Excellent combination of strength and ductility in an Fe–9Al–28Mn–1.8C alloy

An optimal aging at 450 °C resulting in the subject alloy possessing a high yield strength of 1383 MPa with 32.5% elongation. With almost equivalent elongation, the yield strength was about 28% higher than that of FeAlMnC (C ≦ 1.3 wt.%) alloys after solution heat-treatment or controlled-rolling foll...

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Bibliographic Details
Published inScripta materialia Vol. 63; no. 2; pp. 162 - 165
Main Authors Chang, K.M., Chao, C.G., Liu, T.F.
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 01.07.2010
Subjects
Carbides
FeAlMnC alloy
Mechanical properties
Microstructure
Spinodal decomposition
Mechanical properties
Microstructure
Carbides
Spinodal decomposition
FeAlMnC alloy
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ISSN1359-6462
1872-8456
DOI10.1016/j.scriptamat.2010.03.038

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Summary:An optimal aging at 450 °C resulting in the subject alloy possessing a high yield strength of 1383 MPa with 32.5% elongation. With almost equivalent elongation, the yield strength was about 28% higher than that of FeAlMnC (C ≦ 1.3 wt.%) alloys after solution heat-treatment or controlled-rolling followed by optimal aging. Additionally, due to pre-existing fine (Fe,Mn) 3AlC carbides in as-quenched alloy, the aging time required for attaining the optimal combination of strength and ductility was much less than that for FeAlMnC (C ≦ 1.3 wt.%) alloys.
ISSN:1359-6462
1872-8456
DOI:10.1016/j.scriptamat.2010.03.038