MICROSTRUCTURE AND PURITY OF NITIZR-BASED ALLOYS PREPARED BY A PLASMA METALLURGY PROCESS AND VACUUM INDUCTION MELTING

1 STRUNG Václav
Co-authors:
1 SZURMAN Ivo 1 ČEGAN Tomáš 1 PETLÁK Daniel 1 VONTOROVÁ Jiřina
Institution:
1 VSB – Technical university of Ostrava, Faculty of Materials Science and Technology, 17. listopadu 15/2172, 708 33 Ostrava – Poruba, Czech Republic, EU, vaclav.strung@vsb.cz
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:
1709-1714
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:
62 views / 20 downloads
Abstract

Ni-45Ti-5Zr (at%) alloy was prepared by two different methods – by plasma and vacuum induction melting. Two samples were cut out both the ingots – the first out the edge and the second out the centre of the ingots. The aim was to confirm homogeneity of the ingots. Metalographical sections were used for photodocumenting of a microstructure, for verifying of chemical composition with EDS analysis and for statistic description of phases. Moreover, both the ingots were used for determination of C and O contents. In the both cases, structure was polycrystaline with a significant Zr segregation along dendrite boundaries. Chemical composition for the centre and the edge of the ingots was different only for the ingot prepared by plasma metallurgy. Unfortunately, both the ingots were contaminated with higher C and O contents.

Keywords: NiTiZr-based alloys, microstructure, plasma metallurgy, vacuum induction melting, purity
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