کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7976942 | 1514698 | 2015 | 40 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
High temperature mechanical behavior of an extruded Mg-11Gd-4.5Y-1Nd-1.5Zn-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
The microstructure-property relation of an extruded Mg-11Gd-4.5Y-1Nd-1.5Zn-0.5Zr (wt%) alloy was investigated by conducting hot compression and high temperature creep at temperatures upto 250 °C. The alloy exhibits an average compressive yield strength (ÏCYS) of 363±1 MPa and an average elongation to failure (εCF) of 10.5±0.2% at room temperature, 301±13 MPa and 12.8±1.1% at 200 °C. In creep the minimum creep strain rate (εÌmin) is 1.94Ã10â9 sâ1 at 175 °C/160 MPa and 6.67Ã10â9 sâ1 at 200 °C/100 MPa. The obtained stress exponent n is in the range of 3.7-4.7, suggesting that the creep is controlled by the dislocation climb mechanism. The improvement in compressive strength and creep resistance is attributed to the fine recrystallized grains, SFs in the grain interior, Mg5RE and LPSO phases at grain boundaries. The alloy exhibits a bimodal texture with ã0001ã and ã101¯0ã components. Its strengthening effect is determined by the competition between these two texture components. In compressive deformation, the textural evolution from ã101¯0ã to ã0001ã is mainly attributed to the operation of basal ãaã slip and {101¯2}ã101¯1ã tensile twinning. This texture evolution is not seen in creep.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 645, 1 October 2015, Pages 213-224
Journal: Materials Science and Engineering: A - Volume 645, 1 October 2015, Pages 213-224
نویسندگان
Zijian Yu, Yuanding Huang, Hajo Dieringa, Chamini Lakshi Mendis, Renguo Guan, Norbert Hort, Jian Meng,