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Influence of κ-carbide interface structure on the formability of lightweight steels

Lu, W.J. and Qin, R.S. (2016). Influence of κ-carbide interface structure on the formability of lightweight steels. Materials & Design, 104 pp. 211–216.

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κ-carbide (κ) in high aluminium (Al) steels is grown from austenite (γ) via γ → γ + κ or γ → α + κ (α represents ferrite), and is a lamellar structure. This work demonstrates that the formability of high Al lightweight steels is affected by the lattice misfit and interface shape between κ and matrix. The cold workability can be improved by either to change the steel chemical constitution or to implement an electro-thermo-mechanical process. For ferrite-matrix-based high Al steel, electric-current promotes the spheroidization and refinement of κ structure and reduces volume fraction of κ phase. This retards the crack nucleation and propagation, and hence improves the materials formability. The observation is caused by a direct effect of electric-current rather than side effects.

Item Type: Journal Item
Copyright Holders: 2016 Elsevier
ISSN: 0261-3069
Project Funding Details:
Funded Project NameProject IDFunding Body
Not SetEP/J011460/2EPSRC
Not SetEP/L00030X/1EPSRC
Not SetNA150320The Royal Society Newton Advanced Fellowship
Keywords: cracking; microstructure; κ-carbide; lightweight 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: 46243
Depositing User: Rongshan Qin
Date Deposited: 10 May 2016 10:42
Last Modified: 29 May 2019 14:19
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