粉体特征对选区激光熔化Al-Si合金成型性能的影响

doi:10.3976/j.issn.1002-4026.2016.02.007

Abstract

Abstract:

With four different Al-Si alloys Al-12Si, Al-10SiMg, Al-7SiMg and Al-5Si as subjects, we characterized their physical properties of particle morphology, particle size distribution and fluidity. We conducted selective laser melting (SLM) formation experiment and acquired optimized SLM technology parameters. We also analyzed density, microstructure and fracture surface of formed samples. We further investigated the impact of such powder characteristics as particle size, morphology, and distribution on SLM formation properties. Results show that particle morphology, size distribution, flow ability of Al-Si powders will highly affect the SLM formation properties. The better sphericity and fluidity of Al-Si powders are, the less their particle size distribution scope is. The higher the density of SLM formed samples is, the less the defect in their microstructures is. Their formation property is therefore better.

Key words: powder characteristics, Al-Si alloy, selective laser melting, formation property

CLC Number:

TG456.7

WANG Xiaojun, WANG Xiuchun,YI Xibin, ZHANG Jing. Impact of powder characteristics on formation properties of selective laser melted[J].SHANDONG SCIENCE, 2016, 29(2): 30-35.

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Impact of powder characteristics on formation properties of selective laser melted

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