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dc.contributor.authorWu, Houpu-
dc.contributor.authorYang, Lianwei-
dc.contributor.authorLin, Xiaoping-
dc.contributor.authorLiu, Jie-
dc.contributor.authorChai, Tao-
dc.contributor.authorDong, Yun-
dc.identifier.issn0975-1017 (Online); 0971-4588 (Print)-
dc.description.abstractSamples 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.en_US
dc.publisherNISCAIR-CSIR, Indiaen_US
dc.rights CC Attribution-Noncommercial-No Derivative Works 2.5 Indiaen_US
dc.sourceIJEMS Vol.27(3) [June 2020]en_US
dc.subjectDirectional solidificationen_US
dc.subjectMg-Zn-Y alloysen_US
dc.subjectColumnar crystalsen_US
dc.subjectMechanical propertiesen_US
dc.titleMicrostructure and mechanical properties of directionally solidified alloys of Mg-9Zn-2Yen_US
Appears in Collections:IJEMS Vol.27(3) [June 2020]

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