کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10142195 | 1646091 | 2019 | 26 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Coarsening behavior of γⲠprecipitates in the γ'+γ area of a Ni3Al-based alloy
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
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چکیده انگلیسی
The morphological evolution and coarsening kinetics of γⲠprecipitates in the γ'+γ area of a Ni3Al-based alloy during isothermal aging at temperature range of 800â¯Â°C to 1000â¯Â°C have been investigated. For the aging temperature above 900â¯Â°C, the average size of γⲠprecipitates increases and the morphology of γⲠprecipitates gradually changes from cuboidal to strip-like and L-shaped with increasing aging time up to 50â¯h. The temporal evolution of the average size of γⲠprecipitates is evaluated by the experimentally measured data and it suggests that the cube rate law fits better for experimental data at the early stage coarsening, while the square rate law fits better for the later stage coarsening. Moreover, using these determined values of coarsening rate constants which determined by using a coarsening rate equation based on the LSEM model, the activation energy of the early stage and later stage coarsening have been calculated as 174.2â¯kJ/mol and 186.3â¯kJ/mol, respectively.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 771, 15 January 2019, Pages 526-533
Journal: Journal of Alloys and Compounds - Volume 771, 15 January 2019, Pages 526-533
نویسندگان
Yuting Wu, Yongchang Liu, Chong Li, Xingchuan Xia, Jing Wu, Huijun Li,