Retrogression and Re-Ageing In-Service Demonstrator Reliability Trials: Stage 3 Component Test Report

Abstract

Retrogression and Re-ageing (RRA) technology is a two stage heat treatment of 7075-T6 aluminium alloy used to improve corrosion resistance while retaining MIL-HDBK-5J structural properties. This report assesses the compliance of the reliability trials, conducted at Boeing Australia Component Repairs (BACR) in August 2010, with the requirements of the compliance matrix in the Stage III Design Development Plan and, by extension, the Stage III Process Specification for RRA. All properties described by items in the compliance matrix received recommended ratings of either 'Compliant' or 'Non-Compliant (Acceptable)'. Of the 15 items in the compliance matrix only four were rated 'Non-Compliant (Acceptable)'.The trials demonstrated that the RRA process as defined in the Stage III Process Specification can be reliabily applied to an aircraft component in an industrial environment with a reliability exceeding 95%.

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 2012
Accession Number
ADA576953

Entities

People

  • A. Shekhter
  • B. R. Crawford
  • C. Loader

Organizations

  • Defence Science and Technology Group

Tags

Communities of Interest

  • Air Platforms
  • Space

DTIC Thesaurus Topics

  • Accuracy
  • Acquisition
  • Aircraft Equipment
  • Aircrafts
  • Airframes
  • Aluminum Alloys
  • Composite Materials
  • Corrosion Resistance
  • Engineering
  • Heat Treatment
  • Materials
  • Materials Engineering
  • Materials Processing
  • Materials Science
  • Reliability
  • Standards
  • Structural Properties

Readers

  • Materials Science and Engineering.
  • Software Engineering