کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1621855 | 1516398 | 2009 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Nucleation, growth and coarsening of γâ²-precipitates in a Ni-Cr-Al-based commercial superalloy during artificial aging
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
A study of the decomposition kinetics of the IN-X750 Ni-based superalloy using positron annihilation lifetime spectroscopy (PALS), microhardness and transmission electron microscopy (TEM) is presented. PALS results confirmed that nucleation and growth of γâ²-precipitates are assisted by vacancies. Due to the high sensitivity of positrons for vacancy-like defects, information regarding vacancy-solute clusters formed during the very early stages of aging was obtained. The positron lifetime and TEM results were analyzed following classical precipitation models to interpret the kinetics of the γâ²-precipitate formation. Finally, from TEM measurements a value of the γâ²-precipitate coarsening rate for the alloy studied was obtained.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 479, Issues 1â2, 24 June 2009, Pages 129-133
Journal: Journal of Alloys and Compounds - Volume 479, Issues 1â2, 24 June 2009, Pages 129-133
نویسندگان
A. Picasso, A. Somoza, A. Tolley,