52 research outputs found
Effect of grain and secondary phase morphologies in the mechanical and damping behavior of Al7075 alloys
The present study evaluates the role of the microstructure in the static and dynamic mechanical behavior of as-cast Al7075 alloy promoted by ultrasonic treatment (US) during solidification. The characterization of samples revealed that US treatment promoted grain and intermetallics refinement, changed the shape of the intermetallic phases (equilibrium phases of soluble M and/or T (Al, Cu, Mg, Zn) and their insoluble Al-Cu-Fe compounds) and lead to their uniform distribution along the grain boundaries. Consequently, the mechanical properties and damping capacity above critical strain values were enhanced by comparison with values obtained for castings produced without US vibration. This results suggest that the grain and secondary phases refinement by US can be a promising solution to process materials to obtain high damping and high strength characteristics.This research was supported by FEDER/COMPETE funds and by national funds through FCT - Portuguese Foundation for Science and Technology and was developed on the aim of the research Post-Doctoral grant SFRH/BPD/76680/2011. Also, this work has been supported by the FCT in the scope of the project: UID/EEA/04436/2013.info:eu-repo/semantics/publishedVersio
Complementary RNA amplification methods enhance microarray identification of transcripts expressed in the C. elegans nervous system
A unified configurational optimization framework for battery swapping and charging stations considering electric vehicle uncertainty
Efficient and stable symmetrical electrode La0.6Sr0.4Co0.2Fe0.7Mo0.1O3-delta for direct hydrocarbon solid oxide fuel cells
A soft-PWM approach to power/signal synchronous transmission for SRG-based DC microgrids
A new modulation-demodulation approach to DC power-line data transmission for SRG-integrated microgrid
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