Lubkowitz Victor, Alber Jonas, Zanger Frederik
wbk Institute of Production Science, Karlsruhe Institute of Technology (KIT), Kaiserstraße 12, 76131 Karlsruhe, Germany.
Materials (Basel). 2021 Nov 5;14(21):6665. doi: 10.3390/ma14216665.
In powder bed fusion with laser beam (PBF-LB), two process-induced defects by pore formation are known: local spherical pores by the keyhole effect and geometrically undefined pores caused by lack of fusion. Both pore types are heterogeneously distributed and can be used for lightweight or damping design applications. The achievable porosity is limited to around 13%. This article presents a novel process-controlled method enabling the targeted and reproducible manufacturing of solid parts with regularly distributed cavities, currently up to 60% porosity in AlSi10Mg, using the balling effect. This eliminates the need for time-consuming digital pre-processing work.
在激光束粉末床熔融（PBF-LB）中，已知由孔隙形成导致的两种工艺诱导缺陷：由匙孔效应产生的局部球形孔隙以及由熔合不足引起的几何形状不明确的孔隙。这两种孔隙类型分布不均匀，可用于轻量化或阻尼设计应用。可实现的孔隙率限制在13%左右。本文提出了一种新颖的工艺控制方法，利用球化效应能够有针对性地、可重复地制造具有规则分布孔洞的实心零件，目前在AlSi10Mg合金中孔隙率可达60%。这消除了耗时的数字预处理工作的需求。
