Fatigue of Severely Deformed Metals
Fatigue of Severely Deformed Metals
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DOI：
10.1002/adem.200310078
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发表时间：
2003-05
影响因子：
3.6
通讯作者：
A. Vinogradov;Shizuka Hashimoto
中科院分区：
文献类型：
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作者：
A. Vinogradov;Shizuka Hashimoto
在这篇简短的文章中，我们想回顾一下通过剧烈塑性变形（SPD）制造的超细晶粒材料的疲劳性能的现有数据，并根据目前可用的实验数据讨论其塑性变形和退化的可能机制。SPD的最突出的效果通常与显著的晶粒细化到纳米尺度有关。另一个明显的效果，伴随着密集的塑性应变，是位错积累到1016 m-2的极限密度。由于晶粒尺寸和位错密度这两个因素决定了多晶材料的强化，我们将主要讨论它们在严重预变形金属的循环变形中的作用。
In this brief communication, we would like to review present data on fatigue performance of ultra‐fine grain materials fabricated by severe plastic deformation (SPD) and to discuss the possible mechanisms of their plastic deformation and degradation in light of currently available experimental data. The most prominent effect of SPD is often associated with significant grain refinement down to the nanoscopic scale. The other evident effect, which accompanies intensive plastic straining, is the dislocation accumulation up to limiting densities of 1016 m–2. Since namely these two factors, the grain size and the dislocation density, govern the strengthening of polycrystalline materials, we shall primarily confine ourselves to their role in cyclic deformation of severely pre‐deformed metals.