Campus Units

Materials Science and Engineering, Ames Laboratory

Document Type

Article

Publication Version

Submitted Manuscript

Publication Date

2018

Journal or Book Title

arXiv

Abstract

It was recently reported that segregation of Zr to grain boundaries (GB) in nanocrystalline Cu can lead to the formation of disordered intergranular films [1,2]. In this study we employ atomistic computer simulations to study how the formation of these films affects the dislocation nucleation from the GBs. We found that full disorder of the grain boundary structure leads to the suppression of dislocation emission and significant increase of the yield stress. Depending on the solute concentration and heat-treatment, however, a partial disorder may also occur and this aids dislocation nucleation rather than suppressing it, resulting in elimination of the strengthening effect.

Comments

Borovikov, Valery, Mikhail I. Mendelev, and Alexander H. King. "Effects of Grain Boundary Disorder on Yield Strength." arXiv preprint arXiv:1802.08199 (2018). Posted with permission.

Copyright Owner

The Authors

Language

en

File Format

application/pdf

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