Heat Transfer Modeling and Analytical Quenching of a Powder Metallurgy Turbine Disk during Heat Treatment.

Abstract

A conduction heat transfer analysis was used to model experimental internal metal temperatures measured by thermocouples imbedded in superalloy turbine task disk 'blanks' of varying thickness while they were quenched during heat treatment in several media, including oil, salt, and air. The computer model deduced effective values of the average surface heat transfer coefficient as the superalloy part cooled from the solution temperature during heat treatment. The resulting heat transfer coefficients were applied to actual Hot Isostatically Pressed (As-HIP) turbine disk shapes (target sonic) by a modified computer analysis to determine local cooling rates and cooling rate variations within the quenched disks. An assessment was made of the expected variation in tensile properties that would be created in the disk due to heat transfer and geometrical shape tests. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1978
Accession Number
ADA054022

Entities

People

  • Jan M. Lane

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Computer Programs
  • Computers
  • Experimental Data
  • Heat Transfer
  • Heat Transfer Coefficients
  • Heat Transmission
  • Heat Treatment
  • Materials
  • Mechanical Properties
  • Mechanical Working
  • Powder Metallurgy
  • Tensile Properties
  • Tensile Strength
  • Thermal Conductivity
  • Thermal Resistance
  • Turbine Components
  • Turbines

Readers

  • Aerodynamics.
  • Powder metallurgy of Titanium alloys.
  • Thermal Physics or Thermal Science.