کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10155955 | 1666369 | 2019 | 19 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Phase separated characteristics affected by cooling rate of immiscible Cu-Cr alloy by laser surface melting
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
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چکیده انگلیسی
The effect of cooling rates on the solidified microstructure of Cu-50Cr (wt. %) produced by laser surface melting (LSM) was studied. Layered structure transformed into a dispersed structure when the cooling rate increased from â¼105â¯K/s to â¼106â¯K/s. The average diameter of the Cr-rich spheroids in the homogenous layer was reduced to less than 1â¯Î¼m, and the migration velocity by Marangoni motion was â¼103 times higher than the velocity by Stokes sedimentation, suggesting that the movements of α-Cr droplets containing supersaturated Cu phase during liquid phase separation (LPS) were dominated by Marangoni motion. Although the collisions and coagulations between Cr droplets couldn't be eliminated, the growth was suppressed by high cooling rate. The melt layer presented improved homogenous microhardness and the well-dispersed melt layer exhibited higher withstanding voltage than that of the untreated.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 772, 25 January 2019, Pages 209-217
Journal: Journal of Alloys and Compounds - Volume 772, 25 January 2019, Pages 209-217
نویسندگان
Litian Zhang, Gang Yu, Xiuli He, Shaoxia Li, Weijian Ning, Xu Wang,