کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1582970 | 1514877 | 2008 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Grain growth and particle pinning in a model Ni-based superalloy
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
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چکیده انگلیسی
An experimental study has been performed on the grain growth in a model Ni-based superalloy, with particular emphasis on the pinning effect of the second-phase particles. Extensive annealing experiments were performed, and the microstructural development was evaluated in detail using scanning and transmission electron microscopy. It was found that grain growth was strongly inhibited by the pinning effect of both the coarse γⲠphase and the inert precipitates. For samples heat-treated at temperatures below the γⲠsolvus (1143 °C), the limiting grain size was determined by the size and volume fraction of the γⲠphase. For samples heat-treated at super-solvus temperatures, the stability of the MC-type carbides and yttrium oxides led to a nearly constant Zener limiting grain size over the temperature range 1143-1244 °C. Samples heat-treated at 1270 °C had larger grain sizes due to the coarsening and/or dissolution of the MC-type carbides and yttrium oxides.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 479, Issues 1â2, 25 April 2008, Pages 365-372
Journal: Materials Science and Engineering: A - Volume 479, Issues 1â2, 25 April 2008, Pages 365-372
نویسندگان
Kai Song, Mark Aindow,