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Metals 2018, 8(8), 635; https://doi.org/10.3390/met8080635

Study on Porous Mg-Zn-Zr ZK61 Alloys Produced by Laser Additive Manufacturing

1
Laser Processing Research Center, School of Mechanical and Electric Engineering, Soochow University, Suzhou 215131, China
2
Wuxi Institution of Supervision and Testing on Product Quality, Wuxi 214000, China
*
Author to whom correspondence should be addressed.
Received: 7 July 2018 / Revised: 24 July 2018 / Accepted: 8 August 2018 / Published: 13 August 2018
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Abstract

This study reports the effect of Zn contents on surface morphology, porosity, microstructure and mechanical properties of laser additive manufacturing (LAM) porous ZK61 alloys. The surface morphology and porosity of the LAMed porous ZK61 alloys depend on the laser energy input. With increasing Zn contents, the surface quality of porous Mg-Zn-Zr alloys became worse, the grains are obviously refined and the precipitated phases experienced successive transitions: MgZn → MgZn + Mg7Zn3 → Mg7Zn3. The microhardness was improved significantly and ranged from 57.67 HV to 109.36 HV, which was ascribed to the fine grain strengthening, solid solution strengthening and precipitation strengthening. The LAMed porous Mg-15 wt.% Zn-0.3 wt.% Zr alloy exhibits the highest ultimate compressive strength (73.07 MPa) and elastic modulus (1.785 GPa). View Full-Text
Keywords: porous Mg-Zn-Zr alloy; laser additive manufacturing; surface morphology; microstructure; mechanical properties porous Mg-Zn-Zr alloy; laser additive manufacturing; surface morphology; microstructure; mechanical properties
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Zhang, M.; Chen, C.; Liu, C.; Wang, S. Study on Porous Mg-Zn-Zr ZK61 Alloys Produced by Laser Additive Manufacturing. Metals 2018, 8, 635.

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