Microyielding and damping capacity in magnesium
Microyielding and damping capacity in magnesium
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DOI：
10.1016/j.scriptamat.2014.06.004
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发表时间：
2014-09
影响因子：
6
通讯作者：
H. Watanabe;T. Sawada;Y. Sasakura;N. Ikeo;T. Mukai
中科院分区：
文献类型：
--
作者：
H. Watanabe;T. Sawada;Y. Sasakura;N. Ikeo;T. Mukai
研究了挤压镁合金相对于挤压方向倾斜0°、15°和30°试样在单轴拉伸和压缩条件下的阻尼性能和力学响应。研究发现，单轴变形下的微屈服和应变相关阻尼能力的出现都属于同一物理事件：<a>弱钉扎点处的基底位错的脱离和随后强钉扎点之间位错的扫掠运动。
The damping capacity and mechanical response under uniaxial tension and compression were examined for specimens of extruded magnesium inclined by 0°, 15° and 30° relative to the extrusion direction. It was found that both the microyielding under uniaxial deformation and the occurrence of strain-dependent damping capacity pertain to the same physical event: the breaking away of basal <a> dislocations from weak pinning points and the subsequent sweeping motion of dislocations between strong pinning points.