Abnormal temperature effect on tensile strength of Mg-13Gd-2Y-0.5Zr alloy

被引：20
作者：
Chen, Xiaoya [1 ,2 ]
Li, Quanan [1 ,2 ,3 ]
Zhu, Limin [2 ,3 ]
Chen, Jun [2 ,3 ]
机构：
[1] Xian Univ Technol, Sch Mat Sci & Engn, Xian 710048, Peoples R China
[2] Henan Univ Sci & Technol, Sch Mat Sci & Engn, Luoyang 471023, Peoples R China
[3] Prov & Minist Coconstruct Collaborat Innovat Ctr, Luoyang 471023, Peoples R China
来源：
VACUUM | 2020年 / 177卷
基金：
中国国家自然科学基金;
关键词：
Mg-13Gd-2Y-0.5Zr alloy; Anomalous temperature effect; Petal-like beta ' phase; Coherent strengthening; MECHANICAL-PROPERTIES; GD; MICROSTRUCTURE; SM; BEHAVIOR;
D O I：
10.1016/j.vacuum.2020.109398
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In this work, the microstructures and tensile properties of Mg-13Gd-2Y-0.5Zr (wt.%) alloy at different temperatures were studied. The results show that the tensile strength of Mg-13Gd-2Y-0.5Zr alloy increases first and then decreases with the increase of tensile temperature (showing abnormal temperature effect of tensile strength). The ultimate tensile strength is 315 MPa at 250 degrees C, which is 22.01% higher than that of 258 MPa at room temperature. The petal-like beta' phase diffusely distributes in the alpha-Mg matrix, and has a good coherent interface with the alpha-Mg matrix. The dislocation strengthening caused by Gd and Y elements and coherent strengthening of petal-like beta' are the main reasons for abnormal temperature effect of tensile strength.
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页数：4
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