Gas Metal Arc Welding Modes in Wire Arc Additive Manufacturing of Ti-6Al-4V
| Autor: | Dmitry Kurushkin, Anton Naumov, Margarita Surenkova, Oleg Panchenko, Ivan Kladov, Fedor Isupov |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
0209 industrial biotechnology
Heat-affected zone Technology Materials science microstructure 02 engineering and technology wire arc additive manufacturing Article Gas metal arc welding law.invention 020901 industrial engineering & automation law gas metal arc welding General Materials Science Ti-6Al-4V Composite material Microscopy QC120-168.85 QH201-278.5 021001 nanoscience & nanotechnology Microstructure Engineering (General). Civil engineering (General) Cathode Anode TK1-9971 waveforms Descriptive and experimental mechanics Electrode Grain boundary Electrical engineering. Electronics. Nuclear engineering metal transfer modes TA1-2040 0210 nano-technology Short circuit |
| Zdroj: | Materials, Vol 14, Iss 2457, p 2457 (2021) Materials Volume 14 Issue 9 |
| ISSN: | 1996-1944 |
| Popis: | In wire arc additive manufacturing of Ti-alloy parts (Ti-WAAM) gas metal arc welding (GMAW) can be applied for complex parts printing. However, due to the specific properties of Ti, GMAW of Ti-alloys is complicated. In this work, three different types of metal transfer modes during Ti-WAAM were investigated: Cold Metal Transfer, controlled short circuiting metal transfer, and self-regulated metal transfer at a direct current with a negative electrode. Metal transfer modes were studied using captured waveform and high-speed video analysis. Using these modes, three walls were manufactured the geometry preservation stability was estimated and compared using effective wall width calculation, the microstructure was analyzed using optical microscopy. Transfer process data showed that arc wandering depends not only on cathode spot instabilities, but also on anode processing properties. Microstructure analysis showed that each produced wall consists of phases and structures inherent for Ti-WAAM. α-basketweave in the center of and α-colony on the grain boundary of epitaxially grown β-grains were found with heat affected zone bands along the height of the walls, so that the microstructure did not depend on metal transfer dramatically. However, the geometry preservation stability was higher in the wall, produced with controlled short circuiting metal transfer. |
| Databáze: | OpenAIRE |
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