yeh
Summary: The hot deformation behavior of equimolar CoCrFeNi HEA was investigated through hot compression, and processing maps were constructed using a dynamic materials model. The experimental results were consistent with the contour map, indicating a well-deformed region at 1223 K and 10-3 s-1 with a power dissipation parameter of 0.3.
MATERIALS CHARACTERIZATION
(2023)
Article
Materials Science, Multidisciplinary
Fuwei Kang, Jinlong Lu, Enhao Wang, Bing Wang, Shangzhuo Li, Xianyong Wang, Wei Jiang
Summary: This paper conducted an isothermal thermal compression simulation test on 2024 aluminum alloy. The experimental results show that the change of flow stress is inversely proportional to the deformation temperature, but directly proportional to the strain rate. Observations of the microstructure after thermal deformation indicate the formation of recrystallization and the decrease of dislocation density, which is the main reason for dynamic softening. The thermal deformation activation energy of 2024 aluminum alloy is 201.62 kJ/mol. The hot working diagram of 2024 aluminum alloy was established, with the ideal deformation conditions being a deformation temperature of 573-673 K and a strain rate of 0.01-0.1 s(-1).
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2023)
Article
Materials Science, Multidisciplinary
Bo Li, Yonghua Duan, Shanju Zheng, Mingjun Peng, Mengnie Li, Hengyong Bu
Summary: Hot compression tests were conducted to evaluate the hot deformation behavior of 60Mg-30Pb-9.2Al-0.8B alloy. The Arrhenius constitutive equation and processing map with strain compensation were established based on the dynamic material model. The results showed three stages in the stress-strain curves during hot compression, with characteristics of work hardening, dynamic recovery, and dynamic recrystallization. The improved Arrhenius strain compensation constitutive model had higher precision than the traditional model. Optimum hot working parameters were determined based on the analysis of the processing map.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Ali Shabani, Mohammad Reza Toroghinejad, Marieh Aminaei
Summary: The hot deformation behavior of FeCrCuMnNi high entropy alloy was studied through hot compression tests in the temperature range of 500-970 degrees C and strain rates of 0.1, 0.01, and 0.001 s-1 up to a strain of 0.6. An Arrhenius-type equation was used to evaluate the deformation behavior and propose a constitutive equation. The alloy exhibited typical hot deformation behavior with an activation energy of approximately 250 kJ/mol, mainly governed by Cu lattice diffusion. Discontinuous dynamic recrystallization (dDRX) was the main restoration phenomenon, with grain boundary sliding and dislocation sliding as the main active mechanisms. Processing maps based on energy efficiency (η) and flow instability (ξ) were plotted, revealing an instability region between 750 and 850 degrees C at different strain rates, which might be directly related to the formation of a hard sigma phase within this temperature range.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Jiaxin Yu, Zijiong Li, Cheng Qian, Sheng Huang, Han Xiao
Summary: A new near-a Ti alloy (Ti-0.3Mo-0.8Ni-0.5Al-0.5Zr) was developed by adding Al and Zr elements to the TA10 alloy, which enhanced the mechanical properties. The deformation mechanism and constitutive model of the alloy were investigated, and a hot processing map was established.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
D. Mirahmadi, K. Dehghani, A. Shamsipur, A. Kalaki
Summary: The hot deformation characteristics of Cu-2Be alloy were studied between the temperatures of 650-950 degrees C and strain rates of 0.001-1 s-1. A constitutive analysis and adaptive-network-based fuzzy inference system (ANFIS) were used to accurately predict the hot deformation behavior. The results showed that the optimal hot deformation conditions for the alloy were at temperatures of 850-950 degrees C and strain rates of 1-10 s-1, leading to a more uniform and fine grain structure due to discontinuous dynamic recrystallization (DDRX).
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Jingqi Zhang, Xinyu Xu, Jiayu Xue, Sinong Liu, Qinghua Deng, Feng Li, Jie Ding, Hui Wang, Hui Chang
Summary: The hot deformation behavior and microstructure evolution mechanism of TC19 titanium alloy were studied. The flow behavior of the alloy and its hot processing map were predicted using experimental and modeling analysis. It was found that the deformation mechanism was mainly controlled by the deformation rate, leading to different deformation mechanisms and grain structures at different deformation rates.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Materials Science, Multidisciplinary
Andong Wang, Yongquan Mao, Caifeng Chen, Luxiang Zhang, Lei Ni
Summary: The optimal processing parameters for Ti-5322 alloy are found to be specific temperature and strain rate ranges, with the effects of dynamic recrystallization and spheroidization behavior. The instability subgrain boundaries in hot deformation can cause α phase spheroidization, along with the presence of three instability domains in the processing maps.
