TWINNING AND THE LOW TEMPERATURE MECHANICAL PROPERTIES OF POLYCRYSTALLINE NIOBIUM, MOLYBDENUM AND NbMo ALLOYS.

Abstract

Mechanical tests in compression and tension over a range of temperatures embracing the ductile-brittle transition temperature have been done on irradiated and non-irradiated molybdenum and three alloys of niobium-molybdenum. Stress-relaxation tests in conjunction with these have been interpreted to show that gross slip and twinning are not involved in the initiation of fracture in those brittle materials. It is also deduced that irradiation damage and alloying act in a similar manner in inhibiting slip and twinning. It was concluded that the propagation energy is a predominant factor in twinning. (Author)

Document Details

Document Type
Technical Report
Publication Date
Jan 31, 1969
Accession Number
AD0681864

Entities

People

  • B. J. Shaw

Tags

DTIC Thesaurus Topics

  • Compression
  • Ductile Brittle Transition
  • Low Temperature
  • Materials
  • Mechanical Properties
  • Molybdenum
  • Physical Properties
  • Polycrystals
  • Transition Temperature
  • Transitions

Fields of Study

  • Physics

Readers

  • Materials Science and Engineering.
  • Nuclear and Radiation Engineering.