کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7969228 | 1514348 | 2018 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effect of cooling rate and Co content on the formation of Fe-rich intermetallics in hypoeutectic Al7Si0.3Mg alloy with 0.5%Fe
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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 effects of cooling rate and Co addition (0-1â¯wt%) on the Fe-rich intermetallics in Al7Si0.3Mg alloy with 0.5%Fe were studied in this study. The evolution of microstructure and crystal structure have been characterized by metallographic and transmission electron microscopy. The results indicated that higher cooling rate and Co addition were beneficial to modify the morphology and decrease the size of Fe-rich intermetallics. At the particular cooling rate of 2â¯k/s, 0.75â¯wt% Co was proved to be sufficient to improving the morphology of intermetallics from harmful acicular β-Al5FeSi phase to Chinese script or skeleton α-Al15(Fe,Co)3Si2 phase. Above all, the Co/Fe ratio in intermetallics was found to be an importance parameter in determining the morphology and crystal structure of (Fe,Co)-rich intermetallics. With the ratio increased from 0 to 3, the morphology changed gradually: acicular shapeâshort rod-like shapeâChinese script/skeleton like shapeârod-like shape. And the crystal structure of (Fe,Co)-rich intermetallics evolved from MonoclinicâHexagonalâSimple cubicâBody-centered structure correspondingly. The optimal ratio of Co to Fe in intermetallics, which has Chinese script with hexagonal structure, was in the range of 1-2.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Characterization - Volume 139, May 2018, Pages 116-124
Journal: Materials Characterization - Volume 139, May 2018, Pages 116-124
نویسندگان
Xiaoyan Wu, Huarui Zhang, Fengxiang Zhang, Zhen Ma, Lina Jia, Bo Yang, Tongxiang Tao, Hu Zhang,