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Refinement of retained austenite in super-bainitic steel by a deep cryogenic treatment

Hu, Feng; Wu, Kaiming; Hodgson, Peter Damian and Shirzadi, Amir Abbas (2014). Refinement of retained austenite in super-bainitic steel by a deep cryogenic treatment. ISIJ International, 54(1) pp. 222–226.

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DOI (Digital Object Identifier) Link: https://doi.org/10.2355/isijinternational.54.222
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Abstract

The effect of a deep cryogenic treatment on the microstructure of a super-bainitic steel was investigated. It was shown that quenching the super-bainitc steel in –196°C liquid nitrogen resulted in the transformation of retained austenite to two phases: ~20 nm thick martensite films and some nano carbides with a ~25 nm diameter. Some refinement of the retained austenite occurred, due to formation of fine martensite laths within the retained austenite. The evolution of these new phases resulted in an increase in the average hardness of the super-bainitic steel from 641 to ~670 HV1.

Item Type: Journal Item
Copyright Holders: 2014 ISIJ
ISSN: 0915-1559
Project Funding Details:
Funded Project NameProject IDFunding Body
Not SetNot SetWuhan University of Science & Technology
Keywords: cryogenic treatment; retained austenite; martensite; super-bainitic steel.
Academic Unit/School: Faculty of Science, Technology, Engineering and Mathematics (STEM) > Engineering and Innovation
Faculty of Science, Technology, Engineering and Mathematics (STEM)
Item ID: 44230
Depositing User: Amir Shirzadi
Date Deposited: 01 Sep 2015 09:03
Last Modified: 07 Apr 2017 04:03
URI: http://oro.open.ac.uk/id/eprint/44230
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