Influence of crack length and grain boundaries on the propagation rate of short cracks in austenitic stainless steel
Influence of crack length and grain boundaries on the propagation rate of short cracks in austenitic stainless steel
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DOI：
10.1016/j.scriptamat.2012.07.007
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发表时间：
2012-10
影响因子：
6
通讯作者：
M. Scharnweber;W. Tirschler;V. Mikulich;S Jacob;C. Oertel;W. Skrotzki
中科院分区：
文献类型：
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作者：
M. Scharnweber;W. Tirschler;V. Mikulich;S Jacob;C. Oertel;W. Skrotzki
采用不同的塑性应变幅对奥氏体不锈钢进行了循环变形实验。反复中断实验，以确定现有裂纹的扩展速率和长度以及裂纹尖端和相对晶界之间的相应距离。结果揭示了显微结构和机械短裂纹之间的过渡制度，以及裂纹扩展的晶界的屏障效应的性质。
Cyclic deformation experiments on austenitic stainless steel were performed using different plastic strain amplitudes. The experiments were repeatedly interrupted in order to determine the propagation rate and length of the existing cracks as well as the corresponding distance between crack tip and opposing grain boundary. The results reveal the transition between the regimes of microstructurally and mechanically short cracks as well as the nature of the barrier effect of grain boundaries for crack propagation.