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

Shi Hai Sun; Takuya Ishimoto; Koji Hagihara; Yusuke Tsutsumi; Takao Hanawa; Takayoshi Nakano

doi:10.1016/j.scriptamat.2018.09.017

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

Shi Hai Sun, Takuya Ishimoto, Koji Hagihara, Yusuke Tsutsumi, Takao Hanawa, Takayoshi Nakano^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

296 Citations (Scopus)

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.

Original language	English
Pages (from-to)	89-93
Number of pages	5
Journal	Scripta Materialia
Volume	159
DOIs	https://doi.org/10.1016/j.scriptamat.2018.09.017
Publication status	Published - 15 Jan 2019
Externally published	Yes

Keywords

316L stainless steel
Additive manufacturing
Lamellae
Selective laser melting
Texture

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10.1016/j.scriptamat.2018.09.017

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

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.",

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AU - Sun, Shi Hai

AU - Ishimoto, Takuya

AU - Hagihara, Koji

AU - Tsutsumi, Yusuke

AU - Hanawa, Takao

AU - Nakano, Takayoshi

PY - 2019/1/15

Y1 - 2019/1/15

N2 - 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.

AB - 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.

KW - 316L stainless steel

KW - Additive manufacturing

KW - Lamellae

KW - Selective laser melting

KW - Texture

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DO - 10.1016/j.scriptamat.2018.09.017

M3 - Article

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VL - 159

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JO - Scripta Materialia

JF - Scripta Materialia

ER -

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

Abstract

Keywords

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