Investigation of the Effects of Thermal Mechanical Variables on the Creep Properties of High Strength Columbium Alloys

Abstract

Studies of recrystallization, grain growth, and response to thermal-mechanical processing were carried out to characterize the material. The alloys were quite similar in their response to thermal treatment with the exception that Cb-1 showed aging response in the temperature range 1000 - 1200C. The aging behavior was attributed to the precipitation of a zirconium nitride or carbonitride. The 1315C (2400F) creep-rupture properties of the two alloys were quite similar when compared in equivalent structural conditions, with Cb-1 being slightly superior to 8-88. The ductile-brittle transition of 8-88 was approximately 50C lower thon that of Cb-1.

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Document Details

Document Type
Technical Report
Publication Date
Aug 01, 1969
Accession Number
AD0864287

Entities

People

  • J. A. Cornie
  • R. T. Begley

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Chemical Synthesis
  • Chemistry
  • Crystal Structure
  • Ductile Brittle Transition
  • Hardening
  • Hardness
  • High Temperature
  • Materials
  • Materials Laboratories
  • Mechanical Properties
  • Mechanical Working
  • Protective Coatings
  • Refractory Metals
  • Tensile Properties
  • Transition Temperature
  • Turbine Blades
  • Yield Strength

Fields of Study

  • Materials science

Readers

  • Materials Science and Engineering.
  • Reinforced Composite Materials