MATERIALS RESEARCH EXPRESS
(2021)
Article
Materials Science, Multidisciplinary
Jinna Mei, Tiandong Wu, Na Wei, Fei Xue, Zhen Cai, Xiangyi Xue
Summary: This study investigated the flow behavior of a novel high entropy alloy through isothermal compression experiments. The alloy exhibited a typical single-peak flow curve and the deformation was non-uniform due to the plastic incompatibility of its two phases. Continuous dynamic recrystallization occurred in both phases, with easier recrystallization in the BCC phase. Low temperature and high strain rate were beneficial for grain refinement.
Article
Chemistry, Physical
G. Sukumar, B. Bhav Singh, I. Balasundar, Amit Bhattacharjee, V. Subramanya Sarma
Summary: The hot deformation characteristics of Ti-4Al-2.5V-1.5Fe-0.25O alloy in different conditions were studied through isothermal hot compression tests. Various methods such as strain rate sensitivity, kinetic analysis, and microstructural characterization were used to understand the deformation behavior and identify the optimal regime for primary breakdown. The results showed different deformation mechanisms in the beta and alpha + beta fields at different strain rates, and the optimal thermomechanical processing conditions were determined through a combination of strain rate sensitivity map and microstructural analysis. Constitutive equations were also developed to predict the flow stress values in different fields.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Jinyu Wang, Jiajun Zhao, Yuhao Jia, Xiaoguang Fan, Feng He, Xian Luo, Junjie Li, Zhijun Wang, Jincheng Wang
Summary: This study investigated the hot deformation behavior of the Ni61Fe10Cr10Al17Mo2 alloy and revealed the relationship between flow stress and deformation temperature and strain rate. Constitutive equations were constructed to describe this relationship. A hot processing map was created using a dynamic material model and instability criterion. The deformed microstructures and dynamic recrystallization of the alloy were also investigated. An optimal processing route was obtained based on the processing map.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Yaqin Yang, Yunfang Liu, Xintao Guo, Caihong Yin, Jianmin Yu, Zhimin Zhang, Huagui Huang
Summary: This study systematically investigated the hot deformation behavior, microstructure, and texture evolution of Mg-9Li-1Zn (LZ91) alloy, and developed the best Arrhenius hot deformation constitutive equation model and processing map for the alloy. The results showed that the hot deformation behavior of the LZ91 alloy can be accurately predicted using the Arrhenius constitutive equation. The alloy exhibited instability in specific temperature and strain rate ranges, and the microstructure revealed deformation through the cooperation of different slip systems, resulting in a gradient increase in hardness due to grain refinement and texture.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Ding-ge Fan, Kun-kun Deng, Cui-ju Wang, Kai-bo Nie, Quan-xin Shi, Wei Liang
Summary: The addition of trace SiCp reduces the activation energy of the Mg-5Zn alloy, and the optimal deformation conditions were determined based on the processing map. The study also looked at the influence of PDZ size on the activation energy, as well as the effect of SiCp on the dynamic recrystallization behavior.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Metallurgy & Metallurgical Engineering
Bin Zhang, Ying Dong, Raja Devesh Kumar Misra, Yue Liu, Chao Sun, Lin Xiu Du
Summary: The study shows that the flow stress of the novel TRIP alloy increases with decreasing deformation temperature and increasing strain rate, with optimum hot deformation conditions identified at 1273 K and 0.8 s(-1). Transmission electron microscope (TEM) observations reveal the presence of two dynamic recrystallization mechanisms - CDRX and SIBM.
STEEL RESEARCH INTERNATIONAL
(2021)
Article
Computer Science, Artificial Intelligence
Y. C. Lin, Dong-Dong Chen, Ming-Song Chen, Xiao-Min Chen, Jia Li
NEURAL COMPUTING & APPLICATIONS
(2018)
Article
Materials Science, Multidisciplinary
Dong-Dong Chen, Zhou-Shun Zheng, Jian-Zhong Wang, Hui-Ping Tang
Article
Chemistry, Physical
Dong-Dong Chen, Y. C. Lin, Ying Zhou, Ming-Song Chen, Dong-Xu Wen
JOURNAL OF ALLOYS AND COMPOUNDS
(2017)
Article
Materials Science, Multidisciplinary
Y. C. Lin, Hui Yang, Xiao-Min Chen, Dong-Dong Chen
ADVANCED ENGINEERING MATERIALS
(2018)
Article
Nanoscience & Nanotechnology
Y. C. Lin, Wen-Yong Dong, Mi Zhou, Dong-Xu Wen, Dong-Dong Chen
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2018)
Article
Materials Science, Multidisciplinary
Y. C. Lin, Fan Wu, Qian-Wei Wang, Dong-Dong Chen, Swadesh Kumar Singh
Article
Materials Science, Multidisciplinary
Dao-Guang He, Y. C. Lin, Jian Chen, Dong-Dong Chen, Jian Huang, Yi Tang, Ming-Song Chen
MATERIALS & DESIGN
(2018)
Article
Materials Science, Multidisciplinary
Y. C. Lin, Jian Huang, Hong-Bin Li, Dong-Dong Chen
Article
Materials Science, Multidisciplinary
Qian-Wei Wang, Y. C. Lin, Yu-Qiang Jiang, Xin-Gang Liu, Xiao-Yong Zhang, Dong-Dong Chen, Chao Chen, Ke-Chao Zhou
MATERIALS CHARACTERIZATION
(2019)
Article
Materials Science, Multidisciplinary
Houping Dai, Dongdong Chen, Zhoushun Zheng
Article
Materials Science, Multidisciplinary
Chengbo Li, Dongdong Chen
Article
Computer Science, Artificial Intelligence
Hou-Ping Dai, Dong-Dong Chen, Zhou-Shun Zheng
Article
Materials Science, Multidisciplinary
Song Min, Zheng Zhoushun, Chen Dongdong, Tang Huiping, Wang Jianzhong
RARE METAL MATERIALS AND ENGINEERING
(2017)
Article
Materials Science, Multidisciplinary
Chen Dongdong, Zheng Zhoushun, Wang Jianzhong, Tang Huiping
RARE METAL MATERIALS AND ENGINEERING
(2017)
Article
Materials Science, Multidisciplinary
Ping Zhang, Xiujie Yue, Yeran Gao, Zhenyong Lin, Shunxiang Wang, Songting Zhang
Summary: This paper investigates the strengthening mechanism of highspeed cutting and solid particle-entrained waterjet peening (HSC-WJP) composite reinforcement on 7075-T6 aluminum alloy. The research results show that composite reinforcement can improve surface quality, reduce surface pits and roughness, and decrease the size of precipitation-free zone (PFZ) at grain boundaries.
Article
Materials Science, Multidisciplinary
Sangyoon Lee, Hwi Yoon, Sanghun Lee, Seung-min Chung, Hyungjun Kim
Summary: The wettability of metal oxides, particularly HfO2 thin films deposited via atomic layer deposition, and its correlation with surface free energy have been studied. It was found that surface oxygen species significantly affect the intrinsic hydrophilicity of HfO2 thin films, and the crystalline orientations also evolve with film thickness.
Article
Materials Science, Multidisciplinary
Changdong Yin, Yiwen Wu, Zhou Xu, Dongdong Ye, Jun Yao, Jianjun Chen, Qiang Liu, Xin Ge, Meiling Ding
Summary: This study proposed a new strategy to indirectly estimate the hydrogen diffusivity of metallic materials under tensile stress by combining the electrochemical hydrogen permeation test (EHPT), the hydrogen diffusion descriptive equation based on Fick's law, and hydrogen pre-charged tensile test. The results showed that the hydrogen permeation curve obtained was highly approximate to the theoretical trend. The hydrogen embrittlement (HE) susceptibility of the specimens increased with increasing stress.
Article
Materials Science, Multidisciplinary
Huan Luo, Wei-yi Wang, Xin Yu, Xian-jun Lei, Lang Liu, Guo-zheng Zha, Wen-long Jiang, Bin Yang, Bao-qiang Xu
Summary: Separating selenium and tellurium is a general challenge in material and non-ferrous metallurgical industries. This paper proposes a novel method that achieved efficient separation of selenium and tellurium using gas-liquid equilibrium phase diagram and valence regulation-vacuum gasification technique.
Article
Materials Science, Multidisciplinary
Fan Zhang, Rong Xin Wang, Aiqin Tian, Fangzhi Li, Jianping Liu, Hui Yang
Summary: Deposition of Pd/Pt/Au three-layer films on p-GaN under high and ultra-high vacuum conditions was studied to investigate the electrical contact properties. Linear I-V curves were observed in samples deposited under ultra-high vacuum conditions, while nonlinear I-V characteristics were obtained in samples deposited under high vacuum conditions. The study also found that the samples deposited under high vacuum conditions had higher amounts of oxygen and Pd oxide. The oxide layer had an additional influence on the electrical characteristics of the Pd/Pt/Au/p-GaN contact.
