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Analysis investigation of prior austenite grain size dependence of low temperature toughness in steel weld metal

Zhang, X. F.; Han, P.; Terasaki, H.; Sato, M. and Komizo, Y. (2012). Analysis investigation of prior austenite grain size dependence of low temperature toughness in steel weld metal. Journal of Materials Science &Technology, 28(3) pp. 241–248.

DOI (Digital Object Identifier) Link: https://doi.org/10.1016/S1005-0302(12)60048-6
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Abstract

Prior austenite grain size dependence of the low temperature impact toughness has been addressed in the bainitic weld metals by in situ observations. Usually, decreasing the grain size is the only approach by which both the strength and the toughness of a steel are increased. However, low carbon bainitic steel with small grain size shows a weakening of the low temperature impact toughness in this study. By direct tracking of the morphological evolution during phase transformation, it is found that large austenite grain size dominates the nucleation of intragranular acicular ferrite, whereas small austenite grain size leads to grain boundary nucleation of bainite. This kinetics information will contribute to meet the increasing low temperature toughness requirement of weld metals for the storage tanks and offshore structures.

Item Type: Journal Item
Copyright Holders: 2012 The Chinese Society for Metals
Keywords: in situ observation; prior austenite grain size; low temperature toughness; intragranular nucleation; grain boundary nucleation
Academic Unit/School: Faculty of Science, Technology, Engineering and Mathematics (STEM) > Engineering and Innovation
Faculty of Science, Technology, Engineering and Mathematics (STEM)
Item ID: 41911
Depositing User: Xinfang Zhang
Date Deposited: 11 Feb 2015 14:18
Last Modified: 04 Oct 2016 11:42
URI: http://oro.open.ac.uk/id/eprint/41911
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