Fatigue Crack Growth in Flow Formed INCONEL 718

Costa Coleman; Martin R. Bache; Carl Boettcher

doi:10.4028/www.scientific.net/MSF.879.374

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HomeMaterials Science ForumMaterials Science Forum Vol. 879Fatigue Crack Growth in Flow Formed INCONEL 718

Fatigue Crack Growth in Flow Formed INCONEL 718

Abstract:

Fatigue crack propagation has been measured in flow formed Inconel 718 (IN718). Test pieces were extracted from a flow formed tubular structure in the longitudinal direction, retaining the tube curvature across their width. Crack growth rates (da/dN) were measured at 20, 300, and 400oC. For comparison, tests were repeated on specimens with an identical geometry but machined from conventionally forged IN718. Detailed metallurgy of the flow formed material is presented.

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Materials Science Forum (Volume 879)

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374-379

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https://doi.org/10.4028/www.scientific.net/MSF.879.374

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Online since:

November 2016

Authors:

Costa Coleman*, Martin R. Bache, Carl Boettcher

Keywords:

Fatigue Crack Growth, Flow Forming, IN718, Microstructure

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