科研之友
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摘要
A new manufacturing process of high-strength electroconductive aluminum alloys and plane samples which is based on the immersion casting method with the action of weak current pulses (WCPs) and pulsed magnetic fields (PMFs) with the subsequent multicycle rolling is proposed. The objects of the investigation were alloys containing 97.7-98.3% Al and alloying additives (Cu, Mg, Mn, Si, Fe, Zn, Sc, and Zr). The considered technology enabled us to fabricate the samples 0.20-0.25 mm thick with a nanodimensional structure (d < 100 nm). It is established that the PMF and WCP effects differently affect the physical characteristics of the alloy. The WCP treatment enables one to attain higher strength (up to 430 MPa) and conductance (up to 55% IACS) than the PMF effect, but is the alloy plasticity is lower. As the aluminum content in the alloy decreases by 0.5%, its conductance lowers by 6-14% and its largest drop (up to 14%) is observed for the WCP-treated samples, while the smallest one (up to 6%) is observed for the PMF-treated samples.
- 出版日期2015-1
