Microstructure Evolution and Processing Map of Superalloy GH720Li during Isothermal Compression

摘要：

　　Isothermal compression tests for superalloy GH720Li were conducted to investigate the effect of hot deformation parameters on microstructure evolution.The changing characteristics of flow stress during hot deformation were also studied.The flow instability area was calculated based on Prasad Plastic Instability Criterion and the hot processing map was obtained.The results showed that dynamic recrystallization was the main softening mechanism of GH720Li alloy during hot deformation.The peak and steady stress decreased significantly with an increase of test temperature and a decrease of the strain rate.Finally,three unstable areas have been found from the processing map.

关键词： GH720Li:Microstructure evolution:Hot deformation behavior:Processing map

作者: Zhao Li Shuhong Fu Tao Wang Yuxin Zhao Yong Zhang Maicang Zhang

作者单位: Science and Technology on Advanced High Temperature Structure Materials Laboratory, Beijing Institut Science and Technology on Advanced High Temperature Structure Materials Laboratory, Beijing Institut Department of Materials Science and technology, University of Science and Technology Beijing,No.30 X

会议类型: 国际会议

会议名称: the Chinese Materials Congress 2012(2012年中国材料大会(CMC2012))

会议地点: 太原

会议语种:英文

页码: 588-593

在线出版日期: 2012-07-13（万方平台首次上网日期，不代表论文的发表时间）