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Grain‐boundaries and inter‐packet boundaries as potential sites for austenite retention in heat‐treated and rolled extra low‐carbon Mn‐Si and Mn‐Si‐Nb high strength low alloy “mar” steels
Author(s) -
Patwardhan Arun Kumar
Publication year - 1983
Publication title -
archiv für das eisenhüttenwesen
Language(s) - English
Resource type - Journals
eISSN - 1869-344X
pISSN - 0003-8962
DOI - 10.1002/srin.198305219
Subject(s) - austenite , materials science , carbide , metallurgy , grain boundary , microstructure , alloy , lath , high carbon , analytical chemistry (journal) , martensite , chemistry , chromatography
Structural investigations on powder samples of Fe‐0.02 C∼4 Mn‐1.0 Si (A1) and Fe‐0.02 C∼4 Mn‐1.0 Si (A2) steels in the heat treated condition by Debye‐Scherrer method to identify strengthening mechanisms and to assess possible formation of extraneous constituents. Results on the retention of austenite either singly or in combination with M 23 C 6 carbide. Detection of retained austenite even in as‐rolled samples of stells A1 and A2 (∼ 17 mm round) by X‐ray diffractometry. Discussion on 1. mechanism of austenite retention with regard to plausible locations, 2. likely impact on the microstructure of low‐carbon lath martensites and 3. influence on mechanical properties.