Strategies to increase austenite FCC relative phase stability in High-Mn steels
نویسندگان
چکیده
Several strategies to increase the FCC austenite stability compared BCC and HCP martensites have been tested are discussed. The relative of different phases was analyzed by studying effects of: a) grain size, b) antiferromagnetic ordering austenite, c) thermal cycling through FCC-HCP transition, d) plastic deformation e) combined effects. As a first step, effect decreasing size in Fe–Mn alloys for Mn contents smaller than 18 wt.%, where compete stability. Formation phase is inhibited 15 wt.% 17 sizes 2 μm. This enabled, time at these compositions, measurement Néel temperature using specific heat magnetic measurements. A comparison obtained transition temperatures with accepted models modifying on also showing complete inhibition 200 nm. nucleation model martensite considered which includes an additional resistance transformation term depending austenitic size. Additional stabilization discussed like interaction between introduction defects martensitic transformation. analysis can be easily applied systems larger number components. Results Fe–Mn–Cr system presented.
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ژورنال
عنوان ژورنال: Journal of Alloys and Compounds
سال: 2021
ISSN: ['0925-8388', '1873-4669']
DOI: https://doi.org/10.1016/j.jallcom.2020.156971