THE MECHANICAL PROPERTIES OF TANTALUM WITH SPECIAL REFERENCE TO THE DUCTILE-BRITTLE TRANSITION

Abstract

The tensile behavior of dilute Ta-H and Ta-Mo alloys was studied as a function of alloying addition, grain size and test temperature at a constant strain rate. The results are interpreted in terms of the parameters sigma sub-i and k sub-y of the Petch equation. For Ta-H alloys at 25 C sigma sub-i was independent of hydrogen content whereas k sub-y increased with hydrogen content. Deformation twinning was not observed in Ta-H alloys either at 25 C or at -196 C. Dilute additions of Mo to Ta at 25 C resulted in an increase in k sub-y whereas sigma sub-i was unaffected. Twinning was observed at -196 C but not at 25 C. A large increase in ductility accompanied twinning.

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Document Details

Document Type
Technical Report
Publication Date
May 01, 1963
Accession Number
AD0424683

Entities

People

  • G. Abowitz
  • R. A. Burn

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Air Force
  • Chemical Analysis
  • Corporations
  • Crystal Structure
  • Crystals
  • Ductile Brittle Transition
  • Grain Boundaries
  • Materials
  • Materials Laboratories
  • Mechanical Properties
  • Molybdenum Alloys
  • Phase
  • Tantalum Alloys
  • Tensile Properties
  • Tensile Stress
  • Transition Temperature
  • Yield Strength

Readers

  • Materials Science and Engineering.