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

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

Original Reports | 更新时间：2026-08-19

- Improved fatigue properties of laser powder bed fusion of Al–4.74Mg–0.70Sc–0.32Zr alloy via hot isostatic pressing
- Materials Research Letters Vol. 10, Issue 11, Pages: 720-727(2022)
- 作者机构：
  
  1. b Key Laboratory of Metal High Performance Additive Manufacturing and Innovative Design MIIT China Northwestern Polytechnical University
  2. a State Key Laboratory of Solidification Processing Northwestern Polytechnical University Xi’an People’s Republic of China
  3. b Key Laboratory of Metal High Performance Additive Manufacturing and Innovative Design MIIT China Northwestern Polytechnical University Xi'an People’s Republic of China
  4. a State Key Laboratory of Solidification Processing Northwestern Polytechnical University
  5. d Sichuan Aerospace Chuannan Initiating Explosive Technology Limited
  6. c Arts et Métiers Institute of Technology MSMP HESAM Universite
- 作者简介：
- 基金信息：
- DOI：10.1080/21663831.2022.2088252
  CLC：
- Online First：29 June 2022，
  
  Published：2022
- 稿件说明：
移动端阅览
Zehao Qin, Nan Kang, Huajing Zong, et al. Improved fatigue properties of laser powder bed fusion of Al–4.74Mg–0.70Sc–0.32Zr alloy via hot isostatic pressing[J]. Materials Research Letters, 2022, 10(11): 720-727.
DOI：

Zehao Qin, Nan Kang, Huajing Zong, et al. Improved fatigue properties of laser powder bed fusion of Al–4.74Mg–0.70Sc–0.32Zr alloy via hot isostatic pressing[J]. Materials Research Letters, 2022, 10(11): 720-727. DOI： 10.1080/21663831.2022.2088252.

摘要

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.

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Related Institution

a Erich Schmid Institute of Materials Science Austrian Academy of Sciences

b Institute of Materials Science Joining and Forming Graz University of Technology

a School of Materials Science and Engineering University of Science and Technology of China Shenyang People’s Republic of China

b Shi-changxu Innovation Center for Advanced Materials Institute of Metal Research Chinese Academy of Sciences

a Shenyang National Laboratory for Materials Science Institute of Metal Research Chinese Academy of Sciences Shenyang People’s Republic of China

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