کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7969331 | 1514348 | 2018 | 28 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Morphology evolution of γⲠprecipitates in a powder metallurgy Ni-base superalloy
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله

چکیده انگلیسی
Effect of the cooling rate on the morphological evolution of the γⲠprecipitate in a powder metallurgy Ni-base superalloy FGH96 was studied. Results showed that as the cooling rate decreased from 600â¯Â°C/min to 2â¯Â°C/min, the precipitate morphology transformed from sphere to cuboid, octet and dendrite. As the cooling rate increased, the mean size of the γⲠprecipitates decreased while the nucleation density increased. When the cooling rate was lower than 6â¯Â°C/min, the precipitate would evolve from a sphere to cuboids with concave faces, octets, dendrite to final split-off branches. The morphological transition was driven by energy balance between coherent strain induced by the γâ²/γ lattice misfit and interface energy. The dendritic shape γⲠexhibited an eight-primary-branch pattern with preferred growth direction along ã111ã, and secondary arms along ã100ã.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Characterization - Volume 139, May 2018, Pages 382-389
Journal: Materials Characterization - Volume 139, May 2018, Pages 382-389
نویسندگان
Xianqiang Fan, Zhipeng Guo, Xiaofeng Wang, Jie Yang, Jinwen Zou,