Shot-Peening Sensitivity of Aluminum With Corrosion-Preventive Coatings

Abstract

The U.S. Army Aviation and Missile Research, Development, and Engineering Center Aviation Engineering Division (Huntsville, AL) requested that the U.S. Army Research Laboratory Weapons and Materials Research Directorate (Aberdeen Proving Ground, MD) execute a program aimed at evaluating the shot-peening sensitivity of 7075-T73 aluminum with U.S. Army corrosion-preventive coatings for aluminum. The coatings represent the two most common coatings for aviation aluminum alloys. The study was a follow-up to previous work that investigated shot-peening sensitivity on the base material. During that study, it was discovered that the aluminum alloy showed decreased fatigue strength when shot-peened at high Almen intensities. The present study focuses on the shot-peening interaction with the coatings. Both studies develop data to correlate surface roughness, x-ray diffraction residual stress analysis, and fatigue strength at a prescribed stress intensity, Kt = 1.75.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Nov 01, 2007
Accession Number
ADA474461

Entities

People

  • Daniel Snoha
  • Scott M. Grendahl

Organizations

  • United States Army Research Laboratory

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies
  • Weapons Technologies

DTIC Thesaurus Topics

  • Alloys
  • Aluminum
  • Aluminum Alloys
  • Engineering
  • Materials
  • Mechanical Properties
  • Mechanical Working
  • Military Research
  • Residual Stress
  • Roughness
  • Shot Peening
  • Stress Analysis
  • Stresses
  • Surface Properties
  • Surface Roughness
  • Tensile Strength
  • X Rays

Readers

  • Structural Health Monitoring of Composite Structures.
  • Surface Engineering/Surface Coating Technology.
  • Technical Research and Report Writing.