Article
Chemistry, Physical
Jiashu Wei, Fang Yang, Miao Qi, Chenzeng Zhang, Cunguang Chen, Zhimeng Guo
Summary: The hot deformation behavior and microstructural evolution of powder metallurgy (PM) Ti-6Al-4V were investigated using various methods, including the Arrhenius constitutive model, hot processing map, microstructure observation, and hot deformation mechanism analysis.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Hua Wang, Dengfeng Yin, Ming-Chun Zhao, Yan Tian, Andrej Atrens
Summary: Hot deformation behavior and associated microstructural evolution in a quaternary Al-Cu-Li-Zn alloy were studied under different deformation conditions. The study found that dynamic recrystallization (DRX) was influenced by grain orientation and particle simulated nucleation (PSN) was the primary mechanism of DRX. Additionally, only a small fraction of DRX grains appeared under certain temperature and strain rate conditions.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Chemistry, Physical
Jinlong Su, Xiankun Ji, Haiming Xie, Jie Tang, Fulin Jiang, Dingfa Fu, Jie Teng, Hui Zhang
Summary: The flow behaviors and microstructural evolutions during multi-stage hot deformation of a near-alpha Ti-5Al-2.5Sn alloy were studied. It was observed that the flow stress and restoration fraction in the alpha + beta phase region were lower in the non-isothermal multi-stage deformation compared to isothermal multi-stage deformation. Clear transitions were observed between different phase regions during the non-isothermal multi-stage deformation. Additionally, a dynamic phase transformation and the formation of FCC-Ti precipitations were observed during deformation.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Meng Li, Zhang-Zhi Shi, Qiang Wang, Yang Cheng, Lu-Ning Wang
Summary: This study reveals the constitutive equation and dynamic recrystallization behavior of environmentally degradable Zn-0.8Mn alloy, obtains a processing map for the alloy, and discovers its excellent hot formability. During hot compressions, discontinuous DRX is identified as the main mechanism, twinning-induced DRX is completely suppressed at 300 degrees C and above, and particle stimulated nucleation comes from dispersed MnZn13 particles. Furthermore, the alloy exhibits elevated-temperature strengths better than pure Zn and Zn-Al-based alloys.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Chemistry, Physical
Shuai Long, Dao-xiang Wu, Shu-yan Wang, Yu-peng Jiang, Run-ze Xia, Shi-shan Li, Yu-ting Zhou, Peng Peng, Qing-wei Dai
Summary: The flow behavior and thermal expansion behavior of a homogenized Al-Cu-Li alloy were investigated through quenching expansion tests and isothermal compression tests. It was found that the temperature rise dissolves coarse secondary phases and increases the coefficient of thermal expansion. Different constitutive models were evaluated, with the two-step optimized Johnson-Cook model showing the highest precision in predicting the material behavior.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Dao-Guang He, Gang Su, Yong-Cheng Lin, Yu-Qiang Jiang, Zhou Li, Zi-Jian Chen, Xin-Tao Yan, Yu-Chi Xia, Yang-Chen Xie
Summary: The study examined the microstructural variation and high-temperature flow features of a Ti-55511 alloy in the beta region using double-stage compression with a stepped strain rate. The results showed that stresses decreased significantly as strain or strain rate decreased, leading to the promotion of substructure annihilation/interaction and refinement of dynamic recrystallization in the beta grain. However, coarsening of beta grain and consumption of dislocation substructures accelerated at high temperatures.
Article
Nanoscience & Nanotechnology
Qian Zhang, Quanan Li, Xiaoya Chen, Jian Bao, Ziyi Chen
Summary: The addition of Sn in Mg-Gd-Y-Sn-Zr alloys promotes dynamic precipitation, dynamic recrystallization, and inhibits the formation of high-angle grain boundaries. At different temperature and strain rate conditions, there is a competitive relationship between dynamic recrystallization and flow stress reduction.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Chemistry, Physical
Yu-Qiang Jiang, Y. C. Lin, Guan-Qiang Wang, Guo-Dong Pang, Ming-Song Chen, Zhi-Chao Huang
Summary: The microstructure evolution of a Ti-55511 alloy deformed at high temperatures and wide strain rate range was studied, and a unified constitutive equation was established to describe the evolution of flow stress, grain size, and dynamic recrystallization fraction. Experimental results showed different structures were formed within the alloy under different deformation conditions, with DRX fraction and sub-grain size changing with increasing deformation temperature and strain rate.
