Precipitate Behavior and Microstructure Evolution of γ′phase in Ni-Al Alloys with the Internal Elastic Strain

摘要：

　　The microstructure evolution and precipitation behaviors of ordered γ′(Ni3Al) phase in Ni-Al alloys were studied using the phase field dynamic model.Under the interactions of internal elastic strain,the γ′ phase morphology changes from the separated cuboidal to connected rectangle shape with the decrease of the aging temperature or the increase of the Al concentration.It also shows that the ordering of precipitates is finished instantly when they precipitate from the matrix phase.The γ′phase volume fraction and the phase transformation velocity are affected by the aging temperature and composition of the Ni-Al alloys.

关键词： Ni-Al alloy Precipitation Microstructure evolution Elastic strain Phase-field

作者: Xiaoling Cheng Yongsheng Li Lei Zhang Hao Zhu

作者单位: Engineering Research Center of Materials Behavior and Design, Ministry of Education, Nanjing University of Science and Technology, Nanjing 210094, China

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: 491-497

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）