Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 639, Issue -, Pages 541-546Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2015.03.208
Keywords
Magnesium alloys; Damping; Long-period stacking ordered structure; Mechanical property
Categories
Funding
- National Natural Science Foundation Commission of China [51271206]
- National Basic Research Program of China [2013CB632201]
- Program for New Century Excellent Talents in University - China [NCET-11-0554]
- State Key Laboratory of Mechanical Transmission - Chongqing University [SKLMT-ZZKT-2012 MS]
- Key Laboratory of Science and Technology on High Energy Laser, CAEP
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The effects of heat treatment on the morphology of long-period stacking ordered (LPSO) phase, the corresponding damping capacities and mechanical properties of Mg95.3Zn2Y2.7 dual phase alloys are investigated in the present study. The block, lamellar, and rod-shaped LPSO phases can be obtained through different heat treatment processes. The grain size changes minimally and no new phase is found in the processes. Comparison of the mechanical properties and damping capacities of the alloys with different morphologies, it reveals that the block LPSO are more conducive to the strength of the alloy and that the lamellar phases precipitated in the matrix decrease the elongation. Meanwhile, it can conclude that the appearance of the rod-shaped LPSO phase illustrates that damping capacities notably increase while maintain a high yield strength. The alloy, which features a rod-shaped LPSO phase, exhibits an ultimate tensile strength (UTS) of 210 MPa, elongation (EL) of 7.5%, yield strength (YS) of 100 MPa and damping capacity of 0.052 at epsilon = 10 (3); as such, this alloy presents fine comprehensive performance. (C) 2015 Elsevier B.V. All rights reserved.
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