http://www.cnr.it/ontology/cnr/individuo/prodotto/ID21579

Creep-Rupture Behavior of a Directionally Solidified Nickel-Base Superalloy (Articolo in rivista)

Type

Label

Creep-Rupture Behavior of a Directionally Solidified Nickel-Base Superalloy (Articolo in rivista) (literal)

Anno

Alternative label

Guo J.T. 1, Yuan C. 1, Yang H.C. 1, Lupinc V. 2, Maldini M. 2 (2001)
Creep-Rupture Behavior of a Directionally Solidified Nickel-Base Superalloy
(literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori

Pagina inizio

Pagina fine

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#descrizioneSinteticaDelProdotto

Description of creep rupture behavior of the directionally solidified (DS) Ni-base superalloy DZ17G investigated over 60 to 950 MPa at 923 to 1323 K. Detailed creep deformation and fracture mechanisms were studied. All creep curves exhibit a short primary and a dominant accelerating creep stage, which results in higher ductility of the DS compared to the conventionally cast alloy. From the creep parameters and transmission electron microscopy observations, it is suggested that the dominant creep deformation mechanisms change from hardening particles shearing by matrix dislocations in high stress region to dislocations climb in low stress region. The fracture mode of DS superalloy is transgranular,controlled by the propagation rate of creep cracks initiated at both surface and inner microstructure discontinuities. The creep rupture data follows the Monkman-Grant relationship. (literal)

Note