Unveiling the underlying mechanism of forming edge cracks upon high strain-rate rolling of magnesium alloy
Unveiling the underlying mechanism of forming edge cracks upon high strain-rate rolling of magnesium alloy作者机构：Key Laboratory of High Temperature Wear Resistant Materials Preparation Technology of Hunan ProvinceHunan University of Science and TechnologyXiangtan 411201China Faculty of Mechanical Engineering and MechanicsNingbo UniversityNingbo 315211China Max-Planck-Institut für Eisenforschung GmbHMax-Planck-Strafie 1Dusseldorf40237Germany College of Mechanical and Electrical EngineeringCentral South University of Forestry and TechnologyChangsha 410004China Key Laboratory of High Temperature Wear Resistant Materials Preparation Technology of Hunan ProvinceHunan University of Science and TechnologyXiangtan 477207China
出 版 物：《Journal of Materials Science & Technology》 (材料科学技术（英文版）)
年 卷 期：2020年第47卷第15期
页 面：59-65页
核心收录：
学科分类：080503[工学-材料加工工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0802[工学-机械工程] 080201[工学-机械制造及其自动化]
基 金：financially supported by the National Natural Science Foundation of China (Nos. 51601062 51905166 11872216 and 51605159)
主 题：Edge crack Secondary crack High strain-rate rolling AZ31 magnesium alloy Dynamic recrystallization
摘 要：In the current study,high strain-rate rolling(≥10 s-1) has been successfully employed to produce Mg-3 A1-1 Zn alloy sheets to a high reduction of 82% with a fine grain structure in a single *** underlying mechanism of forming primary and secondary edge cracks has been *** is found that dynamic recrystallization(DRX) induced by subgrains tends to blunt cracks,while twinning-induced D RX is mainly observed around sharp crack *** motion of emitted dislocations from blunted cracks is inhibited by the DRX grain ***,on one hand,increases local work hardening,and on the other hand,causes stress concentration alo ng grain boundaries especially in the triple junctions leading to the formation of secondary cracks.
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