کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1559444 999360 2007 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Experimental and thermodynamic study of tantalum-containing iron-based alloys reinforced by carbides: Part I — Case of (Fe, Cr)-based ferritic steels
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
Experimental and thermodynamic study of tantalum-containing iron-based alloys reinforced by carbides: Part I — Case of (Fe, Cr)-based ferritic steels
چکیده انگلیسی

Experiments and thermodynamic calculations were performed on three iron-based alloys containing 30 wt% of chromium and 3 to 6 wt% of tantalum. Solidus temperatures, natures, and surface fractions of all phases present after an exposure for 50 h at 1000, 1100, and 1200  ∘C, were determined for each alloy. These results were compared to values calculated using Thermo-Calc. Two alloys display solidus temperatures above 1400  ∘C, while all the liquidus temperatures are higher than 1500  ∘C. Tantalum carbides are present with high fractions, compared to similar Co-based and Ni-based alloys. Their observation and quantification using electron microscopy micrographs and image analysis may lead one to overestimate the surface fractions of TaC. Calculations of carbide fractions from the chemical composition of the matrix is to be preferred. A precipitation of coarse chromium carbides may occur for 1100 and 1200  ∘C.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Calphad - Volume 31, Issue 3, September 2007, Pages 351–360
نویسندگان
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