Mg⁃Al合金中Mg_(17)Al_(12)相与镁基体取向关系的透射电子显微学研究  

TEM study of the orientation relationship between Mg_(17)Al_(12) phase and magnesium matrix in Mg⁃Al alloys

作　　者：刘飞亚 辛仁龙[2] 崔洪芝 刘庆[3] LIU Fei-ya;XIN Ren-long;CUI Hong-zhi;LIU Qing(College of Materials Science and Engineering,Ocean University of China,Qingdao Shandong 266100;College of Materials Science and Engineering,Chongqing University,Chongqing 400044;Key Laboratory for Light-Weight Materials,Nanjing Tech University,Nanjing Jiangsu 211816,China)

机构地区：[1]中国海洋大学材料科学与工程学院,山东青岛266100 [2]重庆大学材料科学与工程学院,重庆400044 [3]南京工业大学先进轻质高性能材料研究中心,江苏南京211816

出　　处：《电子显微学报》2022年第4期428-434,共7页Journal of Chinese Electron Microscopy Society

基　　金：国家自然科学基金资助项目(Nos.51871036,U2106216);山东省重大科技创新工程项目(No.2019JZZY010360).

摘　　要：本文利用透射电子显微镜研究了Mg⁃Al合金中β-Mg_(17)Al_(12)相与α-Mg基体之间的取向关系,发现了两种新的取向关系:OR⁃A:[2110]α//[511]β,(0111)α//(011)β;OR⁃B:[2110]α//[111]β,(0001)α//(211)β,(0110)α//(011)β。两种新取向关系的析出相均为棒状,分别倾斜或垂直于(0001)α基面。此外,本文归纳总结了Mg⁃Al合金中Mg_(17)Al_(12)相与镁基体之间已报道的所有可能的取向关系,基于两相之间密排面的平行关系,可将Mg_(17)Al_(12)相与镁基体的取向关系分为四类,每一类取向关系的析出相都具有特定的形貌与惯习面特征。Transmission electron microscopy(TEM)was used to investigate the orientation relationship(OR)betweenβ⁃Mg_(17)Al_(12) phase andα⁃Mg matrix in Mg⁃Al alloys.Two new ORs were observed:OR⁃A:[2110]α//[511]β,(0111)α//(011)β;OR⁃B:[2110]α//[111]β,(0001)α//(211)β,(0110)α//(011)β.The precipitates with both ORs have a rod⁃like shape with their long axis inclined to or perpendicular to the(0001)αbasal plane,respectively.In addition,all possible ORs between Mg_(17)Al_(12) phase and Mg matrix in Mg⁃Al alloys were also summarized in this work.Based on the parallel relationship of close⁃packed planes between the two phases,the ORs between Mg_(17)Al_(12) phase and Mg matrix can be divided into four types.The corresponding precipitates for each OR type have a unique morphology and habit plane.

关 键 词：镁合金 析出相 取向关系 透射电子显微镜 

分 类 号：TG146.22[一般工业技术—材料科学与工程] TG115.215.3[金属学及工艺—金属材料] TG115.23[金属学及工艺—金属学]