Metal powder bed fusion in additive manufacturing is gaining interest as a manufacturing technique for complex metal parts in the aerospace, rail, and automotive industries. This has led to an emergence of 3D printers in the market to accelerate the diffusion of this technology as an industrial manufacturing technique. The Aeroswift is an additive manufacturing machine developed with the purpose of using high laser powers for high-speed production of structurally dense parts at accelerated consolidation rates. The work in this paper focuses on the 3D printing of Ti-6Al-4V tensile specimens with the aim of determining the effect of fast cooling rate and porosity on the ductility of the specimen. The mechanical properties of the parts depend on the energy input; in order to obtain optimum melting of powder and desirable properties, an exponential decay relationship was observed where, as porosity increased, the elongation dropped. The level of porosity at low energy density is attributed to lack of fusion from low heat input, while high energy inputs showed low porosity.

增材制造中的金属粉末床融合作为航空航天、铁路和汽车工业中复杂金属零件的制造技术越来越受到关注。这导致市场上出现了 3D 打印机，以加速该技术作为工业制造技术的传播。Aeroswift 是一种增材制造机器，其开发目的是使用高激光功率以加速的固结率高速生产结构密集的零件。本文的工作重点是 Ti-6Al-4V 拉伸试样的 3D 打印，目的是确定快速冷却速率和孔隙率对试样延展性的影响。零件的机械性能取决于能量输入；为了获得最佳的粉末熔化和所需的性能，观察到指数衰减关系，随着孔隙率的增加，伸长率下降。低能量密度下的孔隙率水平归因于低热输入缺乏聚变，而高能量输入显示低孔隙率。