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Effect of Cu addition on microstructure and impact toughness in the simulated coarse-grained heat-affected zone of high-strength low-alloy steels

Huang, G.; Wan, X. L.; Wu, K. M.; Isayev, O.; Hress, O.; Rodionova, I. and Shirzadi, A. A. (2016). Effect of Cu addition on microstructure and impact toughness in the simulated coarse-grained heat-affected zone of high-strength low-alloy steels. Materials Science and Technology, 33(5) pp. 602–614.

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DOI (Digital Object Identifier) Link: https://doi.org/10.1080/02670836.2016.1238647
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Abstract

The effects of Cu content on microstructure and impact toughness in the simulated coarse-grained heat-affected zone (CGHAZ) of high-strength low-alloy steels were investigated. It has been observed that the microstructure in the simulated CGHAZ of Cu-free steel is dominated by a small proportion of acicular ferrite and predominantly bainite with martensite–austenite constituent. Whereas, in the 0.45 and 1.01% Cu-containing steels, the acicular ferrite increased significantly due to the effective nucleation on intragranular inclusions with outer layer of MnS and CuS. The formation of acicular ferrite is attributed to superior high heat-affected zone impact toughness in the 0.45% Cu-containing steel. Furthermore, the increasing martensite–austenite constituent and ε-Cu precipitates in the simulated CGHAZ of 1.01% Cu-containing steel caused degradation in impact toughness.

Item Type: Journal Item
Copyright Holders: 2016 Institute of Materials, Minerals and Mining
ISSN: 1743-2847
Project Funding Details:
Funded Project NameProject IDFunding Body
Not Set2014M550414China Postdoctoral Science Foundation
Not Set2015BHE008International Science and Technology Corporation Program of Hubei Province
Not Set2011DFR51040Central Government
Keywords: CGHAZ, Impact toughness, Acicular ferrite, M–A constituent, Cu precipitation
Academic Unit/School: Faculty of Science, Technology, Engineering and Mathematics (STEM) > Engineering and Innovation
Faculty of Science, Technology, Engineering and Mathematics (STEM)
Item ID: 53261
SWORD Depositor: Jisc Publications-Router
Depositing User: Jisc Publications-Router
Date Deposited: 08 Mar 2018 15:00
Last Modified: 02 May 2019 07:37
URI: http://oro.open.ac.uk/id/eprint/53261
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