High-Cycle Fatigue and Time-Dependent Failure in Metallic Alloys for Propulsion Systems

Abstract

The objective of the AFOSR-Multidisciplinary Research Initiative on High-Cycle Fatigue has been to characterize and performed physically-based modeling of the limiting damage states at the onset of high-cycle fatigue failure in blade and disk components in gas-turbine aircraft engines. The intent has been to facilitate mechanistic understanding as a basis for improved life prediction of such engine components. Efforts were focused on defining: (1) the fatigue thresholds for high-cycle fatigue, specifically involving small crack and mixed-mode effects, and (2) the influence of foreign object damage (FOD) on such thresholds and on the subsequent life, and the role of fretting and fretting fatigue, in a Ti-6Al-4V blade alloy and a polycrystalline Ni-base disk alloy.

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Document Details

Document Type
Technical Report
Publication Date
May 01, 2002
Accession Number
ADA405144

Entities

People

  • J. W. Hutchinson
  • Robert O. Ritchie
  • S. Suresh
  • W. W. Milligan

Organizations

  • University of California, Berkeley

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies
  • Ground and Sea Platforms
  • Weapons Technologies

DTIC Thesaurus Topics

  • Ceramic Materials
  • Chemical Synthesis
  • Chemistry
  • Computational Science
  • Crystal Structure
  • Materials
  • Materials Engineering
  • Materials Processing
  • Materials Science
  • Materials Testing
  • Measurement
  • Mechanical Engineering
  • Mechanical Properties
  • Mechanical Working
  • Mechanics
  • Physics Laboratories
  • Stress Strain Relations

Fields of Study

  • Physics

Readers

  • Database Systems and Applications
  • Powder metallurgy of Titanium alloys.
  • Tribology (the study of the boundary interaction between sliding surfaces, lubrication, wear and friction).