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In the present study, Al–Cu alloy with fine grain of ~400nm has been prepared by mechanical alloying and spark plasma sintering (MA–SPS). Then bulk hierarchical nanoporous copper (BHNPC) was obtained by chemical dealloying of the resultant alloys. Results show that BHNPC possess a highly porosity of ~80% and fine ligament size of about 27nm that can be prepared without either applied potential or...
The elevated-temperature plasticity and flow behavior of an Er-modified, heat-resistant ZA73 alloy was evaluated by thermal simulation. The results showed that the addition of Er to ZA73 alloy notably improves the deformability and higher strain rate and temperature favors hot deformation. Bars with sound surface quality were successfully extruded at 350°C and a strain rate of ~0.1s −1 . Furthermore,...
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