Authors: Saurabh Puri Amit Acharya Anthony D Rollett
Publish Date: 2010/05/29
Volume: 42, Issue: 3, Pages: 669-675
Abstract
A framework for modeling controlled plastic flow through grain boundaries using a continuum plasticity theory phenomenological mesoscopic field dislocation mechanics PMFDM is presented in this article The developed tool is used to analyze the effect of different classes of constraints to plastic flow through grain boundaries as it relates to dislocation microstructure development and mechanical response of a bicrystal It is found that in the case of low misorientation angle between adjacent grains impenetrable grain boundaries cause significant work hardening as compared to penetrable grain boundaries due to the accumulation of excess dislocations along them However a penetrable grain boundary with a high misorientation angle effectively behaves as an impenetrable boundary with respect to the stressstrain responseFinancial support for SP from the National Science Foundation Grant No DMI0423304 and the DowdICES Fellowship is gratefully acknowledged Support for AA and ADR from the MRSEC at CMU NSF Grant No DMR0520425 is gratefully acknowledged Discussions with members of the MRSEC at CMU NSF Grant No DMR0520425 are gratefully acknowledged
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