کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1613995 | 1516323 | 2013 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Evolution of microstructures at a wide range of solidification cooling rate in a Ni-based superalloy
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The evolution of microstructures at a wide range of solidification cooling rate in a Ni-based superalloy was investigated by employing conventional casting, spray casting and melt spinning processes. Depending on solidification cooling rate, microstructures sequentially show planar, cellular, dendritic, the dendritic growth suppressed features (in melt spinning process) and the shapes of γⲠprecipitates progressively exhibit irregular (planar and cellular growth), cuboidal (dendritic growth) and spherical (dendritic growth suppressed) patterns. Moreover, in dendritic growth conditions, γⲠshapes experience irregular cuboidal, regular cuboidal and near cuboidal patterns with increasing cooling rate. γⲠprecipitates in dendritic cores show more and less regular morphology than those in interdendritic regions in lower and higher cooling rate range, respectively. The size scale of γⲠprecipitates decreases with solidification cooling rate in cellular and dendritic growth conditions and γⲠprecipitates are obviously smaller in crystallizing (cellular or dendritic) cores than those in interval regions.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 570, 5 September 2013, Pages 70-75
Journal: Journal of Alloys and Compounds - Volume 570, 5 September 2013, Pages 70-75
نویسندگان
Yongjun Zhang, Yujin Huang, Lin Yang, Jianguo Li,