کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7978967 | 1514717 | 2015 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The research of microstructure and mechanical properties of Mg-7Gd-3Y-1Nd-0.5Zn-0.5Zr (wt%) alloy
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله

چکیده انگلیسی
Microstructures and mechanical properties of Mg-7Gd-3Y-1Nd-0.5Zn-0.5Zr (wt%) alloy before and after homogenization at 520 °C were systematically studied. The results indicated that the microstructure of as-cast alloy mainly consisted of α-Mg, (Mg,Zn) 3 RE phase, Mg5 (RE, Zn) phase and some fine needle structures near the grain boundary; the (Mg, Zn) 3RE and Mg5 (RE, Zn) phases had a face centered cubic (fcc) structure and were isomorphous with β1 and β phases; the fine needle structures were an stacking fault. Heat treatment at 520 °C caused the dissolution of not only the (Mg, Zn) 3RE phase and Mg5 (RE, Zn) eutectic phases, but also the stacking fault into the α-Mg matrix; no long period stacking ordered (LPSO) phases were observed. The tensile test at room temperature suggested that the ultimate tensile strength (UTS), yield strength (YS) and elongation of the as-cast and as-homogenized were 170 MPa, 129 MPa and 238 MPa, 125 MPa, and the elongations were 3% and 12%, respectively. Fracture analysis of the as-cast alloys revealed that micro-cracks initiated in the grain boundary, which belonged to intergranular fracture, while the micro-cracks mainly appeared in the grain interior; the fracture mode was transgranular fracture after homogenization.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 626, 25 February 2015, Pages 415-422
Journal: Materials Science and Engineering: A - Volume 626, 25 February 2015, Pages 415-422
نویسندگان
Meng Li, Kui Zhang, Xinggang Li, Yongjun Li, Minglong Ma, Guoliang Shi, Jiawei Yuan, Ting Li, Jingbao Liu,