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<p>This study presents the results of fatigue testing and fractographic analysis conducted on a novel series of high-strength aluminium alloys designed as replacements for the Al2024-T3 alloy. The specimens of the proposed alloy Al2618-T7 were tested for its microstructural properties, where Jeffries’ planimetric method and circular intercept methods were applied to measure the grain size. The respective specimens of ASTM standards underwent tensile testing as well as the fatigue testing. Wholer’s (S-N) curve method, Basquine equation and Kohout-Věchet methods were employed for determining the basic fatigue properties of the materials. The fundamental outcomes from Al2618-T7 were compared to those of Al2016-T6, Al2016-T7, Al2618-T6, and Al2024 alloys to assess their feasibility for use as a space shuttle skin alloy.</p>

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Fatigue and fractographic analysis of Al2618 overaged wrought aluminium alloy

  • 期刊论文

  • 发表日期：

    2025年5月31日

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  • Arivumani Ravanan,
  • Ilamathi Palanivel,
  • Balamurugan Kulendran,
  • Palanisamy Murugesan

摘要

This study presents the results of fatigue testing and fractographic analysis conducted on a novel series of high-strength aluminium alloys designed as replacements for the Al2024-T3 alloy. The specimens of the proposed alloy Al2618-T7 were tested for its microstructural properties, where Jeffries’ planimetric method and circular intercept methods were applied to measure the grain size. The respective specimens of ASTM standards underwent tensile testing as well as the fatigue testing. Wholer’s (S-N) curve method, Basquine equation and Kohout-Věchet methods were employed for determining the basic fatigue properties of the materials. The fundamental outcomes from Al2618-T7 were compared to those of Al2016-T6, Al2016-T7, Al2618-T6, and Al2024 alloys to assess their feasibility for use as a space shuttle skin alloy.