Journal
MATERIALS CHARACTERIZATION
Volume 113, Issue -, Pages 214-221Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.matchar.2016.01.021
Keywords
Magnesium alloy; Microstructure; Mechanical properties; Precipitates
Categories
Funding
- National Key Basic Research Program of China [2013CB632201]
- National Natural Science Foundation of China [51131009, 51201189, 51421001]
- Natural Science Foundation [cstc2013jcyjA50037]
- Fundamental Research Funds for the Central Universities [CDJZR 12130073, CDJZR 12130042]
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The effects of Zn additions on the age hardening response and microstructure of Mg-9Al-6Sn (wt.%) alloy have been investigated. It is found that the Zn additions can remarkably increase the alloy hardness in the as-quenched condition. The peak hardness value of the Mg-9AI-6Sn alloy increases from 90 +/- 0.87 HV to 103 +/- 3.83 HV, when the Zn addition is 3 wt.%, which is the highest among the magnesium casting alloys that are free of rare-earth elements. The enhanced hardness in the Mg-9A1-6Sn-3Zn alloy is attributable to an increased volume fraction of smaller Mg2Sn particles in the solution-treated condition and the formation of [0001](Mg) Mg17Al12 rods and Mg-21(Zn, Al)(17) precipitates in the peak-aged condition. (C) 2016 Elsevier Inc All rights reserved.
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