Localized Hydrogen Analysis in Simulated Grain Boundaries of Aluminum Alloys Exposed to Stress Corrosion

Abstract

The role of hydrogen in the stress corrosion attack of 7000 series aluminum alloys was investigated using sputtered film/substrate samples to simulate the grain boundary constituents in these alloys. Localized hydrogen measurements were made in the film, interface region, and substrate using the Lithium Nuclear Microprobe for Hydrogen (LNMH) technique. Hydrogen concentrations were measured in samples of pure aluminum film/7075 substrate, 7475 film/7075 substrate, and MgZn2 film/7075 substrate for as-sputtered, corrosion exposed, and stress corrosion exposed conditions as well as after stress removal. A substantial hydrogen concentration increase was observed in the interface region of MgZn2 film/7075 substrate samples exposed to stress corrosion; smaller increases were introduced in the interface region of 7475 film/7075 substrate samples; no increase occurred in aluminum film/7075 substrate samples.

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Document Details

Document Type
Technical Report
Publication Date
Feb 01, 1978
Accession Number
ADA052723

Entities

People

  • Philip N. Adler

Organizations

  • Naval Air Systems Command

Tags

Communities of Interest

  • Energy and Power Technologies
  • Ground and Sea Platforms
  • Space
  • Weapons Technologies

DTIC Thesaurus Topics

  • Aircrafts
  • Alloys
  • Aluminum Alloys
  • Corrosion
  • Crystal Structure
  • Electron Microscopy
  • Environmental Exposure
  • Failure Mode And Effect Analysis
  • Geography
  • Grain Boundaries
  • Materials
  • Materials Engineering
  • Materials Science
  • Measurement
  • Metallurgy
  • Metals
  • Stress Corrosion

Fields of Study

  • Materials science

Readers

  • Materials Science (Mechanical Engineering).
  • Surface Engineering/Surface Coating Technology.
  • Thin Film Deposition Science.