Original scientific paper

Effect of temperature on mechanical properties and type of fracture of superalloys Nimonic 80A

R. Sunulahpašić ; University of Zenica, Faculty of Metallurgy and Materials Science, Zenica, BiH
M. Oruč ; University of Zenica, Metallurgical Institute „Kemal Kapetanović“, Zenica, BiH

Abstract

The Ni-base superalloys Nimonic 80A gains its appropriate microstructure and high temperature strength through precipitation hardening. In this paper, the results of mechanical testings are presented for temperature range from 25 to 850°C for the Nimonic 80A superalloys. The variation of ductility properties in dependence of temperature has been demonstrated by analysis on the stereo, optical and scanning electron microscopy and results of tensile test. It was found that different fracture mechanisms occure in a different temperature ranges. Brittle fracture was dominant at high temperatures and a significant proportion of ductile fracture at room temperature was observed.

Keywords

Nimonic 80A; tensile test; brittle fracture; ductile fracture

Hrčak ID:

64374

URI

https://hrcak.srce.hr/64374

Publication date:

1.7.2011.

Article data in other languages: croatian

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