Article
Chemistry, Physical
Xuejian Lin, Hongjun Huang, Xiaoguang Yuan, Yinxiao Wang, Bowen Zheng, Xiaojiao Zuo, Ge Zhou
Summary: The high-temperature deformation behavior and dynamic recrystallization kinetics model of Ti-47.5Al-2.5V-1.0Cr-0.2Zr alloy were studied. The results show that the rheologic stress corrected by friction is less than the experimental stress value, indicating a negative effect of interface friction on stress. The influence of deformation heat on stress is significant.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Bo Li, Han Yang, Zhaojie Chu, Yong Du
Summary: The microstructure evolution and hot deformation behavior of CrFeCoNiAl0.1 high entropy alloy were studied. The Arrhenius-type constitutive equation and kinetic model of dynamic recrystallization (DRX) were constructed. The experimental results showed good agreement with the predicted results, validating the DRX volume fraction model of CrFeCoNiAl0.1 high entropy alloy.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(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
J. S. Behra, A. Thiriez, D. Truzzolillo, L. Ramos, L. Cipelletti
Summary: This paper proposes a new system to effectively control the proportion of particles in a colloidal suspension by changing the volume of hydrogel spheres. The study shows that the system exhibits similar glass transition and dynamic behavior as silica nanoparticle suspensions with different particle ratios.
JOURNAL OF CHEMICAL PHYSICS
(2022)
Article
Engineering, Aerospace
Yanxia Niu, Yan Shi, Xuelin Zhao, Qichi LE, Yixuan Wang, Shuai Ren, Na Wang
Summary: Uniaxial hot compression experiments were conducted to understand the dynamic recrystallization behavior of as-cast AZ12 magnesium alloy during deformation. The experiments involved thermal compression with a true strain of 50% at temperatures ranging from 200 to 400 degrees C and strain rates of 0.001 to 1 s-1. A dynamic recrystallization (DRX) kinetic model was established for AZ12 magnesium alloy and its accuracy was verified. The model was used to predict the volume fraction of the sheet obtained through rolling under a consistent total reduction of 50%, and the predicted results showed good agreement with the experimental results.
CHINESE JOURNAL OF AERONAUTICS
(2023)
Article
Chemistry, Physical
Abdul Malik, Umer Masood Chaudry, Tan Yan, Jianyu Long, Chuan Li, Yangwei Wang
Summary: In this study, the reorientation of texture and improvement of mechanical properties in ZK61-T6 and ZK61-PC magnesium alloys were achieved through cross pre-compression. The results showed that the compressive yield strength, ultimate compressive strength, and elongation to fracture were significantly increased. The microstructure evolution revealed the propensity and width of adiabatic shear band and the role of twinning, de-twinning, and dislocation in absorbing high-stress energy. The twinning-induced rotational dynamic recrystallization mechanism contributed to the development of fine grains. Based on the findings, pre-compression is recommended as a practical approach to enhance the efficiency of ZK61 magnesium alloy.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Engineering, Multidisciplinary
Jiamin Zhang, Xiaochen Wang, Dong Xu, Quan Yang, Jianwei Zhao, Renjie Xue
Summary: In this study, samples with different microstructural characteristics were obtained and the volume fraction was calculated using image processing software. The signals from laser ultrasonic experiment were analyzed to establish a prediction model for phase volume fraction.
Article
Materials Science, Multidisciplinary
Ru Su, Jixiao Li, Dayong Wu, Fuhong Hu, Xueze Liang, Qingyuan Shen, Wenguang Tian, Yalong Wang, Haikun Ma, Balaji Narayanaswamy, Huicong Dong, Qian Wang
Summary: This study aims to determine the optimum technological parameters for hot forging of aerospace bolts. The deformation behavior and microstructure evolution of Waspaloy were studied at various temperatures and strain rates. The flow stresses were found to be sensitive to the deformation parameters, with higher stresses at lower temperatures or higher strain rates. Grain refinement was the main mechanism for microstructural evolution at low temperatures, while grain growth was dominant at high temperatures. Models were established to describe the flow characteristic and DRX kinetic of Waspaloy. The simulation results matched well with the experimental results, providing guidance for optimizing technological parameters and predicting microstructure.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Metallurgy & Metallurgical Engineering
Liu-wei Zheng, Yong-peng Zhuang, Jun-jian LI, Hong-xia Wang, Hang LI, Hua Hou, Li-fei Wang, Xiao-ping Luo, Kwang Seon Shin
Summary: The effect of Nd addition on the microstructure and mechanical properties of as-extruded Mg-9Gd-0.5Zr alloy is investigated. Nd addition results in the disappearance of elongated non-dynamic recrystallized grains and the formation of uniformly distributed dynamic recrystallized grains. In addition, the precipitation of nano-Mg5(Gd,Nd) particles enhances the strength and ductility of the alloy.
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
(2022)
Article
Materials Science, Multidisciplinary
Xingwang Duan, Min Wang, Xin Che, Linfeng He, Jiachen Liu
Summary: The dynamic recrystallization (DRX) behavior of the extruded AZ80A magnesium alloy during plastic deformation was studied using the physical-based finite element (FE) method and the developed cellular automata (CA) model. Isothermal compression tests were conducted to obtain the flow stress-strain curves. A constitutive model and a DRX model were established based on the analysis of the experimental data. These models were embedded in DEFORM-3D software for simulation of the grain evolution. The combined method showed good prediction results and verified its potential.
JOURNAL OF MATERIALS SCIENCE
(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
Materials Science, Multidisciplinary
Kuizhao Wang, Cunsheng Zhang, Zijie Meng, Zinan Cheng, Liang Chen, Guoqun Zhao
Summary: This study investigates the effects of precipitation on the recrystallization behavior of an Al-Cu-Li alloy during compression by designing different alloys with varying pre-precipitations through heat treatment processes. The results show that precipitation significantly affects the recrystallization volume fraction without changing the recrystallization mechanism. Additionally, different extruded texture fibers coordinate deformation through different softening mechanisms and stimulate the nucleation of lamellar grain in R-cube textures.
MATERIALS & DESIGN
(2022)
Article
Chemistry, Physical
Wenwei Zhang, Qiuyue Yang, Yuanbiao Tan, Ya Yang, Song Xiang, Fei Zhao
Summary: The dynamic recrystallization (DRX) behavior of 47Zr-45Ti-5Al-3V alloy was studied using experimental and numerical simulation methods. Results showed a strong dependence of DRX behavior on hot-working parameters, with established kinetics models for DRX grains and accurate simulation using cellular automata (CA) comparing with finite element simulation (FEM).
Article
Materials Science, Multidisciplinary
Xiaoru Zhuo, Haichao Xu, Yuna Wu, Zhichao Hu, Jinghua Jiang, Aibin Ma
Summary: The flow behavior of three near eutectic Al-Si alloys with different average eutectic Si sizes was investigated by isothermal compression tests. It was found that the eutectic Si size affects not only the flow behavior but also the processing map of the alloys. The strain-compensated constitutive equations depend on eutectic Si size and the processing maps of the alloys exhibit different characteristics.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Chemistry, Physical
Rui Luo, Leli Chen, Yuanxiang Zhang, Yu Cao, Ching-Tun Peng, Yuyan Yang, Tian Liu, Qi Zheng, Xiaonong Cheng
Summary: The thermal-mechanical experiments on a newly developed Fe-Cr-Ni-Al-Nb superalloy revealed that higher temperature, lower strain rate, and larger true strain were favorable for dynamic recrystallization. The study also identified three stages during dynamic recrystallization and three different mechanisms for the process.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)