An in-situ study of static recrystallization in Mg using high temperature EBSD

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外文摘要：It has been a common method to improve the mechanical properties of metals by manipulating their microstructures via static recrystallization,i.e.,through heat treatment.Therefore,the knowledge of recrystallization and grain growth is critical to the success of the technique.In the pres-ent work,by using in-situ high temperature EBSD,the mechanisms that control recrystallization and grain growth of an extruded pure Mg were studied.The experimental results revealed that the grains of priority for dynamic recrystallization exhibit fading competitiveness under static re-crystallization.It is also found that grain boundary movement or grain growth is likely to show an inverse energy gradient effect,i.e.,low ener-gy grains tend to swallow or grow into high energy grains,and grain boundaries of close to 30° exhibit superior growth advantage to others.Another finding is that {10-12} tensile twin boundaries are sites of hardly observed for recrystallization,and are finally swallowed by adjacent recrystallized grains.The above findings may give comprehensive insights of static recrystallization and grain growth of Mg,and may guide the design of advanced materials processing in microstructural engineering.

外文关键词：

Pure MgIn-situHT-EBSDRecrystallizationGrain growth

作者：

Xu Ye、Zhe Suo、Zhonghao Heng、Biao Chen、Qiuming Wei、Junko Umeda、Katsuyoshi Kondoh、Jianghua Shen

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作者单位：

School of Aeronautics,Northwestern Polytechnical University,Xi'an,Shaanxi,China

School of Mechanical Engineering,Qinghai University,Xining,Qinghai,China

School of Materials Science and Engineering,Northwestern Polytechnical University,Xi'an,Shaanxi,China

Department of Mechanical Engineering,University of North Carolina at Charlotte,Charlotte,NC,USA

Joining and Welding Research Institute,Osaka University,11-1 Mihogaoka,Osaka,Japan

Shaanxi Key Laboratory of Impact Dynamic and Its Engineering Application,Xi'an,Shaanxi,China

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基金：

111 Project

项目编号：

BP0719007

出版年：

2024

DOI：

10.1016/j.jma.2023.01.021

镁合金学报(英文)

ISSN：2213-9567

年,卷(期)：2024.12(4)