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κ-carbide hardening in a low-density high-Al high-Mn multiphase steel

Lu, W.J.; Zhang, X.F. and Qin, Rongshan (2015). κ-carbide hardening in a low-density high-Al high-Mn multiphase steel. Materials Letters, 138 pp. 96–99.

DOI (Digital Object Identifier) Link: https://doi.org/10.1016/j.matlet.2014.09.104
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Abstract

κ-carbide hardening in a ferrite–austenite duplex low-density Fe–Mn–Al–C steel has been investigated as a function of annealing temperature in a range between 500 °C and 900 °C. Fine microstructure containing thin lamellar κ-carbides in austenite and dispersed nano-scale particulate κ-carbides in ferrite were formed in a temperature below 600 °C. This led to a high hardness. The steel was soften drastically at the higher annealing temperature. This is due to the formation of boundary κ-carbides, discontinuous coarsened κ-carbides, and spheroidized κ-carbides. The κ-carbides inside ferrite grain were transformed into austenite at 800 °C. The κ-carbides within austenite grain were dissolved at 900 °C. The κ-carbides are found to have a close to Nishiyama–Wasserman orientation relationship with the ferrite matrix.

Item Type: Journal Item
Copyright Holders: 2014 Elsevier B.V
ISSN: 0167-577X
Extra Information: lightweight steel; κ-carbide; hardening; decomposition; d-spacing
Academic Unit/School: Faculty of Science, Technology, Engineering and Mathematics (STEM) > Engineering and Innovation
Faculty of Science, Technology, Engineering and Mathematics (STEM)
Item ID: 41770
Depositing User: Rongshan Qin
Date Deposited: 22 Jan 2015 11:36
Last Modified: 29 Nov 2016 10:40
URI: http://oro.open.ac.uk/id/eprint/41770
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