期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 509, 期 34, 页码 8567-8572出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2011.06.017
关键词
Magnesium alloy; Mechanical Property; Damping; Transmission electron microscope; Long period stacking ordered phase
资金
- Joint Foundation
- National Natural Science Foundation Commission of China
- China Academy of Engineering Physics [10876045]
- National Basic Research Program of China [2007CB613704]
- National Key Technology RD Program [2011BAE22B04]
- National Natural Science Foundation of China [50725413]
The present work mainly investigated the microstructures, mechanical properties, and damping capacities of as-extruded Mg-Zn-Y-Zr alloys with varied phase composition. Alloys of MgZn(2), W-phases (Mg(3)Y(2)Zn(3)), I-phases (Mg(3)YZn(6)), and X-phases (Mg(12)YZn) were obtained by adjusting the Zn/Y ratio (in wt%). The crystallographic structure of the X-phase [long period stacking ordered (LPSO) phase] and the crystallographic relationship between the W-phase and the Mg matrix were determined. The strengthening effects of the phase composition on the alloys exhibited the following trend: W + LPSO > LPSO>W + I > MgZn(2). Variations in the phase composition resulted in almost consistent variations in the damping capacities of the alloys compared with their mechanical properties. The LPSO structural phase could enhance the mechanical properties and simultaneously maintain the good damping capacity of the alloys. (C) 2011 Elsevier B.V. All rights reserved.
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