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Flow mechanisms in creep of short fibre AZ91 alloy-based composite

Flow mechanisms in creep of short fibre AZ91 alloy-based composite
Flow mechanisms in creep of short fibre AZ91 alloy-based composite
A comparison between the creep characteristics of an AZ91 magnesium alloy reinforced with 20 vol.% Al2O3 short fibres and an unreinforced AZ91 matrix alloy shows that the creep resistance of the reinforced material is considerably improved compared to the matrix alloy. It is suggested that the creep strengthening in the composite arises mainly from the existence of a threshold stress and the load transfer effect. The values of the threshold stress in the creep of the composite at temperatures in the range from 373 to 673 K were estimated using standard methods. It is proposed that the threshold stress arises from an attractive interaction between mobile dislocations and Mg17(Al, Zn)12 precipitates.
0023-432X
34-44
Pahutova, M.
7394b3f4-8a8b-4ab8-8ab1-d6d818e7a8c2
Sklenicka, V.
4c8c6581-ff65-448b-8e15-cdd9846280c3
Kucharova, K.
50cef2b7-4735-4068-872c-df3937fe91ea
Svoboda, M.
45c8aa4b-12d0-453b-97b5-c5c69ee6cc6b
Langdon, T.G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
Pahutova, M.
7394b3f4-8a8b-4ab8-8ab1-d6d818e7a8c2
Sklenicka, V.
4c8c6581-ff65-448b-8e15-cdd9846280c3
Kucharova, K.
50cef2b7-4735-4068-872c-df3937fe91ea
Svoboda, M.
45c8aa4b-12d0-453b-97b5-c5c69ee6cc6b
Langdon, T.G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86

Pahutova, M., Sklenicka, V., Kucharova, K., Svoboda, M. and Langdon, T.G. (2005) Flow mechanisms in creep of short fibre AZ91 alloy-based composite. Kovové materiály - Metallic Materials, 43 (1), 34-44.

Record type: Article

Abstract

A comparison between the creep characteristics of an AZ91 magnesium alloy reinforced with 20 vol.% Al2O3 short fibres and an unreinforced AZ91 matrix alloy shows that the creep resistance of the reinforced material is considerably improved compared to the matrix alloy. It is suggested that the creep strengthening in the composite arises mainly from the existence of a threshold stress and the load transfer effect. The values of the threshold stress in the creep of the composite at temperatures in the range from 373 to 673 K were estimated using standard methods. It is proposed that the threshold stress arises from an attractive interaction between mobile dislocations and Mg17(Al, Zn)12 precipitates.

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Published date: 2005
Organisations: Engineering Sciences
Learn more about Engineering Sciences research

Identifiers

Local EPrints ID: 23833
URI: http://eprints.soton.ac.uk/id/eprint/23833
ISSN: 0023-432X
PURE UUID: 55c58c85-a9c6-420d-bf59-503e1fcea25d
ORCID for T.G. Langdon: ORCID iD orcid.org/0000-0003-3541-9250

Catalogue record

Date deposited: 22 Mar 2006
Last modified: 09 Jan 2022 03:09

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Contributors

Author: M. Pahutova
Author: V. Sklenicka
Author: K. Kucharova
Author: M. Svoboda
Author: T.G. Langdon ORCID iD

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