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Intrinsic thresholds in polycrystalline Udimet 720

Reed, P.A.S., Gale, W.F. and King, J.E. (1993) Intrinsic thresholds in polycrystalline Udimet 720 Materials Science and Technology, 9, (4), pp. 281-287.

Record type: Article


The long crack threshold behaviour of polycrystalline Udimet 720 has been investigated. Faceted crack growth is seen near threshold when the monotonic crack tip plastic zone is contained within the coarsest grain size. At very high load ratios R(=P[min]/P[max]) it is possible for the monotonic crack tip plastic zone to exceed the coarsest grain size throughout the entire crack growth regime and non-faceted structure insensitive crack growth is then seen down to threshold. Intrinsic threshold values were obtained for non-faceted and faceted crack growth using a constant K[max], increasing K[min], computer controlled load shedding technique (K is stress intensity factor).

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Published date: 1993
Keywords: polycrystal, mechanical properties, rupture, microstructure, crack propagation, fatigue crack, stress intensity factor, crack closure effect, superalloy, nickel alloys, transition metal alloys
Organisations: Engineering Mats & Surface Engineerg Gp


Local EPrints ID: 43056
ISSN: 0267-0836
PURE UUID: 3d07edbf-d6d3-452a-ad46-45ede608ff82
ORCID for P.A.S. Reed: ORCID iD

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Date deposited: 10 Jan 2007
Last modified: 17 Jul 2017 15:20

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Author: P.A.S. Reed ORCID iD
Author: W.F. Gale
Author: J.E. King

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