Crack Growth of a Titanium-Aluminide Alloy under Thermal-Mechanical Fatigue

Abstract

New materials must be developed in order to increase the operating temperature of Air Force gas turbines. One of the materials under consideration is a titanium-aluminide alloy, Ti3Al1. Before this material can be used, its behavior under combined thermal-mechanical fatigue (TMF) conditions must be understood. To understand this behavior, three 315-649 C TMF test and one 649 C isothermal fatigue test with load hold time were conducted. Crack growth data from these tests were compared with each other as well as with crack growth data from four previous TMF and isothermal fatigue tests of the same material. Keywords: Metal fatigue; Crack propagation; Fracture mechanics; Physical metallurgy.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1988
Accession Number
ADA202767

Entities

People

  • David G. Burgess

Organizations

  • Air Force Institute of Technology

Tags

Communities of Interest

  • Advanced Electronics
  • Air Platforms
  • C4I

DTIC Thesaurus Topics

  • Air Force
  • Alloys
  • Chemistry
  • Crack Propagation
  • Crack Tips
  • Fatigue Tests (Mechanics)
  • Ferrium
  • Fracture (Mechanics)
  • Gas Turbines
  • Materials
  • Materials Laboratories
  • Mechanics
  • Physical Metallurgy
  • Titanium
  • Titanium Aluminide
  • Turbines
  • Voltage

Readers

  • Materials Science (Mechanical Engineering).
  • Powder metallurgy of Titanium alloys.