Elevated temperature fatigue-creep behavior of nickel-base superalloy IN 625

From National Research Council Canada

DOI	Resolve DOI: https://doi.org/10.1520/STP24499S
Author	Search for: Bui-Quoc, T.; Search for: Gomuc, R.; Search for: Biron, A.; Search for: Nguyen, H. L.¹; Search for: Masounave, J.¹
Affiliation	National Research Council of Canada
Format	Text, Book Chapter
Subject	continuous cycling; fatigue-creep; tension/compression hold time; Inconel 625
Abstract	A research program has been carried out to establish the low-cycle fatigue and creep-fatigue behaviors of Inconel 625 at elevated temperatures (650 and 815°C). The main observations were related to the effect of temperature and of hold times. Under continuous cycling, a temperature increase from 650 to 815°C caused a reduction in the fatigue life by a factor of 2 at a high strain and by a factor of 3 at a low strain. Tension hold times had little detrimental effect on cyclic life at 650°C concerning the life reduction with respect to continuous cycling; at 815°C, on the other hand, this became more significant. Compressive hold times also had a damaging effect on fatigue life, and this was larger than that associated with tensile hold times; in particular, it was very pronounced for low strain levels at 815°C. An analysis of data using a life prediction method previously suggested for creep-fatigue combination loadings has also been carried out. The method takes into account the damaging effect due to a compression hold time separately from that due to a tensile hold time in interspersed creep-fatigue loadings. The overall correlation between theoretical calculations and experimental results is reasonably good, for strain levels ranging from 1.2 to 0.4%.
Publication date	1986-01-01
Publisher	ASTM International
In	Low Cycle Fatigue: 470–484.
Language	English
Peer reviewed	Yes
NRC number	CNRC 24397 NRC-IGM86-203-216
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Record identifier	c8ed94de-58d3-4c33-943c-0e81d46a415f
Record created	2019-11-06
Record modified	2020-06-10

Date modified:: 2025-11-11