کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1573905 | 1514695 | 2015 | 19 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effect of natural ageing on microstructure and mechanical properties of Mg-10Gd-2Y-0.8Zr 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 effect of natural aging on the microstructure and mechanical properties of Mg-10 wt%Gd-2 wt%Y-0.5 wt%Zn-0.5 wt%Zr alloy (GW102) was investigated via optical microscopy (OM), field emission gun scanning electron microscopy (FEGSEM), high-resolution transmission electron microscopy (HRTEM), and differential scanning calorimetry (DSC). The results indicated that the natural placement had a significant effect on the microstructure, mechanical properties, and subsequent artificial aging behaviors of the extruded GW102 alloy. The α(Mg) isometric crystal of the as-extruded alloy was composed entirely of deformation structures, formed by several types of cross-slip. However, the deformation structure within α(Mg) was significantly reduced by performing a 3-year natural aging treatment after extrusion. Many strain-free zones were observed near the grain boundary. Moreover, the βⳠphase precipitated within the α(Mg) crystalline grains. The alloy was subjected to a 3-year natural aging treatment, followed by artificial aging at 200 °C; the resulting hardness and tensile strength were relatively high during the early stage, but decreased significantly at peak aging and the time required to reach peak aging was shortened. In addition, an aging peak platform (44-132 h) was observed. Moreover, the formation of βⳠand the reduction of the deformation zone at natural aging process promoted the subsequent artificial aging process.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 648, 11 November 2015, Pages 140-145
Journal: Materials Science and Engineering: A - Volume 648, 11 November 2015, Pages 140-145
نویسندگان
Z. Yang, H.B. Duan, Z.H. Wang, Y.C. Guo, P.H. Gao, J.P. Li,