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

SCRIPTA MATERIALIA

卷:159

Article

Sun, Shi-Hai^1,2  Ishimoto, Takuya^1,2  Hagihara, Koji^2,3  Tsutsumi, Yusuke⁴  Hanawa, Takao⁴  Nakano, Takayoshi^1,2 

[1] Osaka Univ, Grad Sch Engn, Div Mat & Mfg Sci, 2-1 Yamadaoka, Suita, Osaka 5650871, Japan

[2] Osaka Univ, Anisotrop Design & Addit Mfg Res Ctr, 2-1 Yamadaoka, Suita, Osaka 5650871, Japan

[3] Osaka Univ, Grad Sch Engn, Dept Adapt Machine Syst, 2-1 Yamadaoka, Suita, Osaka 5650871, Japan

[4] Tokyo Med & Dent Univ, Inst Biomat & Bioengn, Dept Metall Biomat, Chiyoda Ku, 2-3-10 Kanda Surugadai, Tokyo 1010062, Japan

关键词: Additive manufacturing;    Selective laser melting;    Texture;    Lamellae;    316L stainless steel;   

DOI  :  10.1016/j.scriptamat.2018.09.017

来源: Elsevier

【 摘 要 】

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 degrees 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. (C) 2018 Acta Materialia Inc. Published by Elsevier Ltd.

【 授权许可】

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