Shock Wave Thermomechanical Processing of Aircraft Gas Turbine Disk Alloys.

Abstract

This program was conducted to assess the effects of shock wave thermomechanical processing on nickel-base (Ni) gas turbine disks. In particular, the peak pressure limit on shaped subscale turbine disks was determined based on allowable permanent deformation and fracture. Using maximum pressure and selected shock/heat-treat schedules, the effect on mechanical properties was determined with results indicating an enhancement of strength, particularly the yield strength, with only a slight decrease in ductility. In general, low-cycle fatigue (LCF) life was not significantly affected, however, two samples tested showed a 3X improvement in life. In addition, two shock/heat-treat schedules were found to be extremely beneficial and will be investigated further. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Aug 01, 1979
Accession Number
ADA082080

Entities

People

  • James W. Simon
  • John M. Robertson
  • Thomas D. Tillman

Organizations

  • Pratt & Whitney

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Electron Microscopy
  • Explosives
  • Failure Mode And Effect Analysis
  • Grain Size
  • Heat Treatment
  • Manufacturing
  • Materials
  • Mechanical Properties
  • Mechanical Working
  • Mechanics
  • Microscopy
  • Shock Waves
  • Standards
  • Tensile Properties
  • Tensile Strength
  • Tensile Testing
  • Turbines

Fields of Study

  • Materials science

Readers

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  • Powder metallurgy of Titanium alloys.
  • Structural Health Monitoring of Composite Structures.