Residual Stress, Micro- and Macrotexture in Surface-Enhanced Titanium Alloys: Their Nondestructive Inspection and Effects on High-Cycle Fatigue Properties

Abstract

An acousto-elastic method was developed to estimate the residual stress and texture of a flat metal surface by simultaneous measurement of Rayleigh waves and surface skimming longitudinal waves (or P waves). The method showed promise in the successful recovery of surface residual stress in an AA 7076-T651 aluminum sample surface-treated by low plasticity burnishing. The effects of sandblasting and shot peening on a commercially pure titanium, a Ti-6Al-4V titanium alloy, and two Al-Cu aluminum alloys (AA 2026 and 2099) were investigated, and a theoretical analysis of the effects of micro-texture on the behavior of short fatigue crack growth was undertaken.

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Document Details

Document Type
Technical Report
Publication Date
May 01, 2006
Accession Number
ADA448675

Entities

People

  • Chi-sing Man
  • Tongguang Zhai

Organizations

  • University of Kentucky

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Aluminum Alloys
  • Elastic Properties
  • Geometry
  • Materials
  • Materials Science
  • Measurement
  • Mechanical Working
  • Metals
  • Plastic Properties
  • Rayleigh Waves
  • Residual Stress
  • Shot Peening
  • Surface Finishing
  • Surface Roughness
  • Tensile Strength
  • Turbines
  • Ultrasounds

Fields of Study

  • Materials science

Readers

  • Atmospheric Science / Meteorology, specifically Wind Wave Turbulence.
  • Materials Science and Engineering.
  • Powder metallurgy of Titanium alloys.