Analysis of Three UH-60 Blackhawk Servolink Components P/N 70400-08110-061

Abstract

The Processing and Properties Branch of the U.S. Army Research Laboratory's (ARL) Weapons and Materials Research Directorate examined the shot-peened surfaces of three UH-60 Blackhawk utility helicopter servolinks. It was purported that the surfaces of the components were damaged from a prior manufacturing operation. ARL performed visual and stereoscopic examination of the surface, measured the depth of some scratches, and quantified the residual stresses at the surface through x-ray diffraction in order to characterize the suspect components. In most cases, the scratches were shown to be present prior to the shot-peering operation. It was concluded that the parts exhibited evidence of overall peering, and the surface residual stresses were compressive and acceptable in areas varying in the degree of peering (i.e., pronounced peering dimples vs. less pronounced dimples).

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 2002
Accession Number
ADA398992

Entities

People

  • Daniel Snoha
  • James Catalano
  • Marc S. Pepi
  • Scott M. Grendahl
  • Victor Champagne

Organizations

  • United States Army Research Laboratory

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Absorption Coefficients
  • Analyzers
  • Coefficients
  • Diffraction
  • Helicopters
  • Manufacturing
  • Materials
  • Measurement
  • Mechanical Working
  • Military Research
  • Residual Stress
  • Residuals
  • Shot Peening
  • Stresses
  • Utility Aircraft
  • X Rays
  • X-Ray Diffraction

Readers

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