Influence of trace Ca addition on texture and stretch formability of AM50 magnesium alloy sheet  

微量Ca添加对AM50镁合金板材织构及成形性能的影响（英文）

作　　者：Hong-liang ZHAO Yun-xiao HUA Xiang-lei DONG Hui XING Yan-li LU 赵红亮;华云筱;董祥雷;邢辉;卢艳丽(郑州大学材料科学与工程学院,郑州450001;西北工业大学超常条件材料物理与化学教育部重点实验室,西安710129;西北工业大学凝固技术国家重点实验室,西安710072)

机构地区：[1]College of Materials Science and Engineering,Zhengzhou University,Zhengzhou 450001,China [2]The MOE Key Laboratory of Material Physics and Chemistry under Extraordinary Conditions,Northwestern Polytechnical University,Xi’an 710129,China [3]State Key Laboratory of Solidification Processing,Northwestern Polytechnical University,Xi’an 710072,China

出　　处：《Transactions of Nonferrous Metals Society of China》2020年第3期647-656,共10页中国有色金属学报（英文版）

基　　金：Projects(51801186,51974281)supported by the National Natural Science Foundation of China;Project(SKLSP201814)supported by the Fund of the State Key Laboratory of Solidification Processing in Northwestern Polytechnical University,China

摘　　要：The AM50,AM50-0.1 Ca,AM50-0.3 Ca and AM50-0.5 Ca(wt.%) alloys were hot-rolled and their mechanical properties were determined for the purpose of investigating the effect of trace Ca addition on the texture and stretch formability of AM50 alloy.The results show that the addition of trace Ca can effectively modify the basal texture,which is characterized by the split of basal poles deviated from the normal direction(ND) after the hot rolling,while a broad spread of the basal planes toward the transverse direction(TD) after the annealing.Such change of the basal texture is related to the prior formation of massive compression twins and the decrease of the c/a ratio.Erichsen value increases from 2.25 to 4.21 mm with the increase of Ca content.The enhancement of stretch formability is ascribed to the weakened basal texture,which results in the increase of n-value and the decrease of r-value.为研究微量Ca添加对AM50镁合金织构及成形性能的影响,对AM50、AM50-0.1Ca、AM50-0.3Ca和AM50-0.5Ca(质量分数,%)4种合金进行热轧,并对其力学性能进行测试。结果表明,微量Ca添加有效改善基面织构:热轧后合金基极偏离法向(ND),退火后基面向横向(TD)延伸。织构的改变与大量压缩孪晶的优先形成以及c/a值的减小有关。随Ca含量增加,合金杯突值由2.25升高至4.21 mm,其成形性能的提高归因于基面织构的弱化导致n值增加和r值减小。

关 键 词：magnesium alloy Ca addition TEXTURE stretch formability mechanical properties 

分 类 号：TG146.22[一般工业技术—材料科学与工程]