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Multiaxial Non-proportional Low Cycle Fatigue Properties of HIPped A319 Cast Aluminum Alloy
  • +6
  • Bin Ge,
  • Xiaoshan Liu,
  • Guoqiu He,
  • Peiwen Le,
  • Zhiqiang Zhou,
  • Jiaqi Pan,
  • Ziao Huang,
  • Jingquan Li,
  • Qigui Wang
Xiaoshan Liu
Tongji University
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Guoqiu He
Tongji University
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Peiwen Le
Tongji University
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Zhiqiang Zhou
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Ziao Huang
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Jingquan Li
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Qigui Wang
General Motors Corp
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Abstract

This paper describes a microstructure-based multiaxial non-proportional fatigue life prediction model with maximum shear strain and non-proportionality as damage parameters applied to A319 alloy. The materials made with different casting cooling rates and Sr modification are characterized and quantified in terms of secondary dendrite arm spacing (SDAS), size and aspect ratio of eutectic Si particles. Multiaxial non-proportional fatigue tests have been performed on six groups of A319 alloys to systematically analyze the effect of microstructure and loading path on the fatigue properties of Al-Si cast alloy. The first part of the paper is focused on microstructure quantitative characterization to determine the influence of different casting conditions, followed by stress response behavior and fatigue fracture analysis. Finally, quantitative relationship between six fatigue life parameters and microstructure characteristics is established and a new fatigue life prediction model is proposed to predict fatigue life of Al-Si alloy under multiaxial non-proportional loading condition.

Peer review status:ACCEPTED

08 Feb 2021Submitted to Fatigue & Fracture of Engineering Materials & Structures
10 Feb 2021Submission Checks Completed
10 Feb 2021Assigned to Editor
12 Feb 2021Reviewer(s) Assigned
06 Mar 2021Review(s) Completed, Editorial Evaluation Pending
10 Mar 2021Editorial Decision: Revise Major
04 May 20211st Revision Received
05 May 2021Submission Checks Completed
05 May 2021Assigned to Editor
05 May 2021Reviewer(s) Assigned
05 May 2021Review(s) Completed, Editorial Evaluation Pending
07 May 2021Editorial Decision: Accept