THEORY OF THE TEMPERATURE-DEPENDENT PLASTIC FLOW IN L1//2 ALLOYS WITH UNSTABLE APBs ON left brace 111 right brace PLANES.

G. Tichy, V. Vitek, D. P. Pope

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

A model is developed for the thermally activated motion of 1/2 LT AN BR 110 RT AN BR superpartial dislocations on (010) planes and 1/3 LT AN BR 112 RT AN BR superpartials on left brace 111 right brace planes, when antiphase boundaries on (111) planes are unstable. These two superpartials are sessile because they have non-planar cores. The model successfully replicates the behaviour observed in single-crystal Pt//3Al: the temperature dependence of the yield stress, (111) slip occurring for compression axes located on the (001) side of the unit triangle, and (001) slip occurring on the other side. The model also predicts that the location of the boundary between these two areas in the unit triangle should be temperature-dependent.

Original languageEnglish
Pages (from-to)485-494
Number of pages10
JournalPhilosophical Magazine A: Physics of Condensed Matter, Structure, Defects and Mechanical Properties
Volume53
Issue number4 pt 1
Publication statusPublished - Apr 1986

Fingerprint

antiphase boundaries
plastic flow
Plastic flow
triangles
slip
Temperature
temperature
Yield stress
Single crystals
temperature dependence
single crystals

ASJC Scopus subject areas

  • Materials Science(all)
  • Electronic, Optical and Magnetic Materials
  • Metals and Alloys
  • Physics and Astronomy (miscellaneous)
  • Condensed Matter Physics

Cite this

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abstract = "A model is developed for the thermally activated motion of 1/2 LT AN BR 110 RT AN BR superpartial dislocations on (010) planes and 1/3 LT AN BR 112 RT AN BR superpartials on left brace 111 right brace planes, when antiphase boundaries on (111) planes are unstable. These two superpartials are sessile because they have non-planar cores. The model successfully replicates the behaviour observed in single-crystal Pt//3Al: the temperature dependence of the yield stress, (111) slip occurring for compression axes located on the (001) side of the unit triangle, and (001) slip occurring on the other side. The model also predicts that the location of the boundary between these two areas in the unit triangle should be temperature-dependent.",
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AU - Pope, D. P.

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N2 - A model is developed for the thermally activated motion of 1/2 LT AN BR 110 RT AN BR superpartial dislocations on (010) planes and 1/3 LT AN BR 112 RT AN BR superpartials on left brace 111 right brace planes, when antiphase boundaries on (111) planes are unstable. These two superpartials are sessile because they have non-planar cores. The model successfully replicates the behaviour observed in single-crystal Pt//3Al: the temperature dependence of the yield stress, (111) slip occurring for compression axes located on the (001) side of the unit triangle, and (001) slip occurring on the other side. The model also predicts that the location of the boundary between these two areas in the unit triangle should be temperature-dependent.

AB - A model is developed for the thermally activated motion of 1/2 LT AN BR 110 RT AN BR superpartial dislocations on (010) planes and 1/3 LT AN BR 112 RT AN BR superpartials on left brace 111 right brace planes, when antiphase boundaries on (111) planes are unstable. These two superpartials are sessile because they have non-planar cores. The model successfully replicates the behaviour observed in single-crystal Pt//3Al: the temperature dependence of the yield stress, (111) slip occurring for compression axes located on the (001) side of the unit triangle, and (001) slip occurring on the other side. The model also predicts that the location of the boundary between these two areas in the unit triangle should be temperature-dependent.

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