Thermal Mechanical Fatigue of Coated Blade Materials

Abstract

A model capable of predicting thermal mechanical fatigue (TMF) crack initiation and propagation in coated advanced blade materials, with emphasis on crack initiation, was developed and demonstrated. The experimental program included isothermal baseline and TMF tests on one alloy and two coating materials to evaluate the effects of mean stress, frequency, hold periods, and maximum temperature on the TMF life of a coated system. Task I, Definition of TMF Conditions, was completed using the results of a separately funded program evaluating current and advanced airfoil conditions. Task II, Alloy/Coating Selection and Isothermal Properties, generated monotonic data for uncoated PWA 1480, freestanding PWA 276 overlay coating, and PWA 275 aluminide coating.

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1989
Accession Number
ADA214258

Entities

People

  • B. A. Cowles
  • J. E. Heine
  • J. R. Warren

Organizations

  • Pratt & Whitney

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Crack Propagation
  • Creep
  • Failure Mode And Effect Analysis
  • High Temperature
  • Laboratory Tests
  • Materials
  • Materials Laboratories
  • Materials Testing
  • Mechanical Properties
  • Mechanics
  • Modulus Of Elasticity
  • Stress Strain Relations
  • Stresses
  • Surface Properties
  • Tensile Stress
  • Test And Evaluation
  • Test Methods

Fields of Study

  • Materials science

Readers

  • Software Engineering
  • Structural Health Monitoring of Composite Structures.