论文摘要
The hot deformation behavior of pure nickel with coarse,columnar grains in the temperature range of 950-1150℃ at intervals of 50℃ and in the strain rate range of 0.001-10.000 s-1 at intervals of one order of magnitude was investigated by isothermal hot compressive testing with the compression ratio of 70%.The results reveal that the strain rate and the temperature strongly affect the flow stress during hot deformation and that flow stress increases with the increase in strain rate while decreases with temperature increasing.Moreover,the relationship among flow stress,strain rate and temperature can be represented by the Zener-Hollomon parameter with the calculated apparent activation energy of 312.403 kJ ·mol-1,and the variation of activation energy is sensitive to strain rate rather than temperature.In addition,the dynamic recrystallization（DRX）analysis reveals that the DRX behavior of nickel is evidently affected by both deformation temperature and strain rate and that the distinct mechanisms of nucleation are the bulging of serrated grain boundaries and the development of twinning.
论文目录
文章来源
类型: 期刊论文
作者: Wen-Li Gao,Shi-Zhen Lai,Jie Teng,Zhen-Tao Du,Xue-Sheng Liu,Yao-Wei Chang
来源: Rare Metals 2019年07期
年度: 2019
分类: 工程科技Ⅰ辑
专业: 金属学及金属工艺
单位: College of Materials Science and Engineering, Hunan University,Jinchuan Nickel and Cobalt Research and Engineering Institute,Jinchuan Group Nickel Alloy Co.Ltd.
基金: financially supported by the National Natural Science Foundation of China (Nos. 51271076 and 51474101)
分类号: TG146.15
页码: 675-682
总页数: 8
文件大小: 1553K
下载量: 7