Martensite size effects on damage in quenching and partitioning steels. (September 2017)

• Record Type: Journal Article
• Authors: Wang, M.-M.; Hell, J.-C.; Tasan, C.C.
• Is Part Of: Scripta materialia. Number 138(2017)
• Page Start: 1
• Page End: 5
• Publication Date: 2017-09
• Subjects: EBSD -- DIC -- In-situ -- Lath -- Strain partitioning; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2017.05.021
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: Quenching and partitioning steels create new opportunities for light-weight automotive component design, however, a deeper understanding of microstructural damage and failure mechanisms is essential to improve these materials. Here we study the strain partitioning and damage behavior of these steels by carrying out in-situ high resolution microstructure and micro-strain mapping experiments. These investigations reveal that the presence of coarse martensite laths leads to early strain localization, especially when they are in the vicinity of untempered martensite islands. Future alloy design and heat treatment design efforts should thus particularly focus on eliminating copresence of coarse martensite laths and untempered martensite. Graphical abstract: