GUIDING PRINCIPLES FOR LOWERING THE DUCTILE-TOBRITTLE TRANSITION TEMPERATURE IN THE BODYCENTERED-CUBIC METALS,

Abstract

Yielding, flow, and fracture of body-centeredcubic (b.c.c.) metals are briefly reviewed to ascertain the guiding principles for lowering the ductile-to-brittle transition temperature, T sub c. It is concluded that the major methods for lowering T sub c in polycrystals are: (1) ultra-high purification, (2) use of scavengers to remove interstitials, (3) prestraining, (4) decreasing the grain size, and (5) introducing a dispersion of hard second-phase particles. Experimental and theoretical support exists for each of these methods. The roles of twinning and alloying have not as yet been resolved. (Author)

Document Details

Document Type
Technical Report
Publication Date
Dec 10, 1963
Accession Number
AD0437596

Entities

People

  • Hans Conrad

Organizations

  • The Aerospace Corporation

Tags

DTIC Thesaurus Topics

  • Dispersions
  • Grain Size
  • Particles
  • Polycrystals
  • Transition Temperature
  • Transitions

Fields of Study

  • Physics

Readers

  • Materials Science (Mechanical Engineering).
  • Powder metallurgy of Titanium alloys.
  • Systems Analysis and Design