Smoke Suppression in Electron Beam Melting of Inconel 718 Alloy Powder Based on Insulator–Metal Transition of Surface Oxide Film by Mechanical Stimulation

• Published in: Materials Vol. 14; no. 16; p. 4662
• Main Authors: Chiba, Akihiko, Daino, Yohei, Aoyagi, Kenta, Yamanaka, Kenta
• Format: Journal Article
• Language: English
• Published: Basel MDPI AG 18.08.2021; MDPI
• Subjects: Additive manufacturing; Alloy powders; Ball milling; Chemical composition; Direct current; Electrical properties; Electron beam melting; Electron irradiation; Heating; High temperature; Lattice strain; Nickel; Nickel base alloys; Optimization; Oxide coatings; Particle size; Photoelectrons; Powder beds; R&D; Research & development; Residual stress; Room temperature; Scanning electron microscopy; Smoking; Spectrum analysis; Stimulation; Superalloys; Temperature; Titanium alloys; United States > US

In powder bed fusion–electron beam melting, the alloy powder can scatter under electron beam irradiation. When this phenomenon—known as smoking—occurs, it makes the PBF-EBM process almost impossible. Therefore, avoiding smoking in EBM is an important research issue. In this study, we aimed to clarif...