Microstructure and finite element analysis of hot continuous rolling of doped tungsten rod

论文摘要

The microstructures of doped tungsten deformed by multi-pass hot continuous rolling were investigated, and the stress and strain fields were simulated by finite element（FE） method. After the continuous rolling, the grains of the tungsten rod were refined, and the microhardness was improved; however, a ring region of abnormal grain growth was present at a distance of about 3/5 R（R is the radius of the rod） from the center of the cross section. FE modeling results showed that the equivalent residual strains were minimum around the region of abnormal grain growth; this was due to the release of strain energy by severe plastic deformation, leading a situation where the migration force of grain boundaries was higher than the pinning force of potassium bubbles. By decreasing the initial rolling temperature and rolling speeds, the inhomogeneity of the equivalent residual stain decreased, improving the microstructure uniformity of the doped tungsten.

论文目录

文章来源

类型: 期刊论文

作者: Zheng-jie Shao,Hai-po Liu,Xiao-chun He,Bing Zhou,Yang Li,Shang-zhou Zhang,Meng-jin Li,Shu-jun Li

来源: International Journal of Minerals Metallurgy and Materials 2019年03期

年度: 2019

分类: 工程科技Ⅱ辑,工程科技Ⅰ辑

专业: 金属学及金属工艺,机械工业

单位: School of Nuclear Equipment and Nuclear Engineering, Yantai University,Institute of Metal Research, Chinese Academy of Sciences

基金: financially supported by Shandong Provincial Key Research and Development Program,China (No. 2017GGX20140),Shandong Provincial Natural Science Foundation,China (Nos. ZR2014JL031 and ZR2018MEE016)

分类号: TG335.11;TG146.411

页码: 369-376

总页数: 8

文件大小: 1508K

下载量: 15

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