Deformation and Fracture of Advanced Anisotropic Superalloys.

Abstract

A study was conducted to determine the effects of crystallographic orientation and rhenium content on the creep behavior of a single crystal nickel-base superalloy. Creep tests conducted at 982 C and 220 MPa (32 ksi) on Alloy 444 single crystals show that there is an increase in creep strength as the specimen axis is varied from (001) to 26 C from (001). This orientation effect is favorable for use of nickel-base superalloy single crystal as turbine blade materials. Substitution of rhenium for tungsten in Alloy 444 increases creep strength. The mechanism for this effect is the subject of a continuing investigation.

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Document Details

Document Type
Technical Report
Publication Date
Nov 01, 1977
Accession Number
ADA145723

Entities

People

  • A. F. Giamei
  • D. N. Duhl
  • G. R. Leverant
  • M. L. Gell

Organizations

  • Pratt & Whitney

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Air Force
  • Anisotropy
  • Creep
  • Creep Strength
  • Creep Tests
  • Crystal Structure
  • Crystals
  • Failure Mode And Effect Analysis
  • Gas Turbines
  • Materials
  • Mechanical Properties
  • Microstructure
  • Orientation (Direction)
  • Single Crystals
  • Statistical Analysis
  • Turbine Blades
  • Turbines

Fields of Study

  • Materials science

Readers

  • Materials Science and Engineering.
  • Powder metallurgy of Titanium alloys.