Selective laser melting of Inconel 718 under high laser power. (2020)

• Record Type: Journal Article
• Authors: Borisov, E.V.; Popovich, V.A.; Popovich, A.A.; Sufiiarov, V.Sh.; Zhu, Jia-Ning; Starikov, K.A.
• Is Part Of: Materials today. Volume 30:Part 3(2020)
• Page Start: 784
• Page End: 788
• Publication Date: 2020
• Subjects: Additive manufacturing -- Selective laser melting -- Nickel alloy -- Grain structure -- Texture; Materials science -- Congresses -- Periodicals; 620.1
• DOI: 10.1016/j.matpr.2020.01.571
• Languages: English
• ISSNs: 2214-7853

Abstract

Abstract: Selective laser melting (SLM) process has been lately extensively applied in manufacturing of Nickel-based super alloys, which compared to conventional manufacturing routes offers increased design flexibility and simplification of the manufacturing process. However, in order to make SLM process even more beneficial, its process time has to be reduced. One of the ways to tackle this problem is by tailoring process parameters through application of high laser power and base plate pre-heating. In this paper, a comparative study of optimum SLM fabrication conditions of Inconel 718 superalloy under high laser power and with and without plate pre-heating was conducted. Furthermore, the effect of layer thickness on melt pool characteristics, porosity and hardness were investigated to determine how laser power and pre-heating affect microstructure development.