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 Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

A giant Zn segregation transition is revealed using CALPHAD-integrateddensity-based modelling of segregation into Fe grain boundaries (GBs). Theresults show that above a threshold of only a few atomic percent Zn in thealloy, a substantial amount of up to 60 at.\% Zn can segregate to the GB. Wefound that the amount of segregation abruptly increases with decreasingtemperature, while the Zn content in the alloy required for triggering thesegregation transition decreases. Direct evidence of the Zn segregationtransition is obtained using high-resolution scanning transmission electronmicroscopy. Base on the model, we trace the origin of the segregationtransition back to the low cohesive energy of Zn and a miscibility gap in Fe-ZnGB, arising from the magnetic ordering effect, which is confirmed by ab-initiocalculations. We also show that the massive Zn segregation resulting from thesegregation transition greatly assists with liquid wetting and reduces the workof separation along the GB. The current predictions suggest that control overZn segregation, by both alloy design and optimizing the galvanization andwelding processes, may offer preventive strategies against liquid metalembrittlement.

Giant segregation transition as origin of liquid metal embrittlement in the Fe-Zn system