The Variability of Fatigue Crack Growth Life of Aluminum Casting Alloy A357-T6

Abstract

This investigation considers the variability of fatigue crack growth (FCG) life of A357-T6. the life variability for this cast aluminum alloy is greater than the variability of 2024-T3, a wrought aluminum alloy. Dendrite arm spacing (DAS), dendrite cell size (DCS), porosity and silicon particle aspect ratios are measured to characterize the test specimens. Metallographic and fractographic analyses are performed to aid potential correlations between microstructure and discontinuities and fatigue behavior. Several recommendations are made for future efforts.

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Document Details

Document Type
Technical Report
Publication Date
Jul 01, 1986
Accession Number
ADA174279

Entities

People

  • J. D. Tirpak

Organizations

  • Wright Laboratory

Tags

Communities of Interest

  • Advanced Electronics
  • Space

DTIC Thesaurus Topics

  • Alloys
  • Aluminum Alloys
  • Aspect Ratio
  • Cell Size
  • Data Analysis
  • Engineering
  • Materials
  • Materials Engineering
  • Materials Laboratories
  • Materials Science
  • Mechanical Properties
  • Mechanics
  • Statistical Analysis
  • Statistics
  • Tensile Strength
  • Tensile Testing
  • Test And Evaluation

Fields of Study

  • Materials science

Readers

  • Molecular and genetic basis of cancer.
  • Powder metallurgy of Titanium alloys.
  • Structural Health Monitoring of Composite Structures.

Technology Areas

  • Space