Deformation in nanocrystalline metals
Deformation in nanocrystalline metals
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DOI：
10.1016/s1369-7021(06)71494-8
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发表时间：
2006-05
期刊：
影响因子：
24.2
通讯作者：
H. Swygenhoven;J. Weertman
中科院分区：
文献类型：
--
作者：
H. Swygenhoven;J. Weertman
现在可以合成由平均尺寸小于100 nm的晶粒组成的多晶金属。这样的纳米晶体金属包含由几乎完美的晶体分离的界面区域的显著体积分数。所涉及的小尺寸限制了位错源的常规操作，因此产生了一个基本问题：这些材料如何塑性变形？我们回顾了目前的观点，在纳米晶，面心立方金属的基础上获得的原子计算机模拟的见解变形机制。这些见解进行了讨论，参考最近引人注目的实验观察，可以与模拟预测。
It is now possible to synthesize polycrystalline metals made up of grains that average less than 100 nm in size. Such nanocrystalline metals contain a significant volume fraction of interfacial regions separated by nearly perfect crystals. The small sizes involved limit the conventional operation of dislocation sources and thus a fundamental question arises: how do these materials deform plastically? We review the current views on deformation mechanisms in nanocrystalline, face-centered cubic metals based on insights gained by atomistic computer simulations. These insights are discussed with reference to recent striking experimental observations that can be compared with predictions made by the simulations.