Improved fatigue properties of laser powder bed fusion of Al–4.74Mg–0.70Sc–0.32Zr alloy via hot isostatic pressing

Zehao Qin; Nan Kang; Huajing Zong; Chunhui Zhan; Yanbo Fang; Zihong Wang; Mohamed El Mansori; Jing Chen; Xin Lin; Weidong Huang

doi:10.1080/21663831.2022.2088252

Improved fatigue properties of laser powder bed fusion of Al–4.74Mg–0.70Sc–0.32Zr alloy via hot isostatic pressing

Zehao Qin, Nan Kang, Huajing Zong, Chunhui Zhan, Yanbo Fang, Zihong Wang, Mohamed El Mansori, Jing Chen, Xin Lin, Weidong Huang

School of Materials Sience and Engineering

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

12 Scopus citations

Abstract

Laser powder bed fusion (L-PBF) processed components usually exhibit reduced fatigue performance owing to unavoidable defects at multiple scales, especially when the loading direction is parallel to the building direction. In this study, hot isostatic pressing (HIP) was applied to the L-PBFed Al-4.74Mg-0.70Sc-0.32Zr (wt.%) alloy to enhance the fatigue properties with a focus on the defect (porosities and inclusions) effects, compared with the direct-aged samples. The results demonstrated that HIP induced inconspicuous microstructural effects, but it healed the porosities and promoted oxidation. Therefore, the fatigue crack initiation transformed the oxide-associated porosity into an oxide, with a significant fatigue strength improvement.

Original language	English
Pages (from-to)	720-727
Number of pages	8
Journal	Materials Research Letters
Volume	10
Issue number	11
DOIs	https://doi.org/10.1080/21663831.2022.2088252
State	Published - 2022

Keywords

3D reconstruction
Al–Mg–Sc–Zr alloy
fatigue
hot isostatic pressing
laser powder bed fusion

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10.1080/21663831.2022.2088252

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@article{434e2c4a07fd4ddcbd2892290265cc6c,

title = "Improved fatigue properties of laser powder bed fusion of Al–4.74Mg–0.70Sc–0.32Zr alloy via hot isostatic pressing",

abstract = "Laser powder bed fusion (L-PBF) processed components usually exhibit reduced fatigue performance owing to unavoidable defects at multiple scales, especially when the loading direction is parallel to the building direction. In this study, hot isostatic pressing (HIP) was applied to the L-PBFed Al-4.74Mg-0.70Sc-0.32Zr (wt.%) alloy to enhance the fatigue properties with a focus on the defect (porosities and inclusions) effects, compared with the direct-aged samples. The results demonstrated that HIP induced inconspicuous microstructural effects, but it healed the porosities and promoted oxidation. Therefore, the fatigue crack initiation transformed the oxide-associated porosity into an oxide, with a significant fatigue strength improvement.",

keywords = "3D reconstruction, Al–Mg–Sc–Zr alloy, fatigue, hot isostatic pressing, laser powder bed fusion",

author = "Zehao Qin and Nan Kang and Huajing Zong and Chunhui Zhan and Yanbo Fang and Zihong Wang and {El Mansori}, Mohamed and Jing Chen and Xin Lin and Weidong Huang",

note = "Publisher Copyright: {\textcopyright} 2022 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group.",

year = "2022",

doi = "10.1080/21663831.2022.2088252",

language = "英语",

volume = "10",

pages = "720--727",

journal = "Materials Research Letters",

issn = "2166-3831",

publisher = "Taylor and Francis Ltd.",

number = "11",

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TY - JOUR

T1 - Improved fatigue properties of laser powder bed fusion of Al–4.74Mg–0.70Sc–0.32Zr alloy via hot isostatic pressing

AU - Qin, Zehao

AU - Kang, Nan

AU - Zong, Huajing

AU - Zhan, Chunhui

AU - Fang, Yanbo

AU - Wang, Zihong

AU - El Mansori, Mohamed

AU - Chen, Jing

AU - Lin, Xin

AU - Huang, Weidong

PY - 2022

Y1 - 2022

N2 - Laser powder bed fusion (L-PBF) processed components usually exhibit reduced fatigue performance owing to unavoidable defects at multiple scales, especially when the loading direction is parallel to the building direction. In this study, hot isostatic pressing (HIP) was applied to the L-PBFed Al-4.74Mg-0.70Sc-0.32Zr (wt.%) alloy to enhance the fatigue properties with a focus on the defect (porosities and inclusions) effects, compared with the direct-aged samples. The results demonstrated that HIP induced inconspicuous microstructural effects, but it healed the porosities and promoted oxidation. Therefore, the fatigue crack initiation transformed the oxide-associated porosity into an oxide, with a significant fatigue strength improvement.

AB - Laser powder bed fusion (L-PBF) processed components usually exhibit reduced fatigue performance owing to unavoidable defects at multiple scales, especially when the loading direction is parallel to the building direction. In this study, hot isostatic pressing (HIP) was applied to the L-PBFed Al-4.74Mg-0.70Sc-0.32Zr (wt.%) alloy to enhance the fatigue properties with a focus on the defect (porosities and inclusions) effects, compared with the direct-aged samples. The results demonstrated that HIP induced inconspicuous microstructural effects, but it healed the porosities and promoted oxidation. Therefore, the fatigue crack initiation transformed the oxide-associated porosity into an oxide, with a significant fatigue strength improvement.

KW - 3D reconstruction

KW - Al–Mg–Sc–Zr alloy

KW - fatigue

KW - hot isostatic pressing

KW - laser powder bed fusion

UR - http://www.scopus.com/inward/record.url?scp=85133233000&partnerID=8YFLogxK

U2 - 10.1080/21663831.2022.2088252

DO - 10.1080/21663831.2022.2088252

M3 - 文章

AN - SCOPUS:85133233000

SN - 2166-3831

VL - 10

SP - 720

EP - 727

JO - Materials Research Letters

JF - Materials Research Letters

IS - 11

ER -

Improved fatigue properties of laser powder bed fusion of Al–4.74Mg–0.70Sc–0.32Zr alloy via hot isostatic pressing

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Keywords

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