Influence of Powder Characteristics on Processability of AlSi12 Alloy Fabricated by Selective Laser Melting

被引：109

作者：

Baitimerov, Rustam ^{[1
]}

Lykov, Pavel ^{[1
]}

Zherebtsov, Dmitry ^{[2
,3
]}

Radionova, Ludmila ^{[3
]}

Shultc, Alexey ^{[1
]}

Prashanth, Konda Gokuldoss ^{[4
,5
,6
]}

机构：

[1] SUSU, Micropowders Technol Lab, Res & Educ Ctr Aerosp Technol, Lenin Ave 76, Chelyabinsk 454080, Russia

[2] SUSU, Res & Educ Ctr Nanotechnol, Lenin Ave 76, Chelyabinsk 454080, Russia

[3] SUSU, Fac Mat Sci & Met Technol, Polytech Inst, Lenin Ave 76, Chelyabinsk 454080, Russia

[4] Norwegian Univ Sci & Technol, Dept Mfg & Civil Engn, Teknol Vegen 22, N-2815 Gjovik, Norway

[5] Austrian Acad Sci, Erich Schmid Inst Mat Sci, Jahnstr 12, A-8700 Leoben, Austria

[6] Tallinn Univ Technol, Dept Mech & Ind Engn, Ehitajate Tee 5, EE-19086 Tallinn, Estonia

来源：

MATERIALS | 2018年 / 11卷 / 05期

关键词：

additive manufacturing; selective laser melting (SLM); AlSi12; alloy; powder; porosity; MECHANICAL-PROPERTIES; DENSIFICATION BEHAVIOR; AL-12SI ALLOY; TENSILE PROPERTIES; MICROSTRUCTURE; DENSITY; STRENGTH; SLM; TI;

D O I：

10.3390/ma11050742

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Selective laser melting (SLM) is one of the additive manufacturing technologies that allows for the production of parts with complex shapes from either powder feedstock or from wires. Aluminum alloys have a great potential for use in SLM especially in automotive and aerospace fields. This paper studies the influence of starting powder characteristics on the processability of SLM fabricated AlSi12 alloy. Three different batches of gas atomized powders from different manufacturers were processed by SLM. The powders differ in particle size and its distribution, morphology and chemical composition. Cubic specimens (10 mm x 10 mm x 10 mm) were fabricated by SLM from the three different powder batches using optimized process parameters. The fabrication conditions were kept similar for the three powder batches. The influence of powder characteristics on porosity and microstructure of the obtained specimens were studied in detail. The SLM samples produced from the three different powder batches do not show any significant variations in their structural aspects. However, the microstructural aspects differ and the amount of porosity in these three specimens vary significantly. It shows that both the flowability of the powder and the apparent density have an influential role on the processability of AlSi12 SLM samples.

引用

页数：14

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