Study on Reduction of Internal Pores in Directed Energy Deposition Method

Abstract

Progress in additive manufacturing (AM) for metal materials is strongly demanded in aerospace and automobile industries because of its applicability to a low-waste and high-efficient production for complex-shape parts. However, AMs still have several challenges for practical usage such as void evolution inside of the produced object. This study clarifies deposition conditions capable of void suppression in Directed Energy Deposition which is one of the AM methods. Furthermore, a void reduction method is also proposed, which eliminates voids in the produced object by remelting treatment with laser beam.