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ASM Failure Analysis Case Histories

Handbook of Case Histories in Failure Analysis

Edited by
Khlefa A. Esaklul
Khlefa A. Esaklul
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ASM International
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Book Chapter

Surface Damage on a Transfer Gear Shaft

Carmine D'Antonio
Carmine D'Antonio
Department of Metallurgy and Materials Science, Polytechnic University
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Page range:
299 - 300


An AISI 4320 H transfer gear shaft that was part of a transmission sustained severe surface damage after 12 h of dynamometer testing at various gearing and torque loads. The damage was characterized by generalized wear and spalling. Examination of a cross section of the shaft that intersected undamaged, burnished, and surface-spalled zones revealed no anomalies in the chemistry, microstructure, or hardness that could have caused the damage. The physical evidence suggested that the operable mechanism was contact fatigue caused by misalignment of the shaft in the assembly.

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Carmine D'Antonio, 1992. "Surface Damage on a Transfer Gear Shaft", Handbook of Case Histories in Failure Analysis, Khlefa A. Esaklul

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