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Fatigue and Fractographic Analysis of Artificially Aged 2618 Wrought Aluminum Alloy

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Abstract

Al2618 high-strength aluminum alloy was subjected to precipitation hardening at T6 tempering conditions to improve its mechanical properties for employing it as the spacecraft skin material. Nine specimens of Al2618 artificially aged alloy were prepared according to the ASTM-E606/E606M-12 standard and tested through the S-N curve method. It resulted in the fatigue strength of Al2618 being 150 MPa, which is better than the existing Al2024-T3 alloy by about 8.7%. An increment of 59.9% and 3.2% of fatigue life and fatigue strength for the infinite fatigue life of the alloy was identified through the Basquin Equation and Kohout-Věchet method, respectively, in correspondence with Al2024-T3. The fractographic analysis of the broken materials was investigated with the support of SEM images; the failure mechanism and causes for the failures were discussed.

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Author notes

  1. Ilamathi Palanivel and Balamurugan Kulendran are contributed equally to this work.

Authors and Affiliations

  1. Department of Production Engineering, Government College of Technology, Coimbatore, Tamil Nadu, 641013, India

    Arivumani Ravanan & Ilamathi Palanivel

  2. Department of Mechanical Engineering, KIT-Kalaignar Karunanidhi Institute of Technology, Coimbatore, Tamil Nadu, 641402, India

    Arivumani Ravanan

  3. Department of Mechanical Engineering, Government College of Engineering, Erode, Tamil Nadu, 638316, India

    Balamurugan Kulendran

Authors
  1. Arivumani Ravanan
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  2. Ilamathi Palanivel
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  3. Balamurugan Kulendran
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Contributions

The authors confirm contribution to the paper as follows: study conception and design were contributed by Arivumani Ravanan; data collection was contributed by Arivumani Ravanan; analysis and interpretation of results were contributed by Arivumani Ravanan; draft manuscript preparation was contributed by Ilamathi Palanivel and Balamurugan Kulendran. All authors reviewed the results and approved the final version of the manuscript.

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Correspondence to Arivumani Ravanan.

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Ravanan, A., Palanivel, I. & Kulendran, B. Fatigue and Fractographic Analysis of Artificially Aged 2618 Wrought Aluminum Alloy. Trans Indian Inst Met (2024). https://doi.org/10.1007/s12666-024-03335-7

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