Suppressed martensitic transformation under biaxial loading in low stacking fault energy metastable austenitic steels. (1st April 2018)

• Record Type: Journal Article
• Authors: Polatidis, E.; Hsu, W.-N.; Šmíd, M.; Panzner, T.; Chakrabarty, S.; Pant, P.; Van Swygenhoven, H.
• Is Part Of: Scripta materialia. Number 147(2018)
• Page Start: 27
• Page End: 32
• Publication Date: 2018-04-01
• Subjects: Metastable stainless steel -- Martensite -- TRIP -- Stacking fault -- Partial dislocations; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2017.12.026
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: The effect of uniaxial/biaxial loading on the martensitic transformation of a low stacking fault energy, metastable austenitic stainless steel was studied by in-situ neutron diffraction on cruciform-shaped/dogbone samples. Uniaxial loading favors the martensitic transformation following the sequence γ → ε → α′, where at low strains ε-martensite is the precursor of α′. During equibiaxial-loading, the evolving texture suppresses the formation of ε-martensite and considerably less α′-martensite is observed at high strains. The results are discussed with respect to the deformation textures, the loading direction and the mechanism of the ε-martensite transformation. Graphical abstract: Image 2