Article
Materials Science, Multidisciplinary
Hongli Liu, Chengzhe Liu, Ying Sui, Zhongxian Liu, Tiangang Zhang, Zhiqiang Zhang, Shuang Sun, Jianwei Jia
Summary: This study utilized polysiloxane and hafnium carbide to produce Si-N-C-O-Hf hybridized ceramic fibers, and obtained ceramic fibers with hemispherical particles on the surface through electrostatic spinning and pyrolysis. The ceramic fibers exhibited excellent thermal stability, oxidation resistance, and high temperature insulation.
Article
Materials Science, Multidisciplinary
M. Abaker, Nazar Elamin Ahmed, A. Saad, H. F. Khalil, E. M. M. Ibrahim, A. M. Adam
Summary: This paper systematically studied the internal structure and thermoelectric properties of In1-xGaxSb alloys prepared by melting synthesis at 1123 K. The results showed that doping with Ga in the In sites led to a significant increase in the Seebeck coefficient and power factor, while reducing the thermal conductivity. The maximum dimensionless figure of merit was observed at 403 K.
Article
Materials Science, Multidisciplinary
Fucheng Yu, Jinlong Ren, Jielin Zhang, Haiyang Chen, Xin Tian, Chenchen Feng, Cuixia Li, Jianbin Zhang, Xianxi Tang, Xiaogang Hou
Summary: An environmentally friendly ZnO@BiVO4 composite photocatalyst was prepared using in-situ self-assembly and solvothermal methods, demonstrating good photocatalytic performance. The mass ratio of BiVO4 and NCZ was found to influence the photocatalytic performance of the composite.
Article
Materials Science, Multidisciplinary
Yaoming Shao, Pingping Zheng, Tianhao Dong, Lianghuan Wei, Haifei Wu, Jianxiao Si
Summary: In this paper, Mg3Bi2 films were prepared on glass substrate using magnetron sputtering, and the phase composition and thermoelectric properties of the films were investigated with different atomic ratios. The films displayed a metastable cubic phase and high conductivity when the atomic ratio exceeded stoichiometry.
Article
Materials Science, Multidisciplinary
I. V. Uimanov, D. L. Shmelev, S. A. Barengolts
Summary: A two-dimensional axisymmetric model has been developed to study the prebreakdown processes in a cathode microprotrusion under an external electric field. The simulation results show that electrohydrodynamic instability leads to the formation of a nanometer-sized conical protrusion on the microprotrusion tip, significantly accelerating the heating process.
Article
Materials Science, Multidisciplinary
Weilun Zhang, Di Yang, Feng Gong, Yongjun Chen, Tian Chen, Zhiwen Xie, Sirui Yang
Summary: A novel Pt doping method was designed to improve the thermal stability of CrWN coating. The doping of Pt atoms effectively blocks the coherent growth of the grains and creates a significant mixing effect, resulting in a smooth surface with uniform element distribution.
Article
Materials Science, Multidisciplinary
Xiaoye Wang, Xiaoguang Yang, Wenna Du, Tao Yang
Summary: In this study, the effects of multiple growth parameters on self-catalyzed growth of InAs/GaSb axial heterostructured nanowires on Si substrate by MOCVD were investigated. It was found that the growth temperature and switching time have significant influences on the nanowire growth.
Article
Materials Science, Multidisciplinary
Weizhong Cui, Yan Zhao, Can Cui, Xing Liu, Beili Pang, Jianguang Feng, Hongzhou Dong, Liyan Yu, Lifeng Dong
Summary: This study introduces Co2+ cations into Cs2AgBiBr6 film to improve its quality, grain size, and conductivity, resulting in enhanced solar cell efficiency.
Article
Materials Science, Multidisciplinary
Jian Wang, Ke Yang, Xianming Cheng, Yalin Lu, Ganghui Wu, Yang Zhang, Yun Kan
Summary: The corrosion behavior and microstructural evolution of Sc microalloyed Al-3.2Cu-1.5Li alloys were investigated in detail. The microstructural results showed higher levels of dislocations density in the Sc microalloyed sample, which resulted in significantly refined grains and T1 precipitates. Microalloying with Sc changed the corrosion mode of the alloy and localized corrosion was found to occur preferentially at the subgrain within unrecrystallized grains with high grain stored energy.
Article
Materials Science, Multidisciplinary
Weifeng Liu, Na Liu, Kaiqiang Song, Meiqin Zeng, Zhongchen Lu
Summary: Monoclinic WO3 prepared through plasma milling exhibits higher photocatalytic activity due to its higher surface area, increased oxygen vacancies, and defects.