JOURNAL OF ALLOYS AND COMPOUNDS
(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
Chemistry, Physical
Kai Wang, Xuetao Zou, Guanyu Huang, Run Zhang, Kangbo Yuan, Xiaohu Yao
Summary: The abundant strengthening mechanisms in MEAs endow them with excellent comprehensive properties. In this study, the mechanical behaviors and micro deformation mechanisms of a CoCrNiSi0.2 MEA were investigated under different strain rates. It was found that the volume fraction of phase transformation increased significantly with the increasing strain rate, leading to a stronger precipitation-strengthening effect. This strain-rate-strengthening effect should not be ignored in constitutive modeling.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Nanoscience & Nanotechnology
Mingjie Zhao, Liang Huang, Changmin Li, Jianjun Li, Pengchuan Li
Summary: The flow behaviors of 300M steel were studied through hot compression experiments, and a modified constitutive model was established to accurately quantify the flow behaviors. The microstructure evolution mechanism was analyzed and the deformation parameters were optimized to improve the microstructure of the alloy. The power dissipation efficiency was identified as a key index to evaluate the DRX degree and flow instability of 300M steel.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
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
Ke Wang, Yongqing Zhao, Weiju Jia, Silan Li, Chengliang Mao
Summary: Isothermal compressions were conducted on as-cast near-alpha Ti90 titanium alloy to study its deformation behavior at different temperatures and strain rates. The results showed that the kinking and dynamic globularization of alpha lamellae were the dominant softening mechanisms in the alpha + beta two-phase region, while the dynamic recovery of beta phase was the main softening mechanism in the beta single-phase region. The activation of prismatic and pyramidal slip was found to be easier than basic slip in the alpha + beta two-phase region.
Article
Materials Science, Multidisciplinary
Jie Mi, Deqing Ma, Shiyu Luan, Peipeng Jin, Lijia Chen, Xin Che, Xiaoqiang Li
Summary: The microstructure and texture evolutions of the Mg-2Zn-0.5Mn-0.2Ca-0.3Nd-0.7La alloy during hot compression tests were investigated. The thermal deformation behavior of the alloy followed a hyperbolic sine function relationship, and a thermal processing map was constructed based on a dynamic material model. The alloy exhibited discontinuous dynamic recrystallization (DDRX) mechanism, with extension twins forming a new texture.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Chemistry, Physical
Daoguang He, Shibing Chen, Yongcheng Lin, Xintao Yan, Guan Liu
Summary: Isothermal deformation experiments were conducted on Hastelloy C276 alloy to analyze its microstructural evolution mechanisms. The study revealed that the hot compression parameters had a significant impact on the alloy's microstructure variation features and flow behaviors. The strain rates influenced the strain hardening effects, while the compressed temperature affected the true stresses through the annihilation of substructures and dynamic recrystallization behaviors.
Article
Automation & Control Systems
Rong Zeng, Fei Ma, Liang Huang, Jianjun Li
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2015)
Article
Materials Science, Multidisciplinary
Rong Zeng, Liang Huang, Hongliang Su, Huijuan Ma, Yangfei Ma, Jianjun Li
Article
Chemistry, Physical
Xianlong Liu, Liang Huang, Hongliang Su, Fei Ma, Jianjun Li
Article
Materials Science, Multidisciplinary
Hui Zhu, Liang Huang, Zeyu Wang, Jianjun Li, Huijuan Ma, Hongliang Su
JOURNAL OF MATERIALS SCIENCE
(2019)
Article
Automation & Control Systems
Jiahui Xu, Liang Huang, Xiudong Hong, Xianlong Liu, Hongliang Su, Fei Ma, Jianjun Li
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2020)
Article
Materials Science, Multidisciplinary
Fei Feng, Jianjun Li, Yunjun Zhang, Liang Huang, Hongliang Su, Shijing Cao, Guangbao Shao, Rongchuang Chen
Article
Chemistry, Physical
Xuwen Deng, Songxiao Hui, Wenjun Ye, Rui Liu, Liang Huang
Summary: In this study, the hot deformation behavior of Ti-6Al-4V profile prepared by hot extrusion was investigated. The coupled thermo-mechanical model of hot twist-stretch straightening was established and the effects of process parameters on the bending deflection and torsion angle were systematically studied and optimized. The results showed that the straightening accuracy can meet the requirements by using the optimized process parameters.
Article
Metallurgy & Metallurgical Engineering
Mingjie Zhao, Liang Huang, Changmin Li, Yang Su, Shiqi Guo, Jianjun Li, Chaoyuan Sun, Pengchuan Li
Summary: In this study, the deformation behaviors of 300M steel under large strain were investigated through hot compression experiments. A novel constitutive model was proposed to predict the flow stress at different deformation parameters. The results showed that the newly proposed constitutive model accurately described the variations of flow stress and outperformed other existing constitutive models in terms of prediction accuracy.
STEEL RESEARCH INTERNATIONAL
(2023)
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.