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

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 bu...

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Bibliographic Details
Published inScripta materialia Vol. 159; pp. 89 - 93
Main Authors Sun, Shi-Hai, Ishimoto, Takuya, Hagihara, Koji, Tsutsumi, Yusuke, Hanawa, Takao, Nakano, Takayoshi
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 15.01.2019
Subjects
316L stainless steel
Additive manufacturing
Lamellae
Selective laser melting
Texture
Lamellae
Additive manufacturing
316L stainless steel
Selective laser melting
Texture
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Summary: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. [Display omitted]
ISSN:1359-6462
1872-8456
DOI:10.1016/j.scriptamat.2018.09.017