Melt Treatment by Pulsed Magnetic Fields Aimed at Controlling the Structure and Properties of Industrial Silumins
K. V. Nikitina, *, V. I. Nikitina, **, I. Yu. Timoshkina, ***,
V. A. Glushchenkovb, ****, and D. G. Chernikovb, *****Translated by N. Korovin
aSamara State Technical University, ul. Molodogvardeiskaya 244, Samara, 443100 Russia
bSamara State Aerospace University, Moskovskoe sh. 34, Samara, 443086 Russia
Correspondence to: *e-mail: kvn-6411@mail.ru
Correspondence to: **e-mail: tlp@smgtu.ru
Correspondence to: ***e-mail: ivan-mns@mail.ru
Correspondence to: ****e-mail: imp@ssau.ru
Correspondence to: *****e-mail: omd@ssau.ru
Received 4 December, 2014
Abstract—Computer modeling of main force factors when treating aluminum alloys by pulsed magnetic fields according to the radial and axial effect schemes is performed. It is established that, when using the radial scheme, the shock wave, which appears in the melt after a single pulse, affects its entire bulk for 40 μs; when using the axial scheme, this time is 416 μs. Experimental studies for industrial silumins AK6M2 and AK10M2N have confirmed the presence of a stable modifying effect under the magnetic pulsed treatment (MPT), notably, dendrite sizes of the α-Al phase and eutectic silicon crystals decrease, density and electrical conductivity increases, and alloy strength and plasticity in a cast state increase. Based on the experimental investigations, it is concluded that the MPT is most manufacturable for the axial effect scheme.
Keywords: physical methods of melt treatment, pulsed magnetic fields, aluminum melts, magnetic-pulsed treatment, silumins, computer modeling, shock wave, modification, microstructure, physicomechanical properties of alloys
DOI: 10.3103/S1067821216030111