Theory of the unpinning and pinning mechanisms in L12 compounds in the anomalous regime

M. Knantha, J. Cserti, V. Vitek

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

A model of PPV type for the anomalous increase of the yield stress with temperature in L12 compounds is presented. It is based on two thermally activated processes that describe respectively, the pinning and the unpinning of [̄101] screw dislocations moving in the (111) plane. The unpinning mechanism invokes the concept of the major breakaway of the dislocation. A steady state involving a balance of the pinning and unpinning rates is formulated. The model explains many of the macroscopic features associated with the yield stress anomaly in the entire temperature regime.

Original languageEnglish
Title of host publicationProc First Int Symp Struct Intermet
EditorsR. Darolia, J.J. Lewandowski, C.T. Liu, P.L. Martin, D.B. Miracle, al et al
PublisherPubl by Minerals, Metals & Materials Soc (TMS)
Pages399-408
Number of pages10
ISBN (Print)0873392531
Publication statusPublished - Dec 1 1993
EventProceedings of the First International Symposium on Structural Intermetallics - Champion, PA, USA
Duration: Sep 26 1993Sep 30 1993

Publication series

NameProc First Int Symp Struct Intermet

Other

OtherProceedings of the First International Symposium on Structural Intermetallics
CityChampion, PA, USA
Period9/26/939/30/93

ASJC Scopus subject areas

  • Engineering(all)

Fingerprint Dive into the research topics of 'Theory of the unpinning and pinning mechanisms in L1<sub>2</sub> compounds in the anomalous regime'. Together they form a unique fingerprint.

  • Cite this

    Knantha, M., Cserti, J., & Vitek, V. (1993). Theory of the unpinning and pinning mechanisms in L12 compounds in the anomalous regime. In R. Darolia, J. J. Lewandowski, C. T. Liu, P. L. Martin, D. B. Miracle, & A. et al (Eds.), Proc First Int Symp Struct Intermet (pp. 399-408). (Proc First Int Symp Struct Intermet). Publ by Minerals, Metals & Materials Soc (TMS).