کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7980018 | 1514728 | 2014 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Laves-phase precipitates in a low-carbon 9% Cr martensitic steel during aging and creep at 923Â K
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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 precipitation of the Laves-phase in a low-carbon 9% Cr heat resistant steel was studied under conditions of aging and creep at 923Â K. The Laves-phase of Fe2(W,Mo)-type with a ratio of Mo:W of 1:5 was observed on various boundaries in a tempered martensite structure after a long period of aging/creep. The Laves-phase precipitations provided effective stabilization of the tempered martensite lath structure and therefore promoted creep resistance, although their effect on the dislocation substructure was negligibly small. The mean size of the Laves-phase particles (D) gradually increased with aging/creep time (Ï) and could be expressed as D4âD04=KÏ, were K=5Ã10â34Â m4/s for aging and K=13Ã10â34Â m4/s for creep. The large Laves-phase particles, which coarsened during the creep tests, served as preferential sites for pore and crack nucleation leading to fracture.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 615, 6 October 2014, Pages 153-163
Journal: Materials Science and Engineering: A - Volume 615, 6 October 2014, Pages 153-163
نویسندگان
I. Fedorova, A. Belyakov, P. Kozlov, V. Skorobogatykh, I. Shenkova, R. Kaibyshev,