Slip transmission and voiding during slip band Intersections in Fe70Ni10Cr20 stainless steel. (November 2022)

• Record Type: Journal Article
• Authors: Zhou, X.W.; Skelton, R.; Sills, R.B.; Marchi, C. San
• Is Part Of: Scripta materialia. Number 220(2022)
• Publication Date: 2022-11
• Subjects: Molecular dynamics -- Hydrogen embrittlement -- Deformation structure -- Fracture -- Slip; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2022.114925
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: Slip blockage during slip band intersections impacts mechanical properties of crystalline materials. Molecular dynamics simulations of eight band intersections in Fe70 Ni10 Cr20 alloys revealed that secondary bands always transmit into ε bands more easily than into twin bands. While this is surprising because the ε-phase has a different crystal structure from the matrix, our finding that twins do not possess easy crystallographic pathways for transmission explains this phenomenon. We also found that the band intersection regions preferentially nucleate voids. These findings provide understanding of the deformation and damage behavior of FCC metals. For example, since hydrogen promotes ε-bands, our findings can help understand hydrogen compatibility. Graphical abstract: Image, graphical abstract