Failure Analysis of a Cracked UH-1 Tailboom Former, P/N 205-030-807-97

Abstract

The U.S. Army Aviation and Missile Command sent the U.S. Army Research Laboratory Weapons and Materials Research Directorate a UH-1 tailboom former (P/N 201030-807-97) from the U.S. Army Kwajalein Atoll Facility (USAKA) in the Marshall Islands for investigation. The component was being investigated due to the presence of cracks observed near bolt hole locations on the part. This component was quality deficient report exhibit number M24H90327. The material utilized to manufacture the former was specified to be clad 2024-T4 aluminum alloy sheet in accordance with QQ-A-362. It was superseded by QQ-A-250/5B, which was subsequently cancelled, and superseded by the current specification for clad 2024-T4 aluminum sheet, SAE-AMS-QQ-A-250-5. The part was characterized through nondestructive inspection, chemical analysis, optical microscopy, scanning electron microscopy, and mechanical testing.

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 2006
Accession Number
ADA451358

Entities

People

  • Benjamin Hardisky
  • Russell Yocum
  • Scott M. Grendahl

Organizations

  • United States Army Research Laboratory

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Alloys
  • Aluminum
  • Aluminum Alloys
  • Army Aviation
  • Chemical Analysis
  • Chromium Compounds
  • Eddy Currents
  • Electron Microscopy
  • Electrons
  • Failure Analysis
  • Inspection
  • Materials
  • Microscopy
  • Military Research
  • Scanning Electron Microscopy
  • Specifications
  • Test Methods

Readers

  • Facility/Structural Engineering.
  • Metallurgy
  • ballistics.

Technology Areas

  • Microelectronics
  • Microelectronics - Graphene