Micro-scale gas tungsten arc welding on invar sheet

• Published in: Journal of the Korean Physical Society Vol. 85; no. 4; pp. 327 - 332
• Main Authors: Im, Jaeseung, Jeong, Jin Young, Choi, Soobong, Lee, Ki Hoon, Seo, Jeong-Hyun
• Format: Journal Article
• Language: English
• Published: Seoul The Korean Physical Society 01.08.2024; Springer Nature B.V; 한국물리학회
• Subjects: Arc spot welding; Electronic circuits; Ferrous alloys; Gas flow; Gas tungsten arc welding; Industrial applications; Low expansion alloys; Mathematical and Computational Physics; Microstructure; Original Paper - Condensed Matter; Particle and Nuclear Physics; Physics; Physics and Astronomy; Refilling; Theoretical; 물리학; Invar welding; Gas tungsten arc welding; Precision measurement; White-light interferometry; Metal structure
• ISSN: 0374-4884; 1976-8524
• DOI: 10.1007/s40042-024-01114-7

Manipulation of metal microstructures via welding technique has attracted many interests due to its various applications for microscopic electronic circuits and photo-electronic structures. Refilling deletion of structures is challenging in sculpting metal microstructure. We propose the micro-size gas tungsten arc welding (GTAW) technique to overcome these challenges. The welded area of ~ 10 s μm are achieved by using an etched 100 μm W wire with optimized arc current and voltage control. The spatial size and depth of the welded spot in the invar surface show dependency on the arc current and voltages under proper Ar gas flow. We believe that these results can provide technical intuition for developing many industrial applications.