期刊
ACTA MATERIALIA
卷 83, 期 -, 页码 256-268出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.actamat.2014.09.034
关键词
Isotropic hardening; Kinematic hardening; Precipitation; Age hardening; Cyclic loading
资金
- AREVA
- French Atomic Energy Commission (CEA)
- SAFRAN
Multi-level cyclic loading is performed on an aluminium 6061 alloy. From an initial fully precipitated T6 state, various non-isothermal heat treatments are performed, leading to various precipitation states. This paper focuses on the effect of precipitates on yield stress, and on kinematic and isotropic hardening. In parallel, the elastoplastic behaviour is modelled coupling a recently developed multi-class precipitation model to an adaptation of the classical Kocks-Mecking-Estrin formalism. In addition to the classical isotropic effect of solid solution, precipitates and dislocation forests, the proposed model takes into account the kinematic contribution of grain boundaries as well as precipitates, thus providing a new physical meaning to the Armstrong Frederick law. The resulting cyclic stress strain curves compare well with the experimental ones for all treatments and strain levels. (C) 2014 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