Freeform fabrication of titanium metal by 3D micro welding

A novel freeform fabrication method named 3D micro welding (3DMW) has been developed. It is a combined process of the freeform fabrication method with TIG (tungsten inert gas) welding. The titanium micro beads were investigated with respect to the diameter, height, and contact angle to the titanium...

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Bibliographic Details
Published in:Materials science & engineering. A, Structural materials : properties, microstructure and processing Structural materials : properties, microstructure and processing, 2005-08, Vol.402 (1), p.84-91
Main Authors: Terakubo, M., Oh, Janghwan, Kirihara, S., Miyamoto, Y., Matsuura, K., Kudoh, M.
Format: Article
Language:English
Subjects:
3D micro welding
3D objects
Applied sciences
Exact sciences and technology
Free form fabrication
Joining, thermal cutting: metallurgical aspects
Metals. Metallurgy
Powder metallurgy. Composite materials
Production techniques
Technology
Titanium
Welding
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Summary:A novel freeform fabrication method named 3D micro welding (3DMW) has been developed. It is a combined process of the freeform fabrication method with TIG (tungsten inert gas) welding. The titanium micro beads were