Modification of Ti-6A1-4V alloy element and phase composition by compression plasma flows impact

SURFACE & COATINGS TECHNOLOGY

卷:355

Article; Proceedings Paper

Cherenda, N. N.^1,2  Basalai, A. V.³  Shymanski, V. I.^1,2  Uglov, V. V.^1,2  Astashynski, V. M.⁴  Kuzmitski, A. M.⁴  Laskovnev, A. P.⁵  Remnev, G. E.² 

[1] Belarusian State Univ, Nezavisimosti Ave 4, Minsk 220030, BELARUS

[2] Natl Res Tomsk Polytech Univ, Lenin Ave 2a, Tomsk 634028, Russia

[3] Natl Acad Sci Belarus, Phys Tech Inst, Kuprevicha Str 10, Minsk 220141, BELARUS

[4] Natl Acad Sci Belarus, AV Lutkov Heat & Mass Transfer Inst, P Brovki Str 15, Minsk 220072, BELARUS

[5] Natl Acad Sci Belarus, Presidium, Nezavisimosti Ave 66, Minsk 220072, BELARUS

关键词: Titanium alloy;    Ti-6A1-4V;    Compression plasma flow;    Phase and element composition;    Zirconium;    Alloying;    Microhardness;   

DOI  :  10.1016/j.surfcoat.2018.02.048

来源: Elsevier

【 摘 要 】

Phase and element composition, microhardness of Ti-6A1-4V titanium alloy, Ti/Ti-6A1-4V and Zr/Ti-6A1-4V systems treated by compression plasma flows have been investigated in this work. X-ray diffraction, scanning electron microscopy, energy-dispersion X-ray microanalysis and Vickers microhardness measurements were used for samples characterization. The findings showed that treatment of the coating/titanium alloy system by compression plasma flows allowed decreasing the toxic elements (Al, V) concentration in the surface layer of Ti-6A1-4V titanium alloy. The variation of the energy absorbed by the surface layer resulted in the change of the element concentration and the formation of a number of phases in the modified layer: a solid solution on the basis of alpha' phase in Ti-6A1-4V and Ti/Ti-6A1-4V systems and beta phase in Zr/Ti-6A1-4V system. The formation of delta-TiNx at the surface due to interaction of surface layer atoms with nitrogen atmosphere in the vacuum chamber was also found. The change of phase composition and quenching effects resulted in the microhardness increase.

【 授权许可】

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