کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8004125 1516574 2017 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Rietveld refinement, microstructure, mechanical properties and oxidation characteristics of Fe-28Mn-x Al-1C (x = 10 and 12 wt. %) low-density steels
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
Rietveld refinement, microstructure, mechanical properties and oxidation characteristics of Fe-28Mn-x Al-1C (x = 10 and 12 wt. %) low-density steels
چکیده انگلیسی
The quantitative relationship between microstructure and properties of austenitic Fe-28Mn-xAl-1C (x=10 and 12 wt. %) low-density steels was evaluated using Rietveld method to refine X-ray diffraction (XRD) patterns. The results showed that a typical three-phase austenitic steel was obtained in the forged Mn28Al10 (i. e. Fe-28Mn-10Al-1C) steel, which included about 92.85 wt. % γ-Fe(Mn, Al, C) (austenite), 5.28 wt. % (Fe, Mn)3 AlC0.3 (κ-carbide), and 1.87 wt. % α-Fe(Al, Mn) (ferrite). For the forged Mn28Al12 (i. e. Fe-28Mn-12Al-1C) steel, nevertheless, only about 76.64 wt. % austenite, 9.63 wt. % κ-carbide, 9.14 wt. % ferrite and 4.59 wt. % Fe3 Al (DO3) could be obtained. Nanometer κ-carbide and DO3 were mainly distributed in austenite grains and at the interface between austenite and ferrite, respectively. The forged Mn28Al10 steel had a better combination of strength, ductility and specific strength as compared with the forged Mn28Al12 steel. The ductility of the forged Mn28Al12 steel was far lower than that of the forged Mn28Al10 steel. The oxidation kinetics of Mn28Al10 steel oxidized at 1323 K for 5-25 h had two-stage linear rate laws, and the oxidation rate of the second stage was faster than that of the first stage. Although the oxidation kinetics of Mn28Al12 steel under this condition also had two-stage linear rate laws, the oxidation rate of the second stage was slower than that of the first stage. When the oxidation temperature increased to 1373 K, the oxidation kinetics of the two steels at 5-25 h had only one-stage linear rate law, and the oxidation rates of the two steels were far faster than those at 1323 K for 5-25 h. The oxidation resistance of Mn28Al12 steel was much better than that of Mn28Al10 steel. Ferrite layer formed between the austenite matrix and the oxidation layer of the two Fe-Mn-Al-C steels oxidized at high temperature.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Iron and Steel Research, International - Volume 24, Issue 12, December 2017, Pages 1190-1198
نویسندگان
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