Influence of Powder Characteristics on Processability of AlSi12 Alloy Fabricated by Selective Laser Melting.
Influence of Powder Characteristics on Processability of AlSi12 Alloy Fabricated by Selective Laser Melting.
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DOI：
10.3390/ma11050742
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发表时间：
2018-05-07
期刊：
影响因子：
--
通讯作者：
Prashanth KG
中科院分区：
文献类型：
--
作者：
Baitimerov R;Lykov P;Zherebtsov D;Radionova L;Shultc A;Prashanth KG
选择性激光熔化（SLM）是增材制造技术之一，允许从粉末原料或线材生产具有复杂形状的零件。铝合金在SLM中具有巨大的应用潜力，特别是在汽车和航空航天领域。研究了原料粉末特性对SLM制备AlSi 12合金加工性能的影响。通过SLM加工来自不同制造商的三个不同批次的气体雾化粉末。粉末的粒度及其分布、形态和化学组成不同。采用SLM技术，采用优化的工艺参数，从3种不同的粉末批次中制备了10 mm × 10 mm × 10 mm的立方体试样。对于三个粉末批次，制造条件保持相似。详细研究了粉末特性对所制备试样的孔隙率和显微组织的影响。由三种不同粉末批次生产的SLM样品在其结构方面没有显示出任何显著变化。然而，微观结构方面的差异，在这三个标本中的孔隙度的量变化显着。结果表明，粉末的流动性和松装密度对AlSi 12 SLM试样的加工性能均有影响。
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 × 10 mm × 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.
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