Importance of propagation in controlling the twinning stress in Mg
Importance of propagation in controlling the twinning stress in Mg
复制标题
DOI：
10.1016/j.scriptamat.2018.11.047
复制
发表时间：
2019-03-15
影响因子：
6
通讯作者：
Barnett, M. R.
中科院分区：
文献类型：
--
作者：
Barnett, M. R.
为了强化六角金属，必须阻止孪晶和滑移。一个挑战是理解孪晶成核、扩展和增厚所需的临界应力如何与观察到的孪晶开始影响响应的应力相关。有人认为，在镁，传播的临界应力是重要的。一个临界条件的孪晶传播，以及与观察一致。结果表明，增加摩擦应力的孪晶传播直接转化为孪晶应力的增加。(C)2018 Acta Materialia Inc.由爱思唯尔有限公司出版。保留所有权利。
To strengthen hexagonal metals one must impede twinning as well as slip. One challenge is understanding how the critical stresses required for twin nucleation, propagation and thickening relate to the observed stress at which twinning begins to impact on the response. It is argued that in magnesium, the critical stress for propagation is important. A critical condition for twin propagation is derived that agrees well with observation. It is shown that increasing the friction stress for twin propagation translates directly to an increase in the twinning stress. (C) 2018 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.