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Role of Metallographic Analysis in the Identification of Location of Crack Initiation in a Burst Tested AA 2219 Propellant Tank

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Abstract

Owing to its excellent combination of weldability and strength at low temperatures (up to 4 K), aluminum alloy AA 2219 is the material of choice for the design of propellant tanks for cryogenic engines of satellite launch vehicles. In order to assess the design margins available, one propellant tank has been subjected to burst test. This paper highlights the role of microstructural analysis conducted on the burst tested propellant tank in locating the origin of crack initiation. Specimens collected from different locations of the burst tested tank have been subjected to optical microscopy and scanning electron microscopy to locate the origin of crack initiation.

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Acknowledgments

Authors sincerely wish to thank the designers of the tank, structural testing team at INSTEF, VSSC. They wish to thank Project Director, LVM3 project for his kind support. They wish to thank the Director, VSSC for granting permission to publish this work.

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Authors and Affiliations

  1. Materials and Metallurgy Group, Material Characterization Division, Vikram Sarabhai Space Centre, Trivandrum, 695 022, India

    S. V. S. Narayana Murty, Sushant K. Manwatkar & P. Ramesh Narayanan

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  1. S. V. S. Narayana Murty
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  2. Sushant K. Manwatkar
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  3. P. Ramesh Narayanan
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Correspondence to S. V. S. Narayana Murty.

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Murty, S.V.S.N., Manwatkar, S.K. & Narayanan, P.R. Role of Metallographic Analysis in the Identification of Location of Crack Initiation in a Burst Tested AA 2219 Propellant Tank. Metallogr. Microstruct. Anal. 4, 392–402 (2015). https://doi.org/10.1007/s13632-015-0223-3

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  • DOI: https://doi.org/10.1007/s13632-015-0223-3

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