Stress-induced softening and hardening in a bulk metallic glass
Stress-induced softening and hardening in a bulk metallic glass
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大块金属玻璃中应力引起的软化和硬化
DOI：
10.1016/j.scriptamat.2008.08.021
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发表时间：
2008-12-01
影响因子：
6
通讯作者：
Jiang, J. Z.
中科院分区：
文献类型：
--
作者：
Chen, L. Y.;Ge, Q.;Jiang, J. Z.
为了揭示预存应力/残余应力对金属玻璃力学行为的影响，研究了受应力金属玻璃的微观维克斯压痕。预存应力是通过弯曲引入的。结果表明，名义硬度随预存在的拉应力而减小，随预存在的压应力而增大。真实的硬度随预拉应力的增加而降低，随预压应力的增加而增加不明显。利用有限元分析研究了硬度对应力的强依赖性的机理。意外的硬度依赖于pi-c-现有的压缩应力进行了讨论。(c)2008 Acta Materialia Inc.由爱思唯尔有限公司出版。保留所有权利。
To uncover the influence of pre-existing/residual stress on the mechanical behavior of metallic glass, the micro-Vickers indentation of a stressed metallic glass was studied. The pre-existing stress was introduced by bending. The results show that the nominal hardness decreases with pre-existing tensile stress and increases with pre-existing compressive stress. The real hardness decreases with pre-existing tensile stress, but does not increase obviously with pre-existing compressive stress. The mechanism of the strong hardness dependence on stress was investigated using finite element analysis. The unexpected hardness dependence on pi-c-existing compressive stress is also discussed. (c) 2008 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.