EFFECTS OF SECOND-PHASE PARTICLES ON DUCTILITY.

Abstract

Several aspects of the effects of second-phase particles on ductility are discussed. In the case of crack initiation, particles can act to disperse the dislocation arrays which cause cracking, but also can initiate cracks which propagate into the matrix. It is suggested that there is a critical range of particle size and spacing at which the former beneficial effect predominates, and some experimental evidence to support this contention is cited. In the case of crack propagation, particles can act as dislocation sources. Calculations and experiments aimed at gaining insight into the effect of dislocation sources on yielding are described. Finally, auxiliary problems (such as effects of grain size and substructure on ductility, methods of producing dispersions, and properties of metals and interstitial compounds) are discussed. (Author)

Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1966
Accession Number
AD0480038

Entities

People

  • A. R. Rosenfield
  • G. T. Hahn

Organizations

  • Battelle Memorial Institute

Tags

DTIC Thesaurus Topics

  • Crack Propagation
  • Cracks
  • Dislocations
  • Dispersions
  • Ductility
  • Grain Size
  • Particle Size
  • Particles
  • Physical Properties

Readers

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

Technology Areas

  • Space