Reduced Dwell-Fatigue Resistance in a Ni-Base Superalloy After Short-Term Thermal Exposure
Artikel i vetenskaplig tidskrift, 2014

The effect of short-term thermal exposure on microstructure and dwell-fatigue resistance of Ni-base superalloy 718Plus was investigated. Contrary to previous studies performed after long-term exposure, an increase in the dwell-fatigue crack growth rate was observed, which was connected to a small increase in the size of the hardening precipitates. The proposed controlling mechanism was the stress relaxation rate at the crack tip, and based on this a schematic model for the development of the properties during exposure is presented.

Författare

Magnus Hörnqvist Colliander

Chalmers, Teknisk fysik, Materialens mikrostruktur

Leif Viskari

Chalmers, Teknisk fysik, Materialens mikrostruktur

Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science

1073-5623 (ISSN)

Vol. 45 6 2699-2703

Ämneskategorier

Annan teknik

Annan materialteknik

Styrkeområden

Materialvetenskap

DOI

10.1007/s11661-014-2291-4