MICROMECHANICS METHOD TO SIMULATE MORPHOLOGICAL EVOLUTION OF PRECIPITATES IN NI-BASED SUPERALLOYS

摘要：

An analytical method has been proposed to investigate the morphological evolution of precipitates in Ni-based superalloys.The elastic energy is calculated as the function of the precipitates shape based on Eshelbys inclusion theory and Mori-Tanakas mean field method.It is found that the elastic energy becomes minimum if precipitates adopt a certain shape when the external stress and matrixplastic strain are introduced.These results are in agreement with the rafted morphologies observed in crept superalloys.

关键词： Ni-based superalloys matrix plastic strain rafting mechanism

作者: W.P.Wu Y.F.Guo Y.S.Wang

作者单位: Institute of Engineering Mechanics,Beijing Jiaotong University,Beijing,100044,China

会议类型: 国际会议

会议名称: 第二届国际非均质材料力学会议(The Second International Conference on Heterogeneous Material Mechanics)

会议地点: 安徽黄山

会议语种:英文

页码: 26-29

在线出版日期: 2008-06-03（万方平台首次上网日期，不代表论文的发表时间）