Effects of Shot Peening Processing on the Fatigue Behavior of Three Aluminum Alloys and TI-AL-4V

Abstract

The fatigue strength of three shot-peened aluminum alloys (Al 7075-T651, Al 2024-T351 and Al 2014-T6) and a titanium alloy (Ti-6Al-4V) was measured to determine the differences in shot peening quality from three vendors that were given the same shot peening parameters. Shot peening produces surface roughness, a cold-worked layer and, most importantly, a residual stress layer that resists the propagation of fatigue cracks. Significant vendor-to-vendor differences in fatigue properties were found, with Vendor 1 giving the greatest fatigue lifetimes.

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Document Details

Document Type
Technical Report
Publication Date
Apr 05, 2001
Accession Number
ADP013491

Entities

People

  • James Campbell

Organizations

  • United States Army Research Laboratory

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Alloys
  • Aluminum
  • Aluminum Alloys
  • Crack Propagation
  • Fatigue Tests (Mechanics)
  • Metals
  • Microhardness
  • Reliability
  • Residual Stress
  • Roughness
  • Shot Peening
  • Stress Concentration
  • Stresses
  • Surface Roughness
  • Test Methods
  • Titanium
  • Titanium Alloys

Fields of Study

  • Materials science

Readers

  • Structural Health Monitoring of Composite Structures.
  • Systems Analysis and Design