Excellent mechanical and corrosion properties of austenitic stainless steel with a unique crystallographic lamellar microstructure via selective laser melting. (15th January 2019)

• Record Type: Journal Article
• Authors: Sun, Shi-Hai; Ishimoto, Takuya; Hagihara, Koji; Tsutsumi, Yusuke; Hanawa, Takao; Nakano, Takayoshi
• Is Part Of: Scripta materialia. Number 159(2019)
• Page Start: 89
• Page End: 93
• Publication Date: 2019-01-15
• Subjects: Additive manufacturing -- Selective laser melting -- Texture -- Lamellae -- 316L stainless steel; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2018.09.017
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: We first developed a unique "crystallographic lamellar microstructure" (CLM), in which two differently oriented grains appear alternately, in a 316L stainless steel specimen via selective laser melting technology. The CLM was composed of major 〈011〉 grains and minor 〈001〉 grains aligned along the build direction, which stemmed from vertical and approximately ±45° inclined columnar cells formed in the central and side parts of melt-pools, respectively. The development of CLM was found to largely improve the material properties via the strengthening of the product, simultaneously showing superior corrosion resistance to commercially obtained specimens. Graphical abstract: Unlabelled Image