Issues »  Volume 11, Issue 3

Structural-Phase States of Titanium After an Electroexplosive Alloying and the Subsequent Electron-Beam Treatment

S. V. Karpiy$^{1}$, M. M. Morozov$^{1}$, E. A. Budovskikh$^{1}$, Yu. F. Ivanov$^{2}$, V. E. Gromov$^{1}$

$^1$Siberian State Industrial University, 42 Kirov Str., 654007 Novokuznetsk, Russia
$^2$Institute of High Current Electronics SB RAS, 2/3 Akademicheskiy Ave., 634055 Tomsk, Russia

Received: 15.03.2010. Download: PDF

The features of a surface relief, structure and phase composition of the hardened layers of commercially pure titanium after electroexplosive aluminizing and boroaluminizing with the subsequent electron-beam treatment are studied by methods of scanning and transmission electron-diffraction microscopies. The distribution of microhardness in depth is studied. As shown, the combined treatment leads to formation of a low roughness of a surface and is characterized by small quantity of microcracks. The total depth of a zone of influence at aluminizing and boroaluminizing is 60 and 90 $\mu$m, respectively. The microhardness of a surface increases in 2.3 and 5.5 times, accordingly. Along the depth of the combined-treatment zone, three layers naturally connected with each other are observed: the near-surface layer, which has a boundary determined by the depth of the electron-beam treatment; the intermediate layer with the changed phase composition caused by the electroexplosive alloying; the layer of a thermal influence, in which the hardening is reached due to the structure—phase changes of an alloy base. As revealed, the hardening under electroexplosive aluminizing and electron-beam treatment is reached due to formation of the multiphase structure containing nanoand microcrystalline particles of intermetallic compounds of the titanium—aluminium system; under boroaluminizing, the aluminium and titanium borides of various morphology are also revealed.

Keywords: electroexplosion alloying, electron-beam processing, structure, phase composition, microhardness.

PACS: 61.72.Ff, 62.20.Qp, 68.35.Ct, 68.37.-d, 81.15.Rs, 81.40.Wx, 81.65.Lp

DOI: https://doi.org/10.15407/ufm.11.03.273

Citation: S. V. Karpiy, M. M. Morozov, E. A. Budovskikh, Yu. F. Ivanov, and V. E. Gromov, Structural-Phase States of Titanium After an Electroexplosive Alloying and the Subsequent Electron-Beam Treatment, Usp. Fiz. Met., 11, No. 3: 273—293 (2010) (in Russian), doi: 10.15407/ufm.11.03.273

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Cited By (1)
  1. V. E. Gromov, K. V. Sosnin, Yu. F. Ivanov and O. A. Semina, Usp. Fiz. Met. 16, 175 (2015).

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