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The role of matrix microstructure in the creep behaviour of discontinuous fiber-reinforced AZ 91 magnesium alloy

The role of matrix microstructure in the creep behaviour of discontinuous fiber-reinforced AZ 91 magnesium alloy
The role of matrix microstructure in the creep behaviour of discontinuous fiber-reinforced AZ 91 magnesium alloy
Constant stress tensile creep tests were conducted to failure at temperatures of 423 and 473 K on an AZ 91 (Mg–9wt.%Al–1wt.%Zn) alloy reinforced with 20 vol.% Al2O3 short fibres and on an unreinforced AZ 91 matrix alloy. The creep resistance of the reinforced material was considerably improved by comparison with the matrix alloy. A microstructural investigation revealed that the most frequent morphology of the ?-phase precipitates in the composite is continuous Mg17Al12 platelets. Detailed investigations using transmission electron microscopy indicate that the matrix microstructure has no significant influence on the creep properties of these two materials. This result confirms the proposal that the creep strengthening of the composite is controlled by an effective load transfer between the matrix and the fibres.
metal matrix composites, magnesium alloys, az 91, microstructural changes, creep
151-156
Svoboda, M.
45c8aa4b-12d0-453b-97b5-c5c69ee6cc6b
Pahutová, M.
e5d3e6d4-b4f5-4b54-90d3-7ea618b743a4
Kuchatová, K.
856b5578-a1c5-4309-942d-e40fb36118b8
Sklenicka, V.
4c8c6581-ff65-448b-8e15-cdd9846280c3
Langdon, T.G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
Svoboda, M.
45c8aa4b-12d0-453b-97b5-c5c69ee6cc6b
Pahutová, M.
e5d3e6d4-b4f5-4b54-90d3-7ea618b743a4
Kuchatová, K.
856b5578-a1c5-4309-942d-e40fb36118b8
Sklenicka, V.
4c8c6581-ff65-448b-8e15-cdd9846280c3
Langdon, T.G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86

Svoboda, M., Pahutová, M., Kuchatová, K., Sklenicka, V. and Langdon, T.G. (2002) The role of matrix microstructure in the creep behaviour of discontinuous fiber-reinforced AZ 91 magnesium alloy. Materials Science and Engineering, 324 (1-2), 151-156. (doi:10.1016/S0921-5093(01)01298-9).

Record type: Article

Abstract

Constant stress tensile creep tests were conducted to failure at temperatures of 423 and 473 K on an AZ 91 (Mg–9wt.%Al–1wt.%Zn) alloy reinforced with 20 vol.% Al2O3 short fibres and on an unreinforced AZ 91 matrix alloy. The creep resistance of the reinforced material was considerably improved by comparison with the matrix alloy. A microstructural investigation revealed that the most frequent morphology of the ?-phase precipitates in the composite is continuous Mg17Al12 platelets. Detailed investigations using transmission electron microscopy indicate that the matrix microstructure has no significant influence on the creep properties of these two materials. This result confirms the proposal that the creep strengthening of the composite is controlled by an effective load transfer between the matrix and the fibres.

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More information

Published date: 2002
Keywords: metal matrix composites, magnesium alloys, az 91, microstructural changes, creep

Identifiers

Local EPrints ID: 23853
URI: http://eprints.soton.ac.uk/id/eprint/23853
PURE UUID: b7b91c7b-0465-4d61-bbca-534d184625a5
ORCID for T.G. Langdon: ORCID iD orcid.org/0000-0003-3541-9250

Catalogue record

Date deposited: 24 Mar 2006
Last modified: 17 Dec 2019 01:49

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Contributors

Author: M. Svoboda
Author: M. Pahutová
Author: K. Kuchatová
Author: V. Sklenicka
Author: T.G. Langdon ORCID iD

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