Anisotropic response of additively manufactured 316 L stainless steel towards low-temperature gaseous carburization

Yajian Feng; Han Duan; Zhenxu Zhao; Zhe Liu; Yawei Peng; Jianming Gong; Marcel A.J. Somers

doi:10.1016/j.surfcoat.2023.129874

Anisotropic response of additively manufactured 316 L stainless steel towards low-temperature gaseous carburization

Yajian Feng, Han Duan, Zhenxu Zhao, Zhe Liu, Yawei Peng, Jianming Gong, Marcel A.J. Somers

School of Mechanical and Power Engineering

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

3 Scopus citations

Abstract

In order to modify the surface properties of austenitic stainless steel fabricated by Laser Powder Bed Fusion (L-PBF), low-temperature gaseous carburization (LTGC) was employed. During LTGC, a carburized case of expanded austenite forms at the surface, which contains a high surface carbon content (∼2.5 wt%), high nano-hardness (∼12.6 GPa), large compressive residual stresses (from −2.4 GPa to −3.2 GPa), and is free of carbide precipitates. In the expanded austenite zones, different residual stresses were measured with X-ray diffractometry (XRD) for the top plane, i.e. in the plane perpendicular to the build direction, and for the side plane. This anisotropy is suggested to be caused by grain-shape anisotropy for the different specimen planes and inherent to the hierarchical microstructures resulting from L-PBF.

Original language	English
Article number	129874
Journal	Surface and Coatings Technology
Volume	470
DOIs	https://doi.org/10.1016/j.surfcoat.2023.129874
State	Published - 15 Oct 2023

Keywords

Additive manufacturing
Austenitic stainless steel
Hardness
Low-temperature gaseous carburization
Microstructure
Residual stress

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10.1016/j.surfcoat.2023.129874

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title = "Anisotropic response of additively manufactured 316 L stainless steel towards low-temperature gaseous carburization",

abstract = "In order to modify the surface properties of austenitic stainless steel fabricated by Laser Powder Bed Fusion (L-PBF), low-temperature gaseous carburization (LTGC) was employed. During LTGC, a carburized case of expanded austenite forms at the surface, which contains a high surface carbon content (∼2.5 wt%), high nano-hardness (∼12.6 GPa), large compressive residual stresses (from −2.4 GPa to −3.2 GPa), and is free of carbide precipitates. In the expanded austenite zones, different residual stresses were measured with X-ray diffractometry (XRD) for the top plane, i.e. in the plane perpendicular to the build direction, and for the side plane. This anisotropy is suggested to be caused by grain-shape anisotropy for the different specimen planes and inherent to the hierarchical microstructures resulting from L-PBF.",

keywords = "Additive manufacturing, Austenitic stainless steel, Hardness, Low-temperature gaseous carburization, Microstructure, Residual stress",

author = "Yajian Feng and Han Duan and Zhenxu Zhao and Zhe Liu and Yawei Peng and Jianming Gong and Somers, {Marcel A.J.}",

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doi = "10.1016/j.surfcoat.2023.129874",

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T1 - Anisotropic response of additively manufactured 316 L stainless steel towards low-temperature gaseous carburization

AU - Feng, Yajian

AU - Duan, Han

AU - Zhao, Zhenxu

AU - Liu, Zhe

AU - Peng, Yawei

AU - Gong, Jianming

AU - Somers, Marcel A.J.

PY - 2023/10/15

Y1 - 2023/10/15

N2 - In order to modify the surface properties of austenitic stainless steel fabricated by Laser Powder Bed Fusion (L-PBF), low-temperature gaseous carburization (LTGC) was employed. During LTGC, a carburized case of expanded austenite forms at the surface, which contains a high surface carbon content (∼2.5 wt%), high nano-hardness (∼12.6 GPa), large compressive residual stresses (from −2.4 GPa to −3.2 GPa), and is free of carbide precipitates. In the expanded austenite zones, different residual stresses were measured with X-ray diffractometry (XRD) for the top plane, i.e. in the plane perpendicular to the build direction, and for the side plane. This anisotropy is suggested to be caused by grain-shape anisotropy for the different specimen planes and inherent to the hierarchical microstructures resulting from L-PBF.

AB - In order to modify the surface properties of austenitic stainless steel fabricated by Laser Powder Bed Fusion (L-PBF), low-temperature gaseous carburization (LTGC) was employed. During LTGC, a carburized case of expanded austenite forms at the surface, which contains a high surface carbon content (∼2.5 wt%), high nano-hardness (∼12.6 GPa), large compressive residual stresses (from −2.4 GPa to −3.2 GPa), and is free of carbide precipitates. In the expanded austenite zones, different residual stresses were measured with X-ray diffractometry (XRD) for the top plane, i.e. in the plane perpendicular to the build direction, and for the side plane. This anisotropy is suggested to be caused by grain-shape anisotropy for the different specimen planes and inherent to the hierarchical microstructures resulting from L-PBF.

KW - Additive manufacturing

KW - Austenitic stainless steel

KW - Hardness

KW - Low-temperature gaseous carburization

KW - Microstructure

KW - Residual stress

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U2 - 10.1016/j.surfcoat.2023.129874

DO - 10.1016/j.surfcoat.2023.129874

M3 - 文章

AN - SCOPUS:85166734929

SN - 0257-8972

VL - 470

JO - Surface and Coatings Technology

JF - Surface and Coatings Technology

M1 - 129874

ER -

Anisotropic response of additively manufactured 316 L stainless steel towards low-temperature gaseous carburization

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Keywords

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