The Variability of Fatigue in Notched Bars of IN100 (Preprint)

Abstract

IN100 is one of the workhorse nickel-base superalloys of the current fleet of turbine engines owned and operated by the US Air Force. Many of the life-limited locations on fracture critical IN100 components are associated with locations of stress concentrations, e.g. bolt holes, fillets, balance flange scallops, etc. The prior work by Jha, Caton, and others examining the fatigue variability of nickel-base superalloys found a link between the minimum fatigue life and fracture mechanics. This prior work only examined the fatigue behavior of smooth fatigue bars. The current effort determined that the link between minimum fatigue life and fracture mechanics is applicable even when only a small volume of the material at the root of a notch is subject to the high stress conditions.

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Document Details

Document Type
Technical Report
Publication Date
Aug 01, 2012
Accession Number
ADA566160

Entities

People

  • Andrew H. Rosenberger
  • D'anthony A. Ward
  • Dennis J. Buchanan
  • Sushant K. Jha

Organizations

  • Air Force Research Laboratory

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Air Force
  • Air Force Facilities
  • Air Force Research Laboratories
  • Chemical Compounds
  • Fatigue Life
  • Fracture (Mechanics)
  • Manufacturing
  • Materials
  • Mechanics
  • Military Research
  • Powder Metallurgy
  • Probabilistic Models
  • Residual Stress
  • Stress Concentration
  • Stress Intensity Factors
  • Stresses
  • Structural Components

Readers

  • Logistics and Supply Chain Management.
  • Materials Science (Mechanical Engineering).