期刊
ACTA MATERIALIA
卷 59, 期 8, 页码 3287-3296出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.actamat.2011.02.002
关键词
Multi-phase field; Shape memory alloy; Ni4Ti3 precipitation; Applied stress; Diffusion
资金
- DFG [Sonderforschungsbereich 459, A8]
- ICAMS
- ThyssenKrupp Steel AG
- Salzgitter Mannesmann Forschung GmbH
- Robert Bosch GmbH
- Bayer Materials Science AG and Bayer Technology Services GmbH
- Benteler AG
- state of North Rhine-Westphalia
- European Community
The effect of a superimposed stress on the coarsening of interacting Ni4Ti3 particles is studied using the multi-phase field method. It is found that the thickness/diameter ratio of a Ni4Ti3 particle in a (1 1 1)B-2 plane increases with an increasing [1 1 1](B2) stress component. The particle shape can change from a disk to a sphere with increasing applied stress. It is also found that diffusional and mechanical interactions between two Ni4Ti3 particles can promote the nucleation of new particles. This provides an explanation for the autocatalytic nature of nucleation reported previously. Compressive stresses along [1 1 1](B2) increase the volume fraction and growth velocity of the Ni4Ti3 particles of the (1 1 1)(B2) plane. Misoriented particles disappear during particle growth. The simulation results are discussed in the light of previous experimental results. (C) 2011 Acta Materialia Inc. Published by 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