QUANTITATIVE ANALYSIS OF MICROSTRUCTURE EVOLUTION IN SHAPE MEMORY ALLOYS DURING MARTENSITIC TRANSFORMATION

摘要：

Through an image analysis technique of fine layered microstructures ofCu-based single crystalline shape memory alloys under uniaxial tension tests,thephase character function is then obtained to describe quantitatively themicrostructures evolution during stress-induced martensitic transformation (MT).Certain mesoscopical averages were constructed in order to obtain usableinformation of the microstructures.It was found that MT would occur with a stressdrop and certain amounts of phase fraction and number of interfaces.Moreover,theMT process is of multi-stage.The conclusion of one dimensional model agrees wellwith experimental result and helped interpreting the phenomena of initiation of MTand stress drop.

关键词： Image analysis Shape memory alloys (SMA) Martensitic transformation (MT) Stress drop Microstructure

作者: C.Peng Y.Yan Y.Z.Huo

作者单位: Department of Mechanics & Engineering Sciences,Fudan University,Shanghai,200433,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: 788-792

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）