EFFECT OF MICRO-VOIDS ON PHASE TRANSFORMATION IN A NITI-ALLOY

摘要：

Experimental studies have indicated that commercial superelastic NiTi alloysconsist of particles and inclusions which can nucleate micro-voids.In this study theeffect of micro-voids on phase transformation and behavior of a superelastic NiTi-alloy has been investigated.An analysis has been made of axisymmetric unit-cellmodels with different micro-void volume fraction subjected to various stresstriaxiality states.The finite element results indicate that the existence of micro-voids can significantly reduce the martensite transformation stress.This effectshould be taken into consideration of constitutive modeling.

关键词： NiTi Micro-voids Phase Transformation Triaxiality

作者: J.S.Olsen Z.L.Zhang C.van der Eijk

作者单位: Department of Structural Engineering,Norwegian University of Science and Technology (NTNU),N-7491 Tr SlNTEF Materials and Chemistry,N-7465 Trondheim,Norway

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: 732-735

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）