Journal
MATERIALS SCIENCE AND TECHNOLOGY
Volume 35, Issue 9, Pages 1028-1037Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/02670836.2019.1578918
Keywords
Solidification; microstructure; solid; liquid interface; precipitates-interaction capture
Funding
- Specialized Research Fund for the Doctoral Program of Higher Education of China [20100006110026]
- China Scholarship Council (CSC) [201606460086]
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Nano-sized iron-rich precipitates reinforced copper alloys achieve excellent mechanical properties. Capture mechanism of iron-rich precipitates into copper grains during solidification was described but needs further validation. Here, Cu-1.5Fe-0.5Co (wt-%) alloy is fabricated by gravity casting. Iron-rich precipitates in nano and submicron scale (mostly < 100 nm) are well dispersed in copper grain interior. Traditional pushing/engulfment transition (PET) models are used to interpret the capture process of iron-rich precipitates during copper solidification, but all fail to match the experimental results. The precipitates-interaction capture mechanism is most reasonable for describing the capture process.
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