Additional grain boundary strengthening in length-scale architectured copper with ultrafine and coarse domains

Beitrag in einer Fachzeitschrift


Details zur Publikation

Autorinnen und Autoren: Hou X, Krauß S, Merle B
Zeitschrift: Scripta Materialia
Jahr der Veröffentlichung: 2019
Band: 165
Seitenbereich: 55-59
ISSN: 1359-6462


Abstract

The strength of polycrystals is known to increase with decreasing grain size, known as Hall-Petch effect. However, this relationship fails to predict the strength of samples with a non-uniform distribution of grain sizes. In this study, we purposely designed and fabricated copper micropillars with a strongly bimodal microstructure: half volume consisted of a large number of ultrafine grains, while the other half was predominantly single-crystalline. Micropillar compression evidenced that bimodal samples are 35% stronger than their counterparts containing only ultrafine grains. This paradoxical finding highlights the greater strengthening potential of microstructure distribution engineering, compared to the traditional grain refinement strategy. (C) 2019 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.


FAU-Autorinnen und Autoren / FAU-Herausgeberinnen und Herausgeber

Krauß, Sebastian
Lehrstuhl für Werkstoffwissenschaften (Allgemeine Werkstoffeigenschaften)
Merle, Benoit PD Dr. habil.
Lehrstuhl für Werkstoffwissenschaften (Allgemeine Werkstoffeigenschaften)


Zusätzliche Organisationseinheit(en)
Interdisziplinäres Zentrum, Center for Nanoanalysis and Electron Microscopy (CENEM)


Einrichtungen weiterer Autorinnen und Autoren

Coventry University


Zitierweisen

APA:
Hou, X., Krauß, S., & Merle, B. (2019). Additional grain boundary strengthening in length-scale architectured copper with ultrafine and coarse domains. Scripta Materialia, 165, 55-59. https://dx.doi.org/10.1016/j.scriptamat.2019.02.019

MLA:
Hou, Xiaodong, Sebastian Krauß, and Benoit Merle. "Additional grain boundary strengthening in length-scale architectured copper with ultrafine and coarse domains." Scripta Materialia 165 (2019): 55-59.

BibTeX: 

Zuletzt aktualisiert 2019-28-05 um 13:23