Please use this identifier to cite or link to this item: doi:10.22028/D291-23827
Title: Creep in dispersion strengthened aluminium alloys at high temperature : a model based approach
Author(s): Rösler, Joachim
Arzt, Eduard
Language: English
Year of Publication: 1989
OPUS Source: New materials by mechanical alloying techniques / Arzt, Eduard ... (eds.). - Oberursel : DGM, 1989, S. 279-286
SWD key words: Verteilung
DDC notations: 620 Engineering and machine engineering
Publikation type: Conference Paper
Abstract: The mechanism of dispersion strengthening has been studied in dispersion-strengthened aluminium alloys produced by reaction milling. The beneficial effect of second phase particles is usually attributed to the existence of a "Threshold stress", below which particles cannot be surmounted by climbing dislocations. But, as well be shown below, predictions of this "threshold stress" concept are widely inconsistend with the experimentally observed creep behaviour. A new constitutive equation is proposed which is based on TEM observations suggesting thermally activated dislocation detachment from the particles to be rate controlling. Creep in several dispersion-strengthened alloys can be consistently described with this concept, which also points to ways of optimizing these alloys.
Link to this record: urn:nbn:de:bsz:291-scidok-17789
ISBN: 3-88355-133-3
Date of registration: 3-Dec-2008
Faculty: SE - Sonstige Einrichtungen
Department: SE - INM Leibniz-Institut für Neue Materialien
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