Excellent mechanical and corrosion properties of austenitic stainless steel with a unique crystallographic lamellar microstructure via selective laser melting

• DOI: 10.1016/j.scriptamat.2018.09.017
• Publication Date: 2018-09-18T17:48:52Z
• Authors: Shi-Hai Sun; Takuya Ishimoto; Koji Hagihara; Yusuke Tsutsumi; Takao Hanawa; Takayoshi Nakano
• Keywords: Selective Laser Melting; Austenitic stainless steel

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