Failure Analysis of a CH-47 Horizontal Hinge Pin Assembly, P/N 114RS226

Abstract

A CH-47D horizontal hinge pin assembly was examined to determine the root cause of ring and roller fracture and spalling. Chemical analyses, metallography, and hardness testing indicated that the rings and rollers conformed to the material requirements of the governing drawing. Metallography and visual and scanning electron microscopy indicated the failure likely initiated in the lag ring due to rolling contact fatigue because of high-service loads.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 2006
Accession Number
ADA459785

Entities

People

  • Gary Wechsler
  • Marc S. Pepi

Organizations

  • United States Army Research Laboratory

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Assembly
  • Chemical Analysis
  • Chemistry
  • Electron Microscopy
  • Electrons
  • Engineering
  • Failure Analysis
  • Failure Mode And Effect Analysis
  • Grain Size
  • Hardness
  • Materials
  • Metallography
  • Microscopy
  • Military Research
  • Roller Bearings
  • Scanning Electron Microscopy
  • Spectra

Fields of Study

  • Materials science

Readers

  • Electrical Engineering
  • Materials Science (Mechanical Engineering).
  • Mathematics or Statistics

Technology Areas

  • Microelectronics