期刊
INTERNATIONAL JOURNAL OF NON-LINEAR MECHANICS
卷 40, 期 2-3, 页码 177-193出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijnonlinmec.2004.05.005
关键词
free-energy; lattice symmetry; shape memory alloys; Cu-Al-Ni
类别
In this paper we develop a free energy function for a Cu-AI-Ni alloy undergoing cubic-orthorhombic phase transitions. We use the irreducible Lagrangian strain polynomial invariants of the cubic austenite parent phase to construct a polynomial expansion for the Helmholtz free energy. Our expansion retains quartic terms of the strain components in order to describe the two-phase material-the cubic austenite phase and six variants of the orthorhombic martensite phase. The coefficients of the free energy polynomial function are temperature dependent and are fitted to appropriate experimental data for austenite and martensite phases from literature. The resulting Helmholtz free energy function is given by (3.20), (4. 11). We examine the response predicted by the model for shear in the twinning directions. (C) 2004 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据