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<strong>Microstructure and mechanical properties of directionally solidified alloys of Mg-9Zn-2Y</strong>

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Title Statement <strong>Microstructure and mechanical properties of directionally solidified alloys of Mg-9Zn-2Y</strong>
 
Added Entry - Uncontrolled Name Wu, Houpu ; School of Resources and Materials, Northeastern University at Qinhuangdao 066004, Qinhuangdao, China
Yang, Lianwei ; School of Resources and Materials, Northeastern University at Qinhuangdao 066004, Qinhuangdao, China
Lin, Xiaoping ; School of Resources and Materials, Northeastern University at Qinhuangdao 066004, Qinhuangdao, China
Liu, Jie ; School of Resources and Materials, Northeastern University at Qinhuangdao 066004, Qinhuangdao, China
Chai, Tao ; School of Resources and Materials, Northeastern University at Qinhuangdao 066004, Qinhuangdao, China
Dong, Yun ; School of Resources and Materials, Northeastern University at Qinhuangdao 066004, Qinhuangdao, China
 
Uncontrolled Index Term Directional solidification, Mg-Zn-Y alloys, Columnar crystals, Mechanical properties
 
Summary, etc. Samples of directionally solidified Mg-9Zn-2Y alloys have been obtained using vacuum induced directional solidification equipment. The metallographic structures and mechanical properties at room and high temperatures of the directionally solidified alloys have been investigated and compared with those of conventional casting alloys. The structures have consisted of columnar crystals with a specific orientation, and the parallel phases near the grain boundaries and inside the grains have quasi-crystals of I-Mg3Zn6Y. At room temperature, the maximum compressive resistance and section expansion ratio of the directionally solidified alloys have been 54 and 31% higher, respectively, than those of the conventional casting alloys. The peak stress of the directionally solidified alloys has found 238 MPa, which is 57% higher than that of the conventional casting alloys (152 MPa) at 200 C with a strain rate of 0.1 s-1. In addition, the peak stress was 140 MPa at 300 C with a strain rate of 0.1s-1, while it was only 84 MPa for the conventional casting alloys. Therefore, the directionally solidified alloys has higher strength and plasticity at room temperature and improved mechanical properties at a high temperature.
 
Publication, Distribution, Etc. Indian Journal of Engineering and Materials Sciences (IJEMS)
2021-01-11 15:40:19
 
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http://op.niscair.res.in/index.php/IJEMS/article/view/44965
 
Data Source Entry Indian Journal of Engineering and Materials Sciences (IJEMS); ##issue.vol## 27, ##issue.no## 3 (2020): Indian Journal of Engineering and Materials Sciences
 
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