Preprint Article Version 1 This version is not peer-reviewed

Study of the Influence of Shielding Gases on Laser Metal Deposition of Inconel 718 Superalloy

Version 1 : Received: 28 June 2018 / Approved: 29 June 2018 / Online: 29 June 2018 (15:44:04 CEST)

A peer-reviewed article of this Preprint also exists.

Ruiz, J.E.; Cortina, M.; Arrizubieta, J.I.; Lamikiz, A. Study of the Influence of Shielding Gases on Laser Metal Deposition of Inconel 718 Superalloy. Materials 2018, 11, 1388. Ruiz, J.E.; Cortina, M.; Arrizubieta, J.I.; Lamikiz, A. Study of the Influence of Shielding Gases on Laser Metal Deposition of Inconel 718 Superalloy. Materials 2018, 11, 1388.

Journal reference: Materials 2018, 11, 1388
DOI: 10.3390/ma11081388

Abstract

The use of the LMD technology as a manufacturing and repairing technique in industrial sectors like the die and mold and aerospace is increasing within the last decades. Research carried out in the field of LMD process situates argon as the most usual inert gas, followed by nitrogen. Some leading companies have started to use helium and argon as carrier and shielding gas, respectively. There is therefore a pressing need to know how the use of different gases may affect the LMD process due to there is a lack of knowledge with regard to gas mixtures. The aim of the present work is to evaluate the influence of a mixture of argon and helium on the LMD process by analyzing single tracks of deposited material. For this purpose, special attention is paid to the melt pool temperature, as well as to the characterization of the deposited clads. The increment of helium concentration in the gases of the LMD processes based on argon will have three effects. The first one is a slightly reduction of the height of the clads. Second, an increase of the temperature of the melt pool. Last, smaller wet angles are obtained for higher helium concentrations.

Subject Areas

LMD; laser metal deposition; shielding gas; Argon; Helium; additive manufacturing; Inconel 718; melt pool temperature

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