期刊
JOURNAL OF MAGNESIUM AND ALLOYS
卷 8, 期 1, 页码 103-110出版社
KEAI PUBLISHING LTD
DOI: 10.1016/j.jma.2019.11.012
关键词
WE43 magnesium alloy; Pre-deformation; Aging; Microstructure; Mechanical properties
资金
- GDAS' Project of Science and Technology Development [2018GDASCX-0966, 2019GDASYL-0203002, 2018GDASCX-0117]
- Guangzhou Science and Technology Planning Project [201904010309]
In this work, the microstructural evolution and mechanical properties of a pre-deformed WE43 magnesium alloy when aged at 250 and 300 degrees C were further investigated. It is found that the abundant deformation twins introduced by pre-deformation were maintained within the alloy during the aging treatment. Second particles formed at the twin boundaries and coarsened with aging time, especially at 300 degrees C. When peak-aged at 250 degrees C, the fine metastable beta''' and beta' precipitates formed in the un-deformed alloy have been transformed into relatively large beta(1) and beta precipitates by the pre-deformation. While peak-aged at 300 degrees C, the pre-deformation obviously refined the beta precipitates. Mechanical properties indicate that pre-deformation can increase the yield strength by 19 MPa and 54 MPa for the peak-aged alloy at 250 degrees C and 300 degrees C, respectively, and will not obviously deteriorate the tensile elongations. (c) 2020 Published by Elsevier B.V. on behalf of Chongqing University.
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