A Study of the Fatigue Behavior of Small Cracks in Nickel-Base Superalloys

Abstract

The fatigue of behavior of short cracks was investigate in five wrought nickel-base superalloys currently used for aircraft turbine disks. Cracks were initiated at artificial defects and at persistent slip bands. Test frequencies ranged from 20Hz to 10cpm. Fatigue crack growth rates were measured over crack lengths ranging from 10 um to 1mm. Most of the testing was performed in load control with stress ranges approaching the cyclic yield strengths of alloys. Strain controlled tests were performed on IN100 under elastic-plastic cycling conditions. Keywords: Crack propagation; Physical metallurgy.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Feb 24, 1988
Accession Number
ADA195489

Entities

People

  • Glenn Romanoski
  • Jun Feng
  • Regis M. Pelloux

Organizations

  • Massachusetts Institute of Technology

Tags

Communities of Interest

  • Advanced Electronics
  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Chemistry
  • Crystal Structure
  • Gas Turbines
  • Geometry
  • Grain Boundaries
  • Grain Size
  • Materials
  • Materials Science
  • Measurement
  • Mechanical Properties
  • Mechanical Working
  • Mechanics
  • Metallurgy
  • Powder Metallurgy
  • Solid Solutions
  • Stress Intensity Factors
  • Turbines

Fields of Study

  • Materials science

Readers

  • Materials Science (Mechanical Engineering).
  • Mathematics or Statistics