期刊
OPTICS AND LASER TECHNOLOGY
卷 96, 期 -, 页码 88-96出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.optlastec.2017.05.006
关键词
Laser energy density; Selective laser melting; Densification behavior; Surface roughness
资金
- National Natural Science Foundation of China (NSFC, China) [51405467]
- Chongqing Research of Application Foundation and Advanced Technology [cstc2016jcyj A0061]
- Chinese Academy of Sciences [KGZD-EW-T0]
Effects of laser energy density (LED) on densities and surface roughness of AlSi10Mg samples processed by selective laser melting were studied. The densification behaviors of the SLM manufactured AlSi10Mg samples at different LEDs were characterized by a solid densitometer, an industrial X-ray and CT detection system. A field emission scanning electron microscope, an automatic optical measuring system, and a surface profiler were used for measurements of surface roughness. The results show that relatively high density can be obtained with the point distance of 80-105 mu m and the exposure time of 140-160 mu s. The LED has an important influence on the surface morphology of the forming part, too high LED may lead to balling effect, while too low LED tends to produce defects, such as porosity and microcrack, and then affect surface roughness and porosities of the parts finally. (C) 2017 Elsevier Ltd. All rights reserved.
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