کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1583201 | 1514878 | 2008 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Temperature dependence of MC decomposition behavior in Ni-base superalloy GTD 111
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله

چکیده انگلیسی
Microstructural evolution including MC decomposition during thermal exposure in GTD 111 has been investigated. After standard heat treatment, polycrystalline GTD 111 specimens were thermally exposed up to 10,000 h in the temperature range of 871-982 °C. Quantitative and qualitative metallographic analyses have been carried out to identify distribution and composition of the existing phases. Growth rate of γⲠof the alloy was proportional to the 1/3 power of the exposed time. The activation energy calculated for γⲠcoarsening was 256 kJ/mol. MC carbides decomposed into η and M23C6 during thermal exposure at 871 and 927 °C rather than M23C6 and γâ². Precipitation of sigma (Ï) phase was observed in the vicinity of MC or M23C6 carbides, especially in the specimen exposed at 871 °C. Continuous γⲠand M23C6 film precipitated along the grain boundary and fine η within γ-γⲠeutectic pool dissolved during thermal exposure at 982 °C.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 478, Issues 1â2, 15 April 2008, Pages 329-335
Journal: Materials Science and Engineering: A - Volume 478, Issues 1â2, 15 April 2008, Pages 329-335
نویسندگان
Baig Gyu Choi, In Soo Kim, Doo Hyun Kim, Chang Yong Jo,