Strengthening and Toughening Effect on Tungsten Subjected to Multiple ECAP

摘要：

This paper presents the research results of the grain refining effect on the ductile-to-brittle transition temperature (DBTT) of commercial purity tungsten. The as-received tungsten was subjected to eight passes of equal-channel angular pressing (ECAP) at decreasing temperatures from 1300 to 1150 ℃. According to optical and TEM microscopy the average grain size was refined considerably from ~80 um to ~1 urn. The mechanical tensile tests, carried out at various temperatures for the tungsten samples, showed that DBTT decreased approximately 80 ℃ as a result of microstructure refinement by ECAP, at the same time the strength also increased 50-100 % by grain refinement. SEM observation of the fractures confirmed the mechanical testing results.

作者: Hao Yuan Yue Zhang Artur V.Ganeev Jing Tao Wang Igor V.Alexandrov

作者单位: Department of Materials Science and Engineering,Nanjing University of Science and Technology,Nanjing Ufa State Aviation Technical University,12K.Marx,Ufa 450000,Russia

会议类型: 国际会议

会议名称: 5th International Conference on Nanomaterials by Severe Plastic Deformation(第五届剧烈塑性变形纳米材料国际会议)

会议地点: 南京

会议语种:英文

页码: 701-706

在线出版日期: 2011-03-01（万方平台首次上网日期，不代表论文的发表时间）