کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7968935 | 1514345 | 2018 | 12 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Influence of temperature on the lattice misfit and elastic moduli of a Ni based single crystal superalloy with high volume fraction of γⲠphase
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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 variation of the lattice parameter with temperature in a Ni based single-crystal superalloy with high volume fraction of γⲠphase IC32 was determined by high-temperature X-ray diffraction (HT-XRD) technique at temperatures between 25â¯Â°C and 1200â¯Â°C. The effects of the temperature, especially the ultra-high temperature (beyond 1100â¯Â°C), on lattice misfit, elastic moduli, γⲠvolume fraction and composition of γ, γⲠphases were investigated in this study. The results show that the absolute value of lattice misfit first increased and then decreased with increasing temperature and reached the maximum of 0.53% at 1100â¯Â°C. When the temperature was higher than 1100â¯Â°C, the γⲠprecipitate obviously dissolved, leading to a lower content of Mo and Re in the γ phase, and then resulted in a smaller absolute value of lattice misfit. The contribution of dissolution of γⲠphase to the reduction of the misfit increased with rising temperature and reached 29.5% at 1200â¯Â°C. Moreover, when the temperature was above 1100â¯Â°C, the elastic moduli of the γ phase and alloy decreased significantly, while this phenomenon was not observed in the γⲠphase.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Characterization - Volume 142, August 2018, Pages 27-38
Journal: Materials Characterization - Volume 142, August 2018, Pages 27-38
نویسندگان
Liang Luo, Cheng Ai, Yue Ma, Shusuo Li, Yanling Pei, Shengkai Gong,