THE HIGH-TEMPERATURE STRENGTH AND PLASTIC PROPERTIES OF INCOLOY 800HT AND INVAR 36 ALLOYS

1 KAWULOK Petr
Co-authors:
1 KAWULOK Rostislav 1 JUREK David 1 PUZOŇ David 1 SCHINDLER Ivo 1 OPĚLA Petr 1 RUSZ Stanislav 1 KAWULOKOVÁ Monika
Institution:
1 VSB - Technical University of Ostrava, Faculty of Materials Science and Technology, Ostrava - Poruba, Czech Republic, EU, petr.kawulok@vsb.cz, rostislav.kawulok@vsb.cz david.jurek.st@vsb.cz, david.puzon.st@vsb.cz, ivo.schindler@vsb.cz, petr.opela@vsb.cz, stanislav.rusz2@vsb.cz, monika.kawulokova@vsb.cz
Conference:
30th Anniversary International Conference on Metallurgy and Materials, Brno, Czech Republic, EU, May 26 - 28, 2021
Proceedings:
Proceedings 30th Anniversary International Conference on Metallurgy and Materials
Pages:
276-281
ISBN:
978-80-87294-99-4
ISSN:
2694-9296
Published:
15th September 2021
Proceedings of the conference have already been published in Scopus and we are waiting for evaluation and potential indexing in Web of Science.
Metrics:
368 views / 197 downloads
Abstract

By using of hot tensile tests, which were realized on the simulator HDS-20, the strength and plastic properties of two progressive alloys, based on Fe-Ni-Cr (Incoloy 800HT) and Fe-Ni (Invar 36), were experimentally determined. By a special type of a tensile test, involving a continuous control heating of the tested specimens at their simultaneous load by a constant tensile force of 80 N, a nil-strength temperature of both investigated alloys was determined. In comparison to the Invar 36 alloy, the Incoloy 800HT alloy showed a 71 °C lower nil-strength temperature. By continuous uniaxial tensile tests to rupture, which were performed in a range of deformation temperatures of 800 – 1,390 °C at a constant tensile rate of 1 mm·s-1, the strength and plastic properties of both investigated alloys were examined. In comparison to the Invar 36 alloy, the Incoloy 800HT alloy showed in the whole range of deformation temperatures a higher strength. A nil-ductility temperature of the Incoloy 800HT and Invar 36 alloys was 1310 °C and 1390 °C, respectively. A difference between the nil-strength temperature and the nil-ductility temperature was in the case of the Incoloy 800HT and Invar 36 alloy established as 38 °C and 29 °C, respectively.

Keywords: Incoloy 800HT, Invar 36, nil-strength temperature, nil-ductility temperature

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