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Journal of Failure Analysis and Prevention

, Volume 11, Issue 2, pp 123–128 | Cite as

Cracking of Aluminum Alloy Rivets Used in Space Application: A Metallurgical Investigation

  • Abhay K. Jha
  • K. Sreekumar
  • P. P. Sinha
Case History---Peer-Reviewed

Abstract

High strength AA 2024 aluminum alloys are used for riveting applications in the Indian space program. Due to rapid aging kinetics of this alloy the riveting operation must be completed within 30 min of the solution treatment. A new alloy, equivalent to Russian V65 aluminum alloy, emerged as being more suitable alloy for the rivet application because the natural aging process is significantly slower. This new alloy contains less magnesium than the AA 2024 alloy and the lower magnesium content decreases the aging kinetics because of the decreased vacancy concentration in the as-quenched alloy. However, recently, during riveting operations, few of the riveted heads showed cracks on the free bulged surface of head. The cracked heads of rivets were analyzed to understand the cause of cracking and this article highlights the details of the analysis.

Keywords

Rivet failure Failure analysis Spiral cracks 

Notes

Acknowledgments

The authors are indebted to Shri P.S. Veeraraghavan, Director, VSSC for permission to publish this work.

References

  1. 1.
    Starke E.A. Jr.: Alloying in Aluminium, p. 179. ASM, Metals Park, OH (1988)Google Scholar
  2. 2.
    Semiatin, S.L., Jonas, J.J.: Formability and Workability of Metals, p. 4. ASM, Metals Park, OH (1984)Google Scholar
  3. 3.
    Metals Hand Book, 8th edn., vol. 10, p. 92. ASM, Metals Park, OH (1975)Google Scholar
  4. 4.
    Metals Hand Book, 8th edn., vol. 9, p. 109. ASM, Metals Park, OH (1974)Google Scholar
  5. 5.
    Jha, A.K., SreeKumar, K., Arumugham, S.: Failure of AA 2024 aluminium alloy rivets. Prakt. Metallogr. 33(5), 264–272 (1996)Google Scholar

Copyright information

© ASM International 2010

Authors and Affiliations

  1. 1.Materials Characterisation Division, Materials and Metallurgy GroupVikram Sarabhai Space Centre, Indian Space Research OrganisationTrivandrumIndia
  2. 2.Materials and Mechanical EntityVikram Sarabhai Space Centre, Indian Space Research OrganisationTrivandrumIndia

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