Effect of Structure on Creep Behaviour of Superalloy Single Crystals-Reference-Cited by-同舟云学术

Effect of Structure on Creep Behaviour of Superalloy Single Crystals

Published:2005-04 Issue: Volume:482 Page:267-270
ISSN:1662-9752
Container-title:Materials Science Forum
language:
Short-container-title:MSF

Author:

Lukáš Petr¹,Kunz Ludvík¹,Svoboda Milan²,Čadek J.

Affiliation:

1. Academy of Sciences of Czech Republic

2. Academy of Science of Czech Republic

Abstract

Creep behaviour of two types of superalloy single crystals of the orientation <001> was studied at 850 °C in air to assess their relative suitability for turbine blade applications: CMSX-4 and its potential low cost alternative, CM186LC. The chemical composition of these two superalloys is similar, their microstructure, especially g/g’ distribution, differs substantially. At the same applied stress, the time to failure of CM186LC is shorter than that of CMSX-4. Simultaneously, the creep rate of CM186LC is higher than that of CMSX-4 for the whole lifetime. This is attributed to easier activation of dislocation sources within large g’particles present in CM186LC crystals.

Publisher

Trans Tech Publications, Ltd.

Subject

Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics,General Materials Science

Link

https://www.scientific.net/MSF.482.267.pdf

Reference4 articles.

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4. T. M. Pollock and A. S. Argon: Acta metal. mater. Vol. 40 (1992), p.1. ACKNOWLEDGEMENT This research was supported by the Academy of Sciences of the Czech Republic under the contracts S2041001 and Z2041904. This support is gratefully acknowledged.