Influence of the temperature–time regime on the mechanical properties during the DED-Arc process of near-net-shape Ti-6Al-4 V components

• Published in: Welding in the world Vol. 67; no. 7; pp. 1643 - 1665
• Main Authors: Gierth, Maximilian, Michael, Nils, Henckell, Philipp, Reimann, Jan, Hildebrand, Jörg, Bergmann, Jean Pierre
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 01.07.2023; Springer Nature B.V
• Subjects: Accumulation; Additive manufacturing; Additive Manufacturing Processes and Performance; Arc deposition; Chemistry and Materials Science; Economic analysis; Gas metal arc welding; Gas welding; Inert gas welding; Investigations; Manufacturing; Materials Science; Mechanical properties; Metallic Materials; Metallurgy; Near net shaping; Rare gases; Research Paper; Research projects; Short circuits; Solid Mechanics; Temperature; Theoretical and Applied Mechanics; Titanium; Vanadium; Mechanical properties; DED-Arc; Ti-6Al-4 V; GMAW; Temperature–time regime
• ISSN: 0043-2288; 1878-6669
• DOI: 10.1007/s40194-023-01513-7

In a research project, the additive manufacturing process of components made of Ti-6Al-4 V using gas metal arc welding (GMAW), which is classified into the directed energy deposition–arc (DED-Arc) processes, was investigated. The project focused on the systematic development of economical additive build-up strategies and the analysis of the temperature–time regime during the build-up process, as well as the investigation of the resulting properties. A welding range diagram was created with recommendations for process settings for additive manufacturing with the controlled short circuit, as well as a presentation of possible defect patterns outside the range shown. For the fabrication of thick-walled structures, various build-up strategies were investigated by modifying the welding path and evaluated with regard to their suitability. Based on the results, additive structures were fabricated by varying the temperature–time regime in order to gain insights into selected geometrical, metallurgical, and mechanical properties. Different energy inputs per unit length, structure dimensions, and interpass temperatures (IPT) were used for this purpose. The research project provides comprehensive findings on the additive processing of the material Ti-6Al-4 V using metal inert gas welding, in particular with regard to the temperature–time regime and the resulting properties.