Effects of processing parameters on properties of selective laser melting Mg-9%Al powder mixture

被引：223

作者：

Zhang, Baicheng ^{[1
]}

Liao, Hanlin ^{[1
]}

Coddet, Christian ^{[1
]}

机构：

[1] Univ Technol Belfort Montbeliard, LERMPS, F-90010 Belfort, France

来源：

MATERIALS & DESIGN | 2012年 / 34卷

关键词：

Lasers; Mechanical; Microstructure; MICROSTRUCTURE; DENSIFICATION;

D O I：

10.1016/j.matdes.2011.06.061

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In the present study, selective laser melting (SLM) was used to sinter a powder mixture of Mg-9%Al. Both densification mechanism and microstructure evolution of laser sintered powder mixture were established. The effect of laser processing parameter on Mg-9%Al powder using SLM was also investigated. It can be found that a maximum relative density was 82% with preferable process parameters of v = 0.02 m/s, P = 15 W. An overlapped structure can be obtained when decreasing the laser energy density due to an incomplete melt. On the other hand, a severe particulate agglomeration appeared as the increase of the laser energy due to a balling effect. A critical scanning speed of 0.02 m/s can ensure that the particulates were well melted and not evaporated during the experiment. Moreover, the Mg and Al elements were dispersed uniformly in the samples. The microstructure and composition phase were studied through scanning electron microscopy (SEM) and X-ray elemental mapping (XRD) respectively. (C) 2011 Elsevier Ltd. All rights reserved.

引用

页码：753 / 758

页数：6

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