Abstract
Creep behavior of metal matrix composites is similar to dispersion strengthen alloys and characterized by the presence of a threshold stress below which the creep rate is negligible. This threshold stress is attributed, at least in dispersion-strengthened alloys, to dislocation particle interactions in which the detachment of the dislocations from the particle is the rate-limiting step. Creep experiments were performed on an Al-5Y2O3-10SiC composite in the temperature range of 473 and 573 K and the nature of the dislocation-particle interaction was determined by performing in situ straining experiments at elevated temperature in a transmission electron microscope. the threshold stress and the detachment stress are temperature dependent, and the detachment stress is less than the threshold stress emphasizing the contribution of load transfer from the matrix to the reinforcement phase. © 2009 Elsevier B.V. All rights reserved.
Recommended Citation
S. P. Deshmukh et al., "Investigation of Creep Threshold Stresses using in Situ TEM Straining Experiment in an Al-5Y2O3-10SiC Composite," Materials Science and Engineering: A, vol. 527, no. 9, pp. 2390 - 2397, Elsevier, Apr 2010.
The definitive version is available at https://doi.org/10.1016/j.msea.2009.12.015
Department(s)
Materials Science and Engineering
Keywords and Phrases
Creep; Dislocation-particle interaction; In situ TEM; Threshold stress
International Standard Serial Number (ISSN)
0921-5093
Document Type
Article - Journal
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2024 Elsevier, All rights reserved.
Publication Date
15 Apr 2010
