β-Mn formation and aging effect on the fracture behavior of high-Mn low-density steels

The β-Mn formation behavior of high-Mn low-density steels was investigated in terms of the morphological characteristics and alloying element distribution after aging treatments. A dramatic difference in the formation kinetics and morphology of β-Mn was observed depending on the addition of Al, whic...

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Veröffentlicht in:Scripta materialia 2016-11, Vol.124, p.193-197
Hauptverfasser: Lee, Keunho, Park, Seong-Jun, Moon, Joonoh, Kang, Jun-Yun, Lee, Tae-Ho, Han, Heung Nam
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Sprache:eng
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Zusammenfassung:The β-Mn formation behavior of high-Mn low-density steels was investigated in terms of the morphological characteristics and alloying element distribution after aging treatments. A dramatic difference in the formation kinetics and morphology of β-Mn was observed depending on the addition of Al, which may increase the driving force for β-Mn formation. In addition, the effects of the aging process on the fracture behavior were examined in uniaxial tensile tests combined with microstructural observations. A severe loss of ductility resulted from the β-Mn formation and ordering of ferrite into the D03 phase, which was transformed before the β-Mn formation process.
ISSN:1359-6462
1872-8456
DOI:10.1016/j.scriptamat.2016.04.040