Deformation behaviour of lath martensite in multi-phase steels. (1st January 2016)

• Record Type: Journal Article
• Authors: Maresca, F.; Kouznetsova, V.G.; Geers, M.G.D.
• Is Part Of: Scripta materialia. Volume 110(2016)
• Page Start: 74
• Page End: 77
• Publication Date: 2016-01-01
• Subjects: Lath martensite -- Interlath retained austenite -- High strength steels -- Dual phase steels -- Multi-phase steels; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2015.08.004
• Languages: English
• ISSNs: 1359-6462

Abstract

Graphical abstract: Abstract: This paper analyses the role of interlath retained austenite films within the martensite islands on the local strain partitioning and overall mechanical response of dual phase steels. A crystal plasticity-based modelling approach is thereby adopted. It is shown that the presence of a negligible (< 2 % ) volume fraction of interlath austenite amplifies the strain heterogeneity in both the martensite islands and the surrounding ferrite matrix. This qualitatively matches experimental observations from literature, showing a highly anisotropic, orientation dependent local mechanical response of martensite. The results emphasise the potential key role played by interlath austenite films in microstructures involving lath martensite.