The Mechanism Research of Electric Current Pulse and Electromagnetic for Grain Refinement of 6181 Aluminum Alloys During Two-roll Casting

Abstract

6181 aluminum alloys sheets were produced by two-roll casting with electric current pulse and magnetic fields, and the microstructures were observed. The experimental results show that application of composite fields (ECP and EM field) during TRC process refines the microstructures of sheets more evenly and effectively by comparison with individual application of ECP or EM field. For visually explaining the phenomenon, the distribution and amplitude of the magnetic induction intensity B and electromagnetic force F were obtained by numerically simulated. In addition, an obvious improvement of tensile strength by physical fields was measured. But the maximum elongation was from action of magnetic field and reached 10.9%.

Major Nuclear Accidents - A Review

“…In Mayak nuclear accident which is in Russia is the maximum points of the planet with radioactive pollution they have occurred numerous radioactive leaks which caused troubled of the most polluted parts of the world Cautious spill of radioactive materials in the river Tech [77][78][79][80][81][82][83][84][85][86][87][88][89][90][91][92] . Windstorm that scattered radioactive materials coming from sediments of Lake Karachay in 1967, Ozersk people were not well-versed, so they constant to use water for domestic use which caused serious health problems [93][94][95][96][97][98][99][100][101][102][103][104][105][106][107][108][109][110] .…”