Effect of long-period ordered stacking on twinning behavior and mechanical properties of Mg-Al-Y alloy during uniaxial hot compression

作     者：Shuai Yuan Jinhui Wang Lei Zhang Shiyu Luan Peipeng Jin Shuai Yuan;Jinhui Wang;Lei Zhang;Shiyu Luan;Peipeng Jin

作者机构：Qinghai Provincial Key Laboratory of New Light AlloysQinghai Provincial Engineering Research Center of High Performance Light Metal Alloys and FormingQinghai UniversityXining 810016China School of Material Science and EngineeringShenyang University of TechnologyShenyang 110870China 

出 版 物：《Journal of Materials Science & Technology》 (材料科学技术（英文版）)

年 卷 期：2023年第142卷第11期

页      面：152-166页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：the financial support of Qinghai Provincial Key Laboratory of New Light Alloys(No.2022-ZJ-Y20)to carry out this research work 

主　　题：LPSO strengthening Hot deformation Twinning behavior 

摘      要：Two alloys with(T4-4h)and without(T4-8h)long-period stacking ordered(LPSO)phase were obtained by solution treatment of as-cast Mg-1Al-12Y alloy at 540℃ for 4 h and 8 h,*** compressive tests(300-450℃,ε=0.01s^(-1))showed that the strengthening effect of LPSO in T4-4h alloy gradually disappeared with temperature *** addition,the corresponding compression deformation behavior of the two alloys was also investigated by electron backscatter diffraction(EBSD).It was found that the twinning of the two alloys was dominated by{1012}extension twins,and the large amount of lamellar LPSO in T4-4 h alloy inhibited the activation and growth of ***[0001]//compression direction(CD)texture formed after deformation is mostly attributed to the activation and growth of extension *** analyzing the activated twin variants,it was found that the activation of twin variants mainly depended on Schmid factor(SF).For twin variants with smaller SF,they may be activated due to local stress *** on the analysis results of in-grain misorientation axis(IGMA)and SF,the deformation mechanism of the alloys at elevated temperature is dominated by basal slip and non-basal *** stronger mechanical properties of T4-4h alloy than those of T4-8h are attributed to the obstruction of non-basal slip movement by LPSO.