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Cluster bomb tailcone assemblies each containing two aluminum die-cast components were rejected because of the poor surface condition of the die castings. Numerous heat checks were found on the surfaces of the tailcones and radiographic inspection revealed inclusions, gas holes, and shrinkage defects in the castings. Most of the components failed to meet required mechanical properties because of these casting defects.

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M. Pepi, Failure of Die Cast Aluminum Cluster Bomb Tailcone Assemblies, ASM Failure Analysis Case Histories: Processing Errors and Defects, ASM International, 2019,

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