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Published in: Metallurgical and Materials Transactions A 5/2015

01-05-2015

Effect of Close-Packed Plane Boundaries in a Bain Zone on the Crack Path in Simulated Coarse-Grained HAZ of Bainitic Steel

Authors: Hidenori Terasaki, Yutaro Shintome, Yu-ichi Komizo, Mitsuru Ohata, Koji Moriguchi, Yusaku Tomio

Published in: Metallurgical and Materials Transactions A | Issue 5/2015

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Abstract

Global effect of Bain-zone boundaries and the local effect of close-packed plane (CP) boundaries on the path of secondary cleavage cracks (observed on a fractured V-notch Charpy specimen) were visualized and discussed in simulated coarse-grained HAZ of bainitic steel. Microstructural unit map (Bain-zone map and CP map) was obtained by electron backscatter diffraction method for a prior austenite grain of a few hundred micrometers. Furthermore, a correlation between CP boundaries and sites that favored formation of the blocky martensite–austenite (M–A) constituent was confirmed. It was clarified that two crack deviation/local changing factors (CP boundaries and blocky M–A) are paired.

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Metadata
Title
Effect of Close-Packed Plane Boundaries in a Bain Zone on the Crack Path in Simulated Coarse-Grained HAZ of Bainitic Steel
Authors
Hidenori Terasaki
Yutaro Shintome
Yu-ichi Komizo
Mitsuru Ohata
Koji Moriguchi
Yusaku Tomio
Publication date
01-05-2015
Publisher
Springer US
Published in
Metallurgical and Materials Transactions A / Issue 5/2015
Print ISSN: 1073-5623
Electronic ISSN: 1543-1940
DOI
https://doi.org/10.1007/s11661-015-2817-4

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