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PHILOSOPHICAL MAGAZINE, 2003, VOL. 83, NO. 11, 13291346 Nucleation of kink pairs on partial dislocations: a new
 

Summary: PHILOSOPHICAL MAGAZINE, 2003, VOL. 83, NO. 11, 13291346
Nucleation of kink pairs on partial dislocations: a new
model for solution hardening and softening
T. E. Mitchelly, P. M. Andersony}, M. I. Baskesy, S. P. Chenz,
R. G. Hoaglandy and A. Misray
y Materials Science and Technology Division, Los Alamos National Laboratory,
Los Alamos, New Mexico 87545, USA
z Theoretical Division, Los Alamos National Laboratory, Los Alamos,
New Mexico 87545, USA
} Department of Materials Science and Engineering, Ohio State University,
Columbus, Ohio 43210, USA
[Received 29 April 2002 and accepted in revised form 4 November 2002]
Abstract
Nucleation and motion of kink pairs on partial dislocations are examined by
elasticity theory for materials with a high Peierls stress. Two approaches are used:
one considers the change in average stacking-fault energy (SFE) due to alloying
elements and the other considers the change in local SFE due to a nearby solute
atom. Both approaches highlight the role of SFE on kink nucleation, propagation
and annihilation and both furnish strain rate as a function of stress, temperature
and SFE. Model predictions are compared with yield stress data for two systems:

  

Source: Anderson, Peter M. - Department of Materials Science and Engineering, Ohio State University

 

Collections: Materials Science