Creep processes in magnesium alloys and their composites
Creep processes in magnesium alloys and their composites
A comparison is made between the creep characteristics of two squeeze-cast magnesium alloys (AZ 91 and QE 22) reinforced with 20 vol pct Al2O3 short fibers and the unreinforced AZ 91 and QE 22 matrix alloys. The results show the creep resistance of the reinforced materials is considerably improved by comparison with the unreinforced matrix alloys. It is suggested that creep strengthening in these short-fiber composites arises primarily from the existence of a threshold stress and the effect of load transfer. By testing samples to failure, it is demonstrated that the unreinforced and reinforced materials exhibit similar times to failure at the higher stress levels. A detailed microstructural investigation by transmission electron microscopy (TEM) reveals no substantial changes in matrix microstructure due to the presence of the reinforcement. This suggests that direct composite strengthening dominates over indirect effects.
883-889
Sklenicka, V.
4c8c6581-ff65-448b-8e15-cdd9846280c3
Pahutova, M.
7394b3f4-8a8b-4ab8-8ab1-d6d818e7a8c2
Kucharova, K.
50cef2b7-4735-4068-872c-df3937fe91ea
Svoboda, M.
45c8aa4b-12d0-453b-97b5-c5c69ee6cc6b
Langdon, T.G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
2002
Sklenicka, V.
4c8c6581-ff65-448b-8e15-cdd9846280c3
Pahutova, M.
7394b3f4-8a8b-4ab8-8ab1-d6d818e7a8c2
Kucharova, K.
50cef2b7-4735-4068-872c-df3937fe91ea
Svoboda, M.
45c8aa4b-12d0-453b-97b5-c5c69ee6cc6b
Langdon, T.G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
Sklenicka, V., Pahutova, M., Kucharova, K., Svoboda, M. and Langdon, T.G.
(2002)
Creep processes in magnesium alloys and their composites.
Metallurgical and Materials Transactions, 33A (3A), .
Abstract
A comparison is made between the creep characteristics of two squeeze-cast magnesium alloys (AZ 91 and QE 22) reinforced with 20 vol pct Al2O3 short fibers and the unreinforced AZ 91 and QE 22 matrix alloys. The results show the creep resistance of the reinforced materials is considerably improved by comparison with the unreinforced matrix alloys. It is suggested that creep strengthening in these short-fiber composites arises primarily from the existence of a threshold stress and the effect of load transfer. By testing samples to failure, it is demonstrated that the unreinforced and reinforced materials exhibit similar times to failure at the higher stress levels. A detailed microstructural investigation by transmission electron microscopy (TEM) reveals no substantial changes in matrix microstructure due to the presence of the reinforcement. This suggests that direct composite strengthening dominates over indirect effects.
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Published date: 2002
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Mid-March issue
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Local EPrints ID: 23801
URI: http://eprints.soton.ac.uk/id/eprint/23801
PURE UUID: 08b51119-2449-43b9-8e31-cdd503801d0b
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Date deposited: 28 Mar 2006
Last modified: 09 Jan 2022 03:09
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Author:
V. Sklenicka
Author:
M. Pahutova
Author:
K. Kucharova
Author:
M. Svoboda
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