A Novel Framework of Developing a Predictive Model for Powder Bed Fusion Process.

The powder bed fusion (PBF) process is a metal additive manufacturing process, which can build parts with any complexity from a wide range of metallic materials. PBF process research has predominantly focused on the impact of only a few parameters on product properties due to the lack of a systematic approach for predictive modeling of a large set of process parameters simultaneously. The pivotal challenges regarding this process require a quantitative approach for mapping the material properties and process parameters onto the ultimate quality; this will then enable the optimization of those parameters.

Effect of high-power ultrasonic vibration on the flexible bending process of thin-walled circular tubes: Numerical and experimental research.

Thin-walled bent tubes are a significant component utilized in the aerospace, shipbuilding, and chemical industries, as well as considering that they are employed as fluid and gas transporters, the quality of their manufacturing and production is critical. In recent years, new technologies for the manufacture of these structures have been developed, the most promising of which is the flexible bending process. Nevertheless, during tube bending, defects like an increase in contact stress and friction force in the bending area, thinning of the bent tube in the extrados zone, ovalization, and spring-back are some of the issues that arise.

Observation on the behavior of ultrasonic micro-hammer and its effects on the deep drawing process: Numerical simulation and experimental study.

Combining ultrasonic vibration (UV) with metal forming processes is investigated as a novel technology that has been able to reduce the forming force and enhance this process. This paper attempts to elucidate the effect of Ultrasonically Assisted Deep Drawing (UADD) process on the forming force and thickness distribution of the formed sample. Therefore, a Finite Element (FE) model is developed to simulate this process and further investigate the ultrasonic micro-hammer mechanism in UADD process.