Investigation of the influence of induction-heat treatment on the morphology of titanium plasma-sprayed coatings
Elena O. Osipova,1 Olga A. Markelova,1 Vladimir A. Koshuro, 1 Aleksandr A. Fomin,1
1 Yuri Gagarin State Technical University of Saratov
Abstract
The work investigated the effect of induction heat treatment (IHT) on the morphology of titanium samples with a coating obtained by plasma spraying (PS). It was found that the porosity of the PS coating was 57±3%. The average grain size was 9.57 μm, pores - 13.01 μm. IHT at an inductor current of 2.6 kA led to an increase in the average grain size to 11.12 μm, while the pore size remained practically unchanged and amounted to 12.40 μm. The porosity of the coating also did not change and remained equal to 58±5%. With an increase in the inductor current to 8 kA, the average grain and pore size decreased to 8.95 and 8.12 μm, respectively. The porosity of the modified layer did not change and remained equal to 58±3%. The ITO process made it possible to change the shape of structural elements, namely, the shape of the grains changed from spherical to trapezoidal. Defects in the form of cracks and deep pores were not visualized on the surface of the modified layer.
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Osipova Elena Olegovna
Yuri Gagarin State Technical University of Saratov
Russia
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