Titre du document / Document title
Intrinsic thresholds in polycrystalline Udimet 720
Auteur(s) / Author(s)
REED P. A. S. ;
GALE W. F. ;
KING J. E. ;
Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)
Univ. Cambridge, dep. materials sci. metallurgy, ROYAUME-UNI
Résumé / Abstract
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)
Revue / Journal Title
Materials science and technology
ISSN
0267-0836
CODEN MSCTEP
Source / Source
1993, vol. 9, n
o4, pp. 281-287 (9 ref.)
Langue / Language
Anglais
Editeur / Publisher
Maney, London, ROYAUME-UNI
(1985)
(Revue)
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Localisation / Location
INIST-CNRS, Cote INIST : 20742, 35400003499671.0020
Nº notice refdoc (ud4) : 4841294
