Creep and Low Cycle Fatigue Characterisation of IN718 TIG Butt-Welds at 620°C

D.W.J. Tanner; A.A. Becker; Thomas H. Hyde

doi:10.4028/www.scientific.net/MSF.636-637.1504

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HomeMaterials Science ForumMaterials Science Forum Vols. 636-637Creep and Low Cycle Fatigue Characterisation of...

Creep and Low Cycle Fatigue Characterisation of IN718 TIG Butt-Welds at 620°C

Abstract:

The testing setups, results and analysis of constant load creep and low-cycle high temperature fatigue tests of tungsten inert gas (TIG) butt-welded, thin-section INCONEL 718 (IN718) specimens are presented. The main objectives were to determine the effect the welds have on failure time and analyse any differences in their failure behaviour. It was found that although welded IN718 may exhibit comparatively little loss of tensile strength, its ductility and creep and high temperature fatigue properties are severely compromised due to its changed microstructure.

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Periodical:

Materials Science Forum (Volumes 636-637)

Pages:

1504-1510

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.636-637.1504

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Online since:

January 2010

Authors:

D.W.J. Tanner, A.A. Becker, Thomas H. Hyde

Keywords:

Creep, High-Temperature, Low Cycle Fatigue, Microstructure, Welded INCONEL 718

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References

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