Jump to ContentJump to Main Navigation
Strengthening Mechanisms in Crystal Plasticity$
Users without a subscription are not able to see the full content.

Ali Argon

Print publication date: 2007

Print ISBN-13: 9780198516002

Published to Oxford Scholarship Online: September 2007

DOI: 10.1093/acprof:oso/9780198516002.001.0001

Show Summary Details
Page of

PRINTED FROM OXFORD SCHOLARSHIP ONLINE (www.oxfordscholarship.com). (c) Copyright Oxford University Press, 2019. All Rights Reserved. Under the terms of the licence agreement, an individual user may print out a PDF of a single chapter of a monograph in OSO for personal use (for details see www.oxfordscholarship.com/page/privacy-policy).date: 15 June 2019



Strengthening Mechanisms in Crystal Plasticity

A. S. Argon

Oxford University Press

One of the most fundamental resistances to dislocation motion is that which the discrete lattice offers in a pure crystalline material in a temperature range where diffusion plays no role. This resistance will be considered from two mechanistically different points of view. First, the Peierls-Nabarro (PN) resistance is considered that results from the pulsing distortions of the dislocation core as it moves through the discrete lattice, affecting often the edge and screw dislocations differently and at very different levels in different crystal structures. Various models of this resistance affecting screw dislocations are examined in detail, leading to consideration of its temperature and strain rate dependence in many BCC metals, and to a lesser extent, in undoped diamond-cubic Si. Second, a form of ubiquitous resistance referred to as phonon drag, that arises from the interaction of moving dislocations with lattice thermal vibrations is presented. It is noted that the temperature dependence of phonon drag is radically different from that of the lattice resistance.

Keywords:   Peierls-Nabarro (P-N) dislocation, core misfit energy, P-N model, FCC metals, HCP metals, Schmidt law, BCC metals, non-Schmidt behavior, Kinks in screw dislocations, phonon drag

Oxford Scholarship Online requires a subscription or purchase to access the full text of books within the service. Public users can however freely search the site and view the abstracts and keywords for each book and chapter.

Please, subscribe or login to access full text content.

If you think you should have access to this title, please contact your librarian.

To troubleshoot, please check our FAQs , and if you can't find the answer there, please contact us .