Stress Corrosion Cracking of Wrought and P/M High Strength Aluminum Alloys.

Abstract

The combined results of the first three years of the program are presented, with emphasis on the stress corrosion cracking and hydrogen embrittlement of the PM 7090 Al alloy. Additional results on 7075 are also given. In particular, the role of temper and loading mode in susceptibility were examined for three test methods---time to failure of notched round bar specimens in a brine solution; straining electrode tests on notched round specimens under cathodic charging; and tensile tests on hydrogen pre-charged notched round specimens. These tests form the basis for an extensive, completed Ph.D. thesis which is summarized here. Stress corrosion testing has also been conducted on 7075 in aluminum chloride solutions and on HP 7075. We remain confident that we have established the basis and a good portion of the results necessary to understand, predict and model the role of hydrogen in stress corrosion cracking of high-strength aluminum alloys.

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1984
Accession Number
ADA144279

Entities

People

  • A. W. Thompson
  • I. M. Bernstein

Organizations

  • Carnegie Mellon University

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Aluminum Alloys
  • Chemical Compounds
  • Chemistry
  • Chlorides
  • Embrittlement
  • Environment
  • Geometry
  • Hydrogen Embrittlement
  • Materials
  • Materials Science
  • Materials Testing
  • Mechanical Properties
  • Metallurgy
  • Powder Metallurgy
  • Stress Corrosion
  • Stress Corrosion Cracking
  • Test Methods

Fields of Study

  • Materials science

Readers

  • Materials Science and Engineering.
  • Metallurgy
  • Structural Health Monitoring of Composite Structures.