Case 54: Failure of Max Screws in Fuel-Injection Pumps
Fastening screws used in fuel-injection pumps failed during assembly and were examined to determine the cause. Based on observations and the result SEM fractography and hardness measurements, the screws failed by brittle intergranular fracture due to hydrogen embrittlement associated with plating procedures. The report includes recommendations for improving the quality of the screws.
Failure of Max Screws in Fuel-Injection Pumps, Failure Analysis of Engineering Structures: Methodology and Case Histories, By V. Ramachandran, A.C. Raghuram, R.V. Krishnan, S.K. Bhaumik, ASM International, 2005, p 196, https://doi.org/10.31399/asm.tb.faesmch.t51270196
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