ASM Failure Analysis Case Histories: Failure Modes and Mechanisms
Failure of Carburized Steel Impeller Drive Gears Due to Pitting and a Wear Pattern
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Published:2019
Abstract
Two intermediate impeller drive gears (made of AMS 6263 steel, gas carburized, hardened, and tempered) exhibited evidence of pitting and abnormal wear after production tests in test-stand engines. The gears were examined for hardness, case depth, and microstructure of case and core. It was found that gear 1 had a lower hardness than specified while the case hardness of gear 2 was found to be within limits. Both the pitting and the wear pattern were revealed to be more severe on gear 1 than on gear 2. Surface-contact fatigue (pitting) of gear 1 (cause of lower carbon content of...
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Member Sign InFailure of Carburized Steel Impeller Drive Gears Due to Pitting and a Wear Pattern, ASM Failure Analysis Case Histories: Failure Modes and Mechanisms, ASM International, 2019, https://doi.org/10.31399/asm.fach.modes.c0048253
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