Creep properties of an Al-2024 composite reinforced with SiC particulates
Spigarelli, S., Cabibbo, M., Evangelista, E. and Langdon, T.G. (2002) Creep properties of an Al-2024 composite reinforced with SiC particulates. Materials Science and Engineering A, 328, (1-2), 39-47. (doi:10.1016/S0921-5093(01)01698-7).
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Description/Abstract
Creep tests were conducted on an Al-2024 alloy reinforced with 15% SiC particulates. In this composite, as in earlier experiments on the unreinforced Al-2024 alloy, there is a continuous precipitation of fine particles throughout the tests. The creep behaviour of the composite reveals the presence of a threshold stress, and this stress depends upon both temperature and applied stress because more copious precipitation occurs in the more time-consuming tests conducted at the lower stress levels. The results for the composite are analysed using a procedure similar to that developed earlier for the unreinforced alloy. It is shown that the rate-controlling deformation mechanism is dislocation climb within the matrix alloy with a stress exponent of about 4.4 and an activation energy equal to that anticipated for lattice self-diffusion in pure aluminium.
| Item Type: | Article |
|---|---|
| ISSNs: | 0921-5093 (print) |
| Related URLs: | |
| Keywords: | aluminium alloys, creep, composites, threshold stress |
| Subjects: | T Technology > TJ Mechanical engineering and machinery Q Science > QD Chemistry Q Science > QC Physics |
| Divisions: | University Structure - Pre August 2011 > School of Engineering Sciences |
| Item ID: | 23804 |
| Date Deposited: | 27 Mar 2006 |
| Last Modified: | 01 Jun 2011 13:46 |
| Contributors: | Spigarelli, S. (Author) Cabibbo, M. (Author) Evangelista, E. (Author) Langdon, T.G. (Author) |
| Date: | 2002 |
| Status: | Published |
| Contact Email Address: | spiga@popcsi.unian.it |
| URI: | http://eprints.soton.ac.uk/id/eprint/23804 |
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