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EFFECT OF COLD SWAGING ON MECHANICAL PROPERTIES AND STRUCTURAL CHARACTERISTIC OF TUNGSTEN-BASED ALLOY

1 BAGHIROVA Banovsha
Co-authors:
1 DOHNALÍK Daniel 2 POHLUDKA Martin 3 MAREK Martin
Institutions:
1 VŠB - Technical University of Ostrava, Department of Materials Forming, 17. listopadu 15, Ostrava-Poruba, 70833, Czech Republic, EU
2 VŠB - Technical University of Ostrava, Regional Materials Science and Technology Centre, 17. listopadu 15, 70833 Ostrava-Poruba, Czech Republic, EU
3 VŠB - Technical University of Ostrava, Department of Applied Mechanics, 17. listopadu 15, 70833 Ostrava-Poruba, Czech Republic, EU
Conference:
25th Anniversary International Conference on Metallurgy and Materials, Hotel Voronez I, Brno, Czech Republic, EU, May 25th - 27th 2016
Proceedings:
Proceedings 25th Anniversary International Conference on Metallurgy and Materials
Pages:
1323-1328
ISBN:
978-80-87294-67-3
ISSN:
2694-9296
Published:
14th December 2016
Proceedings of the conference were published in Web of Science and Scopus.
Metrics:
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Abstract

The aim of this paper was to verify changes in mechanical properties and structural characteristic of the 91W6Ni3Co powders mixture after cold swaging, before which the initial powders were pressed using cold isostatic pressing (CIP) and pre-sintered. Swaging was carried out at room temperature in one pass from the initial diameter of 30 mm to the final diameter of 25 mm. The investigation of the sample after pre-sintering and subsequent swaging was performed by microscopic and microhardness analyses, as well as by tensile testing. The results have shown the elongation of tungsten grains to increase with strain. The strength of the material after swaging was more than double comparing to the original state.

Keywords: cold swaging, tungsten, microhardness, microstructure, powders

© This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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