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.

References

［1］TIRYAKIOGLU M. Si particle size and aspect ratio distributions in an Al7% Si0.6% Mg alloy during solution treatment［J］. Material Science and Engineering ：A, 2008, 473 (1/2):1-6.
［2］马志锋, 陆政, 高文林, 等. 微量Mn元素对超高强铝合金锻件平面力学性能各向异性的影响［J］.材料导报, 2015, 29 (8): 94-97.
［3］田长文. AlTiCB中间合金对高铝锌基合金组织和性能的影响［J］. 山东科学, 2012, 25 (1): 51-55.
［4］LI X P, WANG X J, SAUNDERS M, et al. A selective laser melting and solution heat treatment refined Al12Si alloy with a controllable ultrafine eutectic microstructure and 25% tensile ductility［J］. Acta Materialia, 2015, 95: 74–82.
［5］OLAKANMI E O, COCHRANE R F, DALGARNO K W. A review on selective laser sintering/melting (SLS/SLM) of aluminium alloy powders: Processing, microstructure, and properties［J］. Progress in Materials Science, 2015, 74:401-477.
［6］韩志强, 李金玺, 杨文, 等. 铝合金挤压铸造过程微观孔洞形成的建模与仿真［J］. 金属学报, 2011, 47 (1): 7-16.
［7］SERCOMBE T B, SCHAFFER G B. Rapid manufacturing of aluminum components［J］. Science, 2003, 301(5637):1225–1227.
［8］WANG X J, ZHANG L C, FANG M H, et al. The effect of atmosphere on the structure and properties of a selective laser melted Al12Si alloy［J］. Material Science and Engineering A, 2014, 597:370–375.
［9］SERCOMBE T, JONES N, DAY R, et al. Heat treatment of Ti6Al7Nb components produced by selective laser melting［J］. Rapid Prototyping Journal, 2008, 14 (5): 300-304.
［10］KRUTH J P, MERCELIS P, van VAERENBERGH J, et al. Binding mechanisms in selective laser sintering and selective laser melting［J］. Rapid Prototyping Journal, 2005, 11 (1): 26-36.
［11］THIJS L, VERHAEGHE F, CRAEGHS T, et al. A study of the microstructural evolution during selective laser melting of Ti6Al4V［J］. Acta Materialia, 2010, 58(9): 3303-3312.
［12］ZHANG L C, KLEMM D, ECKERT J, et al. Manufacture by selective laser melting and mechanical behavior of a biomedical Ti24Nb4Zr8Sn alloy［J］. Scripta Materialia, 2011, 65(1): 21-24.
［13］XIN X Z, CHEN J, XIANG N, et al. Surface characteristics and corrosion properties of selective laser melted CoCr dental alloy after porcelain firing［J］. Dental Materials, 2014, 30 (3): 263-270.
［14］HEDBERG Y S, QIAN B, SHEN Z J, et al. In vitro biocompatibility of CoCrMo dental alloys fabricated by selective laser melting［J］. Dental Materials, 2014, 30(5):525-534.
［15］LI R D, LIU J H, SHI Y S, et al. 316L stainless steel with gradient porosity fabricated by selective laser melting［J］. Journal of Materials Engineering and Performance, 2010, 19 (5): 666-671.
［16］KRUTH J P, FROYEN L, van VAERENBERGH J , et al. Selective laser melting of ironbased powder［J］. Journal of Materials Processing Technology, 2004, 149 (1/2/3): 616-622.
［17］KEMPEN K, YASA E, THIJS L. Microstructure and mechanical properties of Selective Laser Melted 18Ni300 steel［J］. Physics Procedia, 2011, 12: 255-263.
［18］OLAKANMI E O, COCHRANE R F, DALGAMO K W. Densification mechanism and microstructural evolution inselective laser sintering of Al12Si powders［J］. Journal of Materials Processing Technology, 2011, 211 (1): 113-121.
［19］KEMPEN K, THIJS L, YASA E, et al. Process optimization and microstructural analysis for selective laser melting of AlSi10Mg［EB/OL］. ［2015-08-04］. Solid Freeform Fabrication Symposium, Texas, USA, 2011. https://www.researchgate.net/publication/262698754_Process_Optimization_and_Microstructural_Analysis_for_Selective_Laser_Melting_of_AlSi10Mg.
［20］赵官源, 王东东, 白培康, 等. 铝合金激光快速成型技术研究进展［J］. 热加工工艺, 2010, 39(9): 170-173.

Impact of powder characteristics on formation properties of selective laser melted

PDF (PC)

Like

Knowledge

Abstract

Cite this article

share this article

References

Related Articles 0

Metrics

Comments

Recommended 0