Numéro
J. Phys. IV France
Volume 03, Numéro C7, Novembre 1993
The 3rd European Conference on Advanced Materials and Processes
Troisiéme Conférence Européenne sur les Matériaux et les Procédés Avancés
Page(s) C7-283 - C7-288
DOI http://dx.doi.org/10.1051/jp4:1993745
The 3rd European Conference on Advanced Materials and Processes
Troisiéme Conférence Européenne sur les Matériaux et les Procédés Avancés

J. Phys. IV France 03 (1993) C7-283-C7-288

DOI: 10.1051/jp4:1993745

Heat treatment structure modification of wrought nickel based superalloy and its creep resistance

J. ZRNÍK1 and V. VRCHOVINSKÝ2

1  Technical University of Ko[MATH]ice, Department of Material Science Park, komenského 11, 040 02 Ko[MATH]ice, Slovakia
2  Technical University of Kosice, Department of Material Science Park, komenského 11, 040 02 Kosice, Slovakia


Abstract
The effect of structure modification on creep characteristics of nickel based superalloy EI 698 VD has been studied. The substructure changes were caused by variation of the temperature and time parameters in solution treatments and in precipitation annealing process of the alloy. Through the change of gamma prime morphology and extent of M23C6 carbide precipitation on grain boundaries the creep strength and plastic characteristics were influenced. Significant decrease of lifetime was accompanied with remarkable increase of relative proportion of intercrystalline cleavage fracture mechanisms.



© EDP Sciences 1993