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Journal of Materials Engineering and Performance

Erschienen in:

01.04.2014

Microstructural Evolution and Deformation Behavior of a Hot-Rolled and Heat Treated Fe-8Mn-4Al-0.2C Steel

verfasst von: Zhihui Cai, Hua Ding, Zhengyan Ying, R. D. K. Misra

Erschienen in: Journal of Materials Engineering and Performance | Ausgabe 4/2014

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Abstract

The microstructural evolution following tensile deformation of a hot-rolled and heat treated Fe-8Mn-4Al-0.2C steel was studied. Quenching in the range of 750-800 °C followed by tempering at 200 °C led to a ferrite-austenite mixed microstructure that was characterized by excellent combination of tensile strength of 800-1000 MPa and elongation of 30-40%, and a three-stage work hardening behavior. During the tensile deformation, the retained austenite transformed into martensite and delayed the onset of necking, thus leading to a higher ductility via the transformation-induced plasticity (TRIP) effect. The improvement of elongation is attributed to diffusion of carbon from δ-ferrite to austenite during tempering, which improves the stability of austenite, thus contributing to enhanced tensile ductility.

Vorheriger Artikel Effect of Preweld Heat Treatment on the Microstructure of Heat-Affected Zone (HAZ) and Weldability of Inconel 939 Superalloy

Nächster Artikel Determination of Proper Austenitization Temperatures for Hot Stamping of AISI 4140 Steel

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Titel: Microstructural Evolution and Deformation Behavior of a Hot-Rolled and Heat Treated Fe-8Mn-4Al-0.2C Steel
verfasst von: Zhihui Cai
Hua Ding
Zhengyan Ying
R. D. K. Misra
Publikationsdatum: 01.04.2014
Verlag: Springer US
Erschienen in: Journal of Materials Engineering and Performance / Ausgabe 4/2014
Print ISSN: 1059-9495
Elektronische ISSN: 1544-1024
DOI: https://doi.org/10.1007/s11665-014-0866-2

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