Grain Boundary Migration in Polycrystals

IF 10.6 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Annual Review of Materials Research Pub Date : 2023-02-28 DOI:10.1146/annurev-matsci-080921-091511

G. Rohrer, I. Chesser, A. Krause, S. K. Naghibzadeh, Zipeng Xu, K. Dayal, E. Holm

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引用次数: 3

Abstract

Grain boundaries in polycrystalline materials migrate to reduce the total excess energy. It has recently been found that the factors governing migration rates of boundaries in bicrystals are insufficient to explain boundary migration in polycrystals. We first review our current understanding of the atomistic mechanisms of grain boundary migration based on simulations and high-resolution transmission electron microscopy observations. We then review our current understanding at the continuum scale based on simulations and observations using high-energy diffraction microscopy. We conclude that detailed comparisons of experimental observations with atomistic simulations of migration in polycrystals (rather than bicrystals) are required to better understand the mechanisms of grain boundary migration, that the driving force for grain boundary migration in polycrystals must include factors other than curvature, and that current simulations of grain growth are insufficient for reproducing experimental observations, possibly because of an inadequate representation of the driving force. Expected final online publication date for the Annual Review of Materials Research, Volume 53 is July 2023. Please see http://www.annualreviews.org/page/journal/pubdates for revised estimates.

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多晶中的晶界迁移

多晶材料的晶界迁移可以减少总多余能量。最近发现，控制双晶边界迁移速率的因素不足以解释多晶的边界迁移。我们首先回顾了目前基于模拟和高分辨率透射电子显微镜观察的晶界迁移原子机制的理解。然后，我们回顾了目前在连续尺度上基于模拟和观察使用高能衍射显微镜的理解。我们得出的结论是，为了更好地理解晶界迁移的机制，需要将实验观察结果与多晶(而不是双晶)中晶界迁移的原子模拟进行详细的比较，多晶中晶界迁移的驱动力必须包括曲率以外的因素，并且目前的晶粒生长模拟不足以再现实验观察结果。可能是因为没有充分代表驱动力。预计《材料研究年度评论》第53卷的最终在线出版日期为2023年7月。修订后的估计数请参阅http://www.annualreviews.org/page/journal/pubdates。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Annual Review of Materials Research 工程技术-材料科学：综合

CiteScore

17.70

自引率

1.00%

发文量

期刊介绍： The Annual Review of Materials Research, published since 1971, is a journal that covers significant developments in the field of materials research. It includes original methodologies, materials phenomena, material systems, and special keynote topics. The current volume of the journal has been converted from gated to open access through Annual Reviews' Subscribe to Open program, with all articles published under a CC BY license. The journal defines its scope as encompassing significant developments in materials science, including methodologies for studying materials and materials phenomena. It is indexed and abstracted in various databases, such as Scopus, Science Citation Index Expanded, Civil Engineering Abstracts, INSPEC, and Academic Search, among others.