Effect of Microstructure on Fatigue Crack Growth of 7XXX Aluminum Alloys under Constant Amplitude and Spectrum Loading.

Abstract

An investigation was made to identify microstructural features which control the fatigue crack growth characteristics of 7XXX aluminum alloys. Constant amplitude and simple overload tests were conducted in humid air on controlled microstructural variations of alloys 7075 and 7050. Results indicated that relative influence of different microstructural features and ranking of the alloys based on fatigue crack propagation resistance depend on loading conditions.

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Document Details

Document Type
Technical Report
Publication Date
Apr 14, 1978
Accession Number
ADA057129

Entities

People

  • A. B. Thakker
  • J. T. Staley
  • R. J. Bucci
  • R. R. Sawtell
  • T. H. Sanders Jr.

Organizations

  • Alcoa

Tags

Communities of Interest

  • Air Platforms
  • Ground and Sea Platforms
  • Human Systems
  • Space
  • Weapons Technologies

DTIC Thesaurus Topics

  • Aircrafts
  • Airframes
  • Aluminum Alloys
  • Chemical Analysis
  • Chemical Engineering
  • Fatigue Tests (Mechanics)
  • Fracture (Mechanics)
  • Geometry
  • High Humidity
  • Materials
  • Materials Engineering
  • Materials Science
  • Materials Testing
  • Measurement
  • Mechanics
  • Military Research
  • Test And Evaluation

Fields of Study

  • Materials science

Readers

  • Structural Health Monitoring of Composite Structures.