Low Cycle Fatigue Investigation of Titanium 6A1-4V Alloy

Abstract

To evaluate the effect of forging and heat treatment parameters on titanium 6A1-4V alloy (AMS 4928), various microstructures were investigated and compared in a deflection-controlled low cycle fatigue test program. The test specimen was designed to simulate the strain state observed in gas turbine engine components. The results of this study will be used to optimize the design of compressor disks. Parameters investigated include environment, mean strain, and surface condition. The number of cycles to initiate a fatigue crack and the rate of crack propagation were measured to evaluate the microstructures. The number of cycles to crack initiation was correlated with a mechanistic theory based on the static properties of the materials investigated.

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Document Details

Document Type
Technical Report
Publication Date
Oct 17, 1968
Accession Number
ADA382377

Entities

People

  • B. N. Greene
  • D. H. Kellogg
  • H. J. Oberle
  • S. A. Sattar

Organizations

  • Pratt & Whitney

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Chemistry
  • Crack Propagation
  • Engine Components
  • Engineering
  • Engines
  • Fatigue Tests (Mechanics)
  • Gas Turbines
  • Materials
  • Materials Engineering
  • Mechanical Properties
  • Mechanical Working
  • Mechanics
  • Resistance
  • Sea Water
  • Tensile Properties
  • Tensile Strength
  • Turbines

Fields of Study

  • Materials science

Readers

  • Aerodynamics.
  • Metallurgy
  • Structural Health Monitoring of Composite Structures.