Campus Units

Materials Science and Engineering, Ames Laboratory

Document Type

Article

Publication Version

Accepted Manuscript

Publication Date

2018

Journal or Book Title

Materials Letters

DOI

10.1016/j.matlet.2018.11.114

Abstract

It was recently reported that segregation of Zr to grain boundaries (GB) in nanocrystalline Cu can lead to the development of disorder in the intergranular structure [1,2]. In this study we employ atomistic computer simulations to investigate how this disorder affects dislocation nucleation from the GBs under applied stress. It was found that a fully disordered grain boundary structure suppresses dislocation emission and significantly increases the yield stress. Depending on the solute concentration and heat-treatment, however, partial disorder may also occur and this aids dislocation nucleation rather than suppressing it, reducing or eliminating the strengthening effect.

Comments

This is a manuscript of an article published as Borovikov, Valery, Mikhail I. Mendelev, and Alexander H. King. "Effects of Grain Boundary Disorder on Dislocation Emission." Materials Letters (2018). DOI: 10.1016/j.matlet.2018.11.114. Posted with permission.

Creative Commons License

Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License.

Copyright Owner

Elsevier B.V.

Language

en

File Format

application/pdf

Available for download on Friday, November 20, 2020

Published Version

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