DEPENDENCE OF MICROHARDNESS ON THE CONTENT OF ALLOYING ELEMENTS IN THE MODIFIED LAYER OF AL – 11SI – 2CU ALLOY SUBJECT TO ELECTRON-PLASMA ALLOYING
Abstract
The microhardness, elemental and phase composition of the Al – 11Si – 2Cu alloy subjected to electron-plasma alloying, which consisted of an electric explosion of a titanium conductor with a powder charge of Y2O3 and subsequent high-speed heating using an intense pulsed electron beam, were studied. A significant increase in the microhardness of the surface layers of the alloy was found. The penetration depth of the alloying elements, characterizing the thickness of the modified layer, was approximately 170 μm. The material layer (5 μm), most closely adjacent to the modification surface, is characterized by the maximum (155 ± 15.5 HV) microhardness. An intensive decrease in microhardness begins at a distance of 110 μm from the surface and at a distance of 170 μm the microhardness reaches the initial values of 85.9 ± 8 HV. A comparative analysis of changes in microhardness with the concentration of alloying elements in the surface layer of the alloy shows that the increase in microhardness is clearly associated with the presence of titanium and yttrium in the modified layer.
About the Authors
K.A. Butakova
Siberian State Industrial University
Russian Federation
Russian Federation
K.A. Osintsev
Samara National Research University named after Academician S.P. Korolev
D.V. Zagulyaev
Siberian State Industrial University
S.V. Konovalov
Samara National Research University named after Academician S.P. Korolev
V.E. Gromov
Siberian State Industrial University
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Review
For citations:
Butakova K., Osintsev K., Zagulyaev D., Konovalov S., Gromov V. DEPENDENCE OF MICROHARDNESS ON THE CONTENT OF ALLOYING ELEMENTS IN THE MODIFIED LAYER OF AL – 11SI – 2CU ALLOY SUBJECT TO ELECTRON-PLASMA ALLOYING. Bulletin of the Siberian State Industrial University. 2020;(1):44-48. (In Russ.)
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