English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

In this paper, we study the effects of $\theta ^\prime$-Al$_2$Cu plate-likeprecipitates on the plasticity of Al-Cu micro-pillars, with a sample sizeallowing the precipitates to cross the entire micro-pillar. {100}-slip tracesare identified for the first time in Al and Al alloys at room temperature. Weinvestigate the underlying mechanisms of this unusual {100}-slip, and show thatit operates along the coherent $\theta ^\prime$-Al$_2$Cuprecipitate/$\alpha$-Al matrix interface. A combination of molecular dynamicssimulations and stress analysis indicates that screw dislocations cancross-slip from the {111} plane onto the {100} $\theta^\prime$-Al$_2$Cu/$\alpha$-Al interface, then move on it through a kink-pairmechanism, providing a reasonable explanation to the observed {100}-slips. Theroles of the $\theta ^\prime$-Al$_2$Cu/$\alpha$-Al matrix interface on theproperties of interfacial dislocations are studied within the Peierls-Nabarroframework, showing that the interface can stabilize the {100} screwdislocations from the spreading of the core, and increases the Peierls stress.These results improve our understanding of the mechanical behavior of Al-Cumicro-pillars at room temperature, and imply an enhanced role of interfacialslip in Al-Cu based alloys at elevated temperature in consideration of theunderlying kink-pair mechanism.

Plate-like precipitate effects on plasticity of Al-Cu micro-pillar: {100}-interfacial slip