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作 者:罗晓梅[1,2] 毕广利[1,2] 姜静[1,2] 李明[1,2] 李荣广[3] 李元东[1,2] 马颖[1,2] 郝远[1,2]
机构地区:[1]兰州理工大学省部共建有色金属先进加工与再利用国家重点实验室,兰州730050 [2]兰州理工大学有色金属合金及加工教育部重点实验室,兰州730050 [3]沈阳化工大学机械工程学院,沈阳110142
出 处:《Transactions of Nonferrous Metals Society of China》2016年第2期390-397,共8页中国有色金属学报(英文版)
基 金:Projects(51301082,51464031,51201158)supported by the National Natural Science Foundation of China
摘 要:Compressive anisotropy of extruded Mg-2Dy-0.5Zn (mole fraction, %) alloy sheet was investigated. The alloy sheet was mainly composed ofα-Mg, (Mg, Zn)xDy phase and a large number of long period stacking ordered (LPSO) phases distributed along the extrusion direction. The compressive experimental results show that the alloy sheet exhibits an obvious compressive anisotropy. The compressive strength of the specimen in the extrusion direction (ED) is higher than those of the specimens in the transverse direction (TD) and 45° inclined to the extrusion direction. The compressive yield strength (CYS), ultimate compressive strength (UCS) and compressive strain of the specimen in the ED are 274.65 MPa, 518.94 MPa and 12.93%, respectively. The compressive anisotropy is mainly attributed to the distribution of LPSO phase and formation of〈10 10〉//ED fiber texture in the deformed grains.研究挤压态Mg-2Dy-0.5Zn(摩尔分数,%)合金板材的压缩各向异性。合金主要由α-Mg、(Mg,Zn)xDy相和大量沿挤压方向分布的长周期有序堆垛(LPSO)结构相组成。压缩实验测试结果表明,合金呈明显的压缩各向异性。平行于挤压方向(ED)合金试样的压缩强度显著高于板材横向(TD)及与挤压方向成45°角的合金试样的压缩强度。ED方向合金试样的压缩屈服强度(CYS)、最大压缩强度(UCS)和压缩应变分别为274.65 MPa,518.94 MPa和12.93%。合金压缩各向异性主要与LPSO相的分布以及变形晶粒中<1 010>//ED类型织构的形成有关。
关 键 词:Mg-Dy-Zn alloy microstructure TEXTURE LPSO phase compressive anisotropy
分 类 号:TG146.22[一般工业技术—材料科学与工程]
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