高能球磨对Mg-Zn-Zr合金微观组织与力学性能的影响<sup>*</sup>

doi:10.11896/j.issn.1005-023X.2017.018.016

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Abstract High-energy milling of Mg alloy powder was conducted in argon atmosphere, and then the cold-pressing, hot-pressing sintering and hot extrusion of the milled powder was performed. The microstructure and mechanical properties of the as-extruded samples at different ball milling conditions was studied. The results indicated that with the increasing milling time, the particle size was refined to 8 μm, and grain size was about 34 nm, oxidation of the powders still occurred during the process, nano-MgO particles were also produced. Precipitated phase (MgZn₂) existed in the extruded alloys, and uniformly distributed in the Mg matrix. With refined particles, the material performance was significantly improved, when the milling time was up to 10 h, the ultimate tensile strength and compress yield strength of the as-extruded samples were 365 MPa and 325 MPa, respectively, the ultimate compression strength kept in 466 MPa. When the milling time was 25 h, the average particle size of the powders was about 8 μm, accompanied with increased surface energy and thickened oxide film of the particles, which resulted in the bad combination between particles and opposite effect on the mechanical properties of the material.

Key words： magnesium alloy powder high-energy milling hot pressed sintering nano-MgO particles

Published: 08 May 2018

CLC number:

TB31

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	Articles by authors
	LI Xiaoqiang
	LI Shangpeng
	DING Yanlin
	MA Guojun
	JIN Peipeng

Cite this article:

LI Xiaoqiang,LI Shangpeng,DING Yanlin, et al. Effect of High Energy Milling on the Microstructure and Mechanical Properties of Mg-Zn-Zr Alloy[J]. Materials Reports, 2017, 31(18): 77-80.

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http://www.mater-rep.com/EN/10.11896/j.issn.1005-023X.2017.018.016 OR http://www.mater-rep.com/EN/Y2017/V31/I18/77

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