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Grain Rotation in Plastic Deformation

机译：塑料变形中的颗粒旋转

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摘要

The plastic deformation behaviors of crystalline materials are usually determined by lattice dislocations. Below a certain particle or grain size, focus is placed on the grain-boundary-mediated mechanisms (e.g., grain rotation, grain boundary sliding, and diffusion), which has been observed during recrystallization, grain growth, and plastic deformation. However, the underlying mechanisms of grain rotation remain to be studied. In this article, we review the theoretical models, molecular dynamics simulations, and experimental investigations on grain rotation. The development of in situ transmission electron microscopy (TEM) and X-ray characterization methods for probing grain boundary processes during plastic deformation provides a better understanding of the mechanisms of grain rotation. Especially, the ability to acquire high-quality X-ray diffraction patterns from individual nanograins is expected to find broad applications in various fields such as physics, chemistry, materials science, and nanoscience.
机译：晶体材料的塑性变形行为通常通过晶格脱位确定。在一定的颗粒或晶粒尺寸以下，焦点被放置在晶粒边界介导的机制（例如，颗粒旋转，晶界滑动和扩散）上，在重结晶，晶粒生长和塑性变形期间已经观察到。然而，仍然研究谷物旋转的潜在机制。在本文中，我们审查了理论模型，分子动力学模拟和对晶粒旋转的实验研究。在塑性变形期间探测晶界工艺的原位透射电子显微镜（TEM）和X射线表征方法的发展提供了更好地理解颗粒旋转机制。特别是，预计从各个纳米中获取高质量的X射线衍射图案的能力将在各种领域中找到广泛的应用，例如物理，化学，材料科学和纳米科学。

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