FABRICATION OF TITANIUM ORTHORHOMBIC ALLOY SPHERICAL POWDERS BY MECHANICAL ALLOYING AND PLASMA SPHEROIDIZATION FOR APPLICATION IN ADDITIVE MANUFACTURING PROCESSES

1 POLOZOV Igor
Co-authors:
1 RAZUMOV Nikolay 1 MAKHMUTOV Tagir 1 POPOVICH Anatoliy
Institution:
1 Peter the Great St, Petersburg Polytechnic University, St. Petersburg, Russian Federation polozov_ia@spbstu.ru
Conference:
28th International Conference on Metallurgy and Materials, Hotel Voronez I, Brno, Czech Republic, EU, May 22nd - 24th 2019
Proceedings:
Proceedings 28th International Conference on Metallurgy and Materials
Pages:
1658-1662
ISBN:
978-80-87294-92-5
ISSN:
2694-9296
Published:
4th November 2019
Proceedings of the conference were published in Web of Science and Scopus.
Metrics:
28 views / 14 downloads
Abstract

The microstructural and phase evolution of the powders at different times of milling and after treatment in the flow of the thermal plasma were studied. The X-Ray Diffraction and Scanning Electron Microscopy studies showed that increasing milling time up to 12 h improves chemical homogeneity of the powders and promotes the formation of B2/β-phase solid solution, while at shorter milling times the powders consist of a highly inhomogeneous layered structure with HPC- and BCC-crystal structures. The plasma spheroidization of irregular powders after MA resulted in highly-spherical powders of the orthorhombic alloy with a homogeneous chemical composition consisting of dendritic B2-phase. The fabricated spherical powders can be utilized in Additive Manufacturing processes to fabricate intermetallic components.

Keywords: Mechanical alloying, plasma spheroidization, titanium alloy, intermetallic
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