Surface residual stress analysis of additive manufactured AlSi10Mg alloys

In Yeong Kim; Sang Cheol Park; Young Il Kim; Dae Kyeom Kim; Kee Ahn Lee; Soong Ju Oh; Bin Lee

doi:10.1016/j.jallcom.2023.169315

Surface residual stress analysis of additive manufactured AlSi10Mg alloys

In Yeong Kim, Sang Cheol Park, Young Il Kim, Dae Kyeom Kim, Kee Ahn Lee, Soong Ju Oh, Bin Lee

Department of Materials Science and Engineering

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

3 Citations (Scopus)

Abstract

AlSi10Mg is a representative aluminum alloy composition used in additive manufacturing (AM), with good mechanical properties and light weight. However, high energy in the PBF process to overcome heat reflectivity induces thermal gradients and residual stress (RS) in products. In this study, surface RS in AM AlSi10Mg alloy parts was characterized using various non-destructive methods. The results of X-ray diffraction-based analysis (Williamson–Hall plot, sin²ψ, and cos α methods) and nanoindentation method were compared. In addition, the electron channeling contrast imaging (ECCI) technique was used for observation of dislocations within precipitates generated and coarsened by heat treatment. In the case of build direction, the tensile RS (46–188 MPa) of in as-built samples changed to compressive RS (28–51 MPa) after heat treatment. All of the applied approaches produced consistent trends in the results, although the W-H plot and nanoindentation methods differed, and the reason for this was discussed.

Original language	English
Article number	169315
Journal	Journal of Alloys and Compounds
Volume	945
DOIs	https://doi.org/10.1016/j.jallcom.2023.169315
Publication status	Published - 2023 Jun 5

Keywords

Additive manufacturing
ECCI
Nanoindentation
Residual stress
XRD

ASJC Scopus subject areas

Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

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10.1016/j.jallcom.2023.169315

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title = "Surface residual stress analysis of additive manufactured AlSi10Mg alloys",

abstract = "AlSi10Mg is a representative aluminum alloy composition used in additive manufacturing (AM), with good mechanical properties and light weight. However, high energy in the PBF process to overcome heat reflectivity induces thermal gradients and residual stress (RS) in products. In this study, surface RS in AM AlSi10Mg alloy parts was characterized using various non-destructive methods. The results of X-ray diffraction-based analysis (Williamson–Hall plot, sin2ψ, and cos α methods) and nanoindentation method were compared. In addition, the electron channeling contrast imaging (ECCI) technique was used for observation of dislocations within precipitates generated and coarsened by heat treatment. In the case of build direction, the tensile RS (46–188 MPa) of in as-built samples changed to compressive RS (28–51 MPa) after heat treatment. All of the applied approaches produced consistent trends in the results, although the W-H plot and nanoindentation methods differed, and the reason for this was discussed.",

keywords = "Additive manufacturing, ECCI, Nanoindentation, Residual stress, XRD",

author = "Kim, {In Yeong} and Park, {Sang Cheol} and Kim, {Young Il} and Kim, {Dae Kyeom} and Lee, {Kee Ahn} and Oh, {Soong Ju} and Bin Lee",

note = "Funding Information: This work was supported by the Industrial Strategic Technology Development Program-Development of Material Component Technology ( 20001221 , “Development of high strength and fatigue resistance metal and manufacturing technology for root analogue dental implants” and 20013122 , “Development of manufacturing technology for casting mold for 3D cooling channels to improve the quality and productivity of automobile parts”) funded By the Ministry of Trade, Industry & Energy (MOTIE, Korea) and Korea Evaluation Institute of Industrial Technology (KEIT, Korea). Publisher Copyright: {\textcopyright} 2023 Elsevier B.V.",

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doi = "10.1016/j.jallcom.2023.169315",

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AU - Kim, In Yeong

AU - Park, Sang Cheol

AU - Kim, Young Il

AU - Kim, Dae Kyeom

AU - Lee, Kee Ahn

AU - Oh, Soong Ju

AU - Lee, Bin

N1 - Funding Information: This work was supported by the Industrial Strategic Technology Development Program-Development of Material Component Technology ( 20001221 , “Development of high strength and fatigue resistance metal and manufacturing technology for root analogue dental implants” and 20013122 , “Development of manufacturing technology for casting mold for 3D cooling channels to improve the quality and productivity of automobile parts”) funded By the Ministry of Trade, Industry & Energy (MOTIE, Korea) and Korea Evaluation Institute of Industrial Technology (KEIT, Korea). Publisher Copyright: © 2023 Elsevier B.V.

PY - 2023/6/5

Y1 - 2023/6/5

N2 - AlSi10Mg is a representative aluminum alloy composition used in additive manufacturing (AM), with good mechanical properties and light weight. However, high energy in the PBF process to overcome heat reflectivity induces thermal gradients and residual stress (RS) in products. In this study, surface RS in AM AlSi10Mg alloy parts was characterized using various non-destructive methods. The results of X-ray diffraction-based analysis (Williamson–Hall plot, sin2ψ, and cos α methods) and nanoindentation method were compared. In addition, the electron channeling contrast imaging (ECCI) technique was used for observation of dislocations within precipitates generated and coarsened by heat treatment. In the case of build direction, the tensile RS (46–188 MPa) of in as-built samples changed to compressive RS (28–51 MPa) after heat treatment. All of the applied approaches produced consistent trends in the results, although the W-H plot and nanoindentation methods differed, and the reason for this was discussed.

AB - AlSi10Mg is a representative aluminum alloy composition used in additive manufacturing (AM), with good mechanical properties and light weight. However, high energy in the PBF process to overcome heat reflectivity induces thermal gradients and residual stress (RS) in products. In this study, surface RS in AM AlSi10Mg alloy parts was characterized using various non-destructive methods. The results of X-ray diffraction-based analysis (Williamson–Hall plot, sin2ψ, and cos α methods) and nanoindentation method were compared. In addition, the electron channeling contrast imaging (ECCI) technique was used for observation of dislocations within precipitates generated and coarsened by heat treatment. In the case of build direction, the tensile RS (46–188 MPa) of in as-built samples changed to compressive RS (28–51 MPa) after heat treatment. All of the applied approaches produced consistent trends in the results, although the W-H plot and nanoindentation methods differed, and the reason for this was discussed.

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Surface residual stress analysis of additive manufactured AlSi10Mg alloys

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Keywords

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