Elevated temperature compressive strength and deformation behavior of a ZrCP reinforced tungsten-matrix composite

摘要：

The elevated temperature deformation behavior of a 30vol.％ZrCp/W composite was studied by hot compression. The true stress-true strain curves exhibit a steady flow characteristic. The flow stress strongly depends on temperature and strain rate. The facture strain increases with increasing temperature and decreasing strain rate. The activation energy and the stress exponent were calculated as 344kJ/mol and 17.6, respectively. The deformation mechanisms of the composite are the dynamic recovery in tungsten matrix at temperatures under 1500oC and the dynamic recrystallization in tungsten matrix at 1600oC, but accompanied by a little pseudo-plasticity behavior at 1300℃ in the strain rate of 10-1～1/s. The dislocation behavior in ZrC particle contributes to the plastic deformation of the composite.

关键词： 30vol. ZrCp/W composite Compressive deformation Dynamic recovery and recrystallization Pseudo-plasticity

作者: Yujin Wang Taiquan Zhang Yu Zhou Tingquan Lei Guiming Song

作者单位: Institute for Advanced ceramics, Harbin Institute of Technology, Harbin, 150001 P.R.China

会议类型: 国际会议

会议名称: The Fifth International Conference on Physical and Numerical Simulation of Materials Processing(第五届材料与热加工物理模拟及数值模拟国际会议)

会议地点: 郑州

会议语种:英文

在线出版日期: 2007-10-23（万方平台首次上网日期，不代表论文的发表时间）