Creep behaviour analysis of an oxide dispersion strengthened Ni3Al intermetallic material through the ñ model of dislocation-dispersoid interaction
Keywords:Creep, Ni3Al based alloys, Dispersion strengthened alloys
This research work presents an alternative description of the high temperature creep behaviour of an ordered oxide dispersion strengthened Ni3Al intermetallic material to that recently presented by Klotz et al following an Arzt and Gohring model. An apparent stress exponent, nap, of 7.8 and an apparent activation energy, Qap, of 697 kJ/mole was obtained for this material. These values are approximately double than those for the non reinforced material. The dislocation-dispersoid interaction model, termed "ñ model", considers that this interaction merely raises the stress exponent associated to the non reinforced matrix by a value of ñ. Consequently, the apparent activation energy value is simultaneously raised. The ñ model predicts accurately the experimental data and presents advantages for analysing the creep behaviour of the dispersion strengthened materials.
How to Cite
Copyright (c) 1998 Consejo Superior de Investigaciones Científicas (CSIC)
This work is licensed under a Creative Commons Attribution 4.0 International License.© CSIC. Manuscripts published in both the printed and online versions of this Journal are the property of Consejo Superior de Investigaciones Científicas, and quoting this source is a requirement for any partial or full reproduction.
All contents of this electronic edition, except where otherwise noted, are distributed under a “Creative Commons Attribution 4.0 International” (CC BY 4.0) License. You may read here the basic information and the legal text of the license. The indication of the CC BY 4.0 License must be expressly stated in this way when necessary.
Self-archiving in repositories, personal webpages or similar, of any version other than the published by the Editor, is not allowed.