Recrystallization initiated by low-temperature grain boundary motion coupled to stress
Recrystallization initiated by low-temperature grain boundary motion coupled to stress
复制标题
由与应力耦合的低温晶界运动引发的再结晶
DOI：
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
Y. Mishin
中科院分区：
文献类型：
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作者：
J. Cahn;Y. Mishin
提出了一种新的冷变形金属再结晶机制。在冷变形过程中，一些大角度晶界被施加的应力移动，产生低曲率凸起，并留下几乎无缺陷的区域。这种运动的驱动力非常高，可以与材料的屈服应力相媲美。在随后的加热而不施加应力时，这种移动的边界可以在由跨越边界的存储能量差产生的小得多的驱动力下继续移动而不会遇到能量势垒（这是大多数成核模型的典型特征）。
Abstract We propose a new mechanism of recrystallization of cold-deformed metals. During the cold deformation, some of the high-angle grain boundaries are moved by the applied stresses, producing low-curvature bulges and leaving almost defect-free regions behind. The driving force for this motion is very high and can be comparable to the yield stress of the material. Upon subsequent heating without applied stresses, such moved boundaries can continue to move without encountering an energy barrier (which is typical of most nucleation models) under the much smaller driving force arising from the stored energy difference across the boundary.