Baroutaji Ahmad, Arjunan Arun, Beal James, Robinson John, Coroado Julio
School of Engineering and Applied Science, Aston University, Aston Triangle, Birmingham B4 7ET, UK.
Additive Manufacturing of Functional Materials Research Group, Centre for Engineering Innovation and Research, University of Wolverhampton, Telford Innovation Campus, Telford TF2 9NT, UK.
Materials (Basel). 2023 Jan 2;16(1):430. doi: 10.3390/ma16010430.
Selective Laser Melting (SLM) is an emerging Additive Manufacturing (AM) technique for the on-demand fabrication of metal parts. The mechanical properties of Selectively Laser Melted (SLMed) parts are sensitive to oxygen concentration within the SLM build chamber due to the formation of oxides, which may lead to various negative consequences. As such, this work explores the influence of SLM atmospheric Oxygen Content (OC) on the macroscopic mechanical properties of SLMed AlSi10Mg bulk material and Triply Periodic Minimal Surface (TPMS) lattices namely primitive, gyroid, and diamond. Standard quasi-static tensile and crushing tests were conducted to evaluate the bulk properties of AlSi10Mg and the compressive metrics of TPMS-lattices. Two oxygen concentrations of 100 ppm and 1000 were used during the SLM fabrication of the experimental specimens. The tensile test data revealed a small influence of the oxygen content on the bulk properties. The low oxygen concentration improved the elongation while slightly reduced the ultimate tensile strength and yield stress. Similarly, the influence of the oxygen content on the compressive responses of TPMS-lattices was generally limited and primarily depended on their geometrical configuration. This study elucidates the role of SLM atmospheric oxygen content on the macroscopic behaviour of SLMed AlSi10Mg parts.
选择性激光熔化（SLM）是一种用于按需制造金属零件的新兴增材制造（AM）技术。由于氧化物的形成，选择性激光熔化（SLMed）零件的机械性能对SLM制造腔内的氧气浓度敏感，这可能会导致各种负面后果。因此，本工作探讨了SLM大气氧含量（OC）对SLMed AlSi10Mg块状材料和三重周期最小表面（TPMS）晶格（即原始晶格、类螺旋晶格和菱形晶格）宏观机械性能的影响。进行了标准的准静态拉伸和压缩试验，以评估AlSi10Mg的块状性能和TPMS晶格的压缩指标。在实验样品的SLM制造过程中使用了100 ppm和1000 ppm两种氧浓度。拉伸试验数据表明氧含量对块状性能的影响较小。低氧浓度提高了伸长率，同时略微降低了极限抗拉强度和屈服应力。同样，氧含量对TPMS晶格压缩响应的影响通常有限，主要取决于它们的几何构型。本研究阐明了SLM大气氧含量对SLMed AlSi10Mg零件宏观行为的作用。
