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NI3AL-B ALLOYS AND THEIR MECHANICAL PROPERTIES AT HIGH TEMPERATURES

1 Pohludka Martin
Co-authors:
1 Malcharcziková Jitka 1 Kursa Miroslav 1 Kawulok Rostislav 1 Opěla Petr
Institution:
1 VSB – Technical University of Ostrava, Ostrava, Czech Republic, EU, martin.pohludka@vsb.cz, jitka.malcharczikova@vsb.cz, miroslav.kursa@vsb.cz, rostislav.kawulok@vsb.cz, petr.opela@vsb.cz
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:
1498-1503
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:
440 views / 257 downloads
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Abstract

The Ni-22Al-0.5B and Ni-24Al-0.5B alloys (at.%) were prepared by a vacuum induction melting process followed by a gravity casting process. The castings were directionally solidified in a resistance furnace at a temperature of 1550 °C and rate of directional solidification of 50 mm h-1. The castings and ingots after directional solidification were used for preparation of samples for a compression test. These tests were carried out at a temperature of 800 °C and deformation rate of 5·10-2 s-1. The samples were shaped as a short cylinder (8 12 mm). The results of the compression tests have confirmed that the directionally solidified Ni3Al alloys alloyed with boron have a higher yield strength than the castings of these alloys and the Ni3Al alloys unalloyed with boron.

Keywords: nickel aluminides, directional solidification, compression test

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