Effect of Specimen Thickness on the Creep Response of a Single Crystal Superalloy (Preprint)

Abstract

Creep tests on single crystal superalloy sheet specimens have shown a thickness dependent creep behavior. This is termed the thickness debit effect. To investigate the mechanism of thickness debit effect, isothermal, constant nominal stress creep tests at two test conditions 760 deg C/758MPa and 982 deg C/248MPa were performed on the uncoated sheet specimens of thicknesses 3.18mm and 0.51mm of PWA1484 Ni-base single crystal superalloy. It was observed that the dependence on specimen thickness under the two test conditions are different. At 760 deg C/758MPa reduction in creep strain to rupture with decreasing section.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 2012
Accession Number
ADA555444

Entities

People

  • A. Needleman
  • A. Staroselsky
  • Ashok Srivastava
  • R. Banerjee
  • S. Gopagoni
  • V. Seetharaman

Organizations

  • University of North Texas

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Air Force
  • Air Force Research Laboratories
  • Chemical Analysis
  • Creep
  • Creep Tests
  • Crystals
  • Diffraction
  • Electron Microscopes
  • Electron Microscopy
  • Failure Mode And Effect Analysis
  • Heat Treatment
  • High Temperature
  • Low Temperature
  • Materials
  • Materials Science
  • Single Crystals
  • Thickness

Fields of Study

  • Materials science

Readers

  • Mechanical Engineering/Mechanics of Materials.
  • Structural Health Monitoring of Composite Structures.
  • Thin Film Deposition Science.