文章基本信息

标题：A quantitative study of stress fields ahead of a slip band blocked by a grain boundary in unalloyed magnesium
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作者：Mohsen Taheri Andani ; Aaditya Lakshmanan ; Mohammadreza Karamooz-Ravari 等
期刊名称：Scientific Reports
电子版ISSN：2045-2322
出版年度：2020
卷号：10
期号：1
页码：1-8
DOI：10.1038/s41598-020-59684-y
出版社：Springer Nature
摘要：Stress localization ahead of a slip band blocked by a grain boundary is measured for three different grain boundaries in unalloyed Mg using high-resolution electron backscatter diffraction (HR-EBSD). The results are compared with a theoretical dislocation pile-up model, from which slip system resistance and micro-Hall–Petch coefficients for different grain boundary types are deduced. The results indicate that grain boundary character plays a crucial role in determining micro-Hall–Petch coefficients, which can be used to strengthen classical crystal plasticity constitutive models to make predictions linked to the effect of grain boundary strengthening.