Please use this identifier to cite or link to this item: doi:10.22028/D291-23814
Title: A new model-based creep equation for dispersion strengthened materials
Author(s): Rösler, Joachim
Arzt, Eduard
Language: English
Year of Publication: 1990
OPUS Source: Acta metallurgica et materialia. - 38. 1990, 4, S. 671-683
SWD key words: Stoffeigenschaft
DDC notations: 620 Engineering and machine engineering
Publikation type: Journal Article
Abstract: The strongly stress-sensitive and temperature-dependent creep behaviour of dispersion strengthened materials cannot be described satisfactorily by current creep laws. In this paper a new creep equation is developed which considers as the rate-controlling event the thermally activated detachment of dislocations from dispersoid particles exerting an attractive force. The approach is motivated by recent TEM observations and theoretical calculations which strongly suggest that the "classical" view, according to which particles merely force dislocations to climb around them, is inadequate. The creep equation is applied to a dispersion-strengthened superalloy, two aluminium alloys and bubble-strengthened tungsten. Practical conclusions, regarding the optimum dispersoid size and alloy development, are drawn.
Link to this record: urn:nbn:de:bsz:291-scidok-17550
Date of registration: 18-Nov-2008
Faculty: SE - Sonstige Einrichtungen
Department: SE - INM Leibniz-Institut für Neue Materialien
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