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INFLUENCE OF THE COMBINED VACUUM HEAT TREATMENT AND ELECTRON BEAM SURFACE MODIFICATION ON THE ELASTIC-PLASTIC BEHAVIOR OF TI5AL4V ALLOY

1 YANKOV Emil
Co-authors:
1 NIKOLOVA Maria P. 2 PETROV Petar 1 ZAHARIEVA Vanya 2 VALKOV Stefan 2 ORMANOVA Maria
Institutions:
1 University of Ruse “A. Kanchev”, Department of Material Science and Technology, Bulgaria, EU, e-mail: eyankov@uni-ruse.bg
2 Bulgarian Academy of Sciences, Institute of Electronics, Sofia, Bulgaria, EU
Conference:
26th International Conference on Metallurgy and Materials, Hotel Voronez I, Brno, Czech Republic, EU, May 24th - 26th 2017
Proceedings:
Proceedings 26th International Conference on Metallurgy and Materials
Pages:
1549-1554
ISBN:
978-80-87294-79-6
ISSN:
2694-9296
Published:
9th January 2018
Proceedings of the conference were published in Web of Science and Scopus.
Metrics:
321 views / 134 downloads
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Abstract

The improvement of the tribological behavior of the titanium alloys used for hard implants requires the application of different treatments (heat treatment and electron beam surface modification (EBSM) by scanning electron beam) that homogenize the bulk and surface structure as compared with the as-received material. In view of analyzing the influence of the applied vacuum heat treatment on Vickers hardness in three mutually perpendicular planes of the Ti5Al4V samples in as-received, quenched and quenched and precipitated condition are used for determining the plane for scratch test analysis and application of the EBSM afterward. The aim of this study is to reveal the changes in the mechanical properties (hardness, the coefficient of friction (μ) and tangential force (Ft) at a progressive loading of the normal force (FN) up to pre-defined maximal value. The scratch results compare the heat treated and EBSM samples in different conditions in the rolling directions of testing. Such studies will be useful for further examinations of the alloy.

Keywords: Hardness, scratch, resistance to plastic deformation, concentrated energy fluxes

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