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Abstract

This case study involves two continuously cast steel crankshaft failures. Three parties performed their own failure analyses: (1) the engine manufacturer responsible for component design, specification, and application; (2) the steel supplier and forging supplier responsible for making the steel, forging the shape, and preliminary heat treatment; and (3) a supplier that provided induction hardening, finish machining, and inspection. An independent engineering firm was subsequently involved, but because each party had its own agenda, there was no agreement on the metallurgical source of the failure and thus no continued analysis to pin down and eliminate the root cause.

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D.A. Moore, K.F. Packer, A.J. Jones, D.M. Carlson, 2019. "Problematic Failure Analysis of a Cast Steel Crankshaft", ASM Failure Analysis Case Histories: Improper Maintenance, Repair, and Operating Conditions

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