Β-Mn formation and aging effect on the fracture behavior of high-Mn low-density steels. (November 2016)

• Record Type: Journal Article
• Authors: Lee, Keunho; Park, Seong-Jun; Moon, Joonoh; Kang, Jun-Yun; Lee, Tae-Ho; Han, Heung Nam
• Is Part Of: Scripta materialia. Volume 124(2016)
• Page Start: 193
• Page End: 197
• Publication Date: 2016-11
• Subjects: Low-density steel -- Aging -- Beta-manganese -- Morphological characteristics -- Fracture; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2016.04.040
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: 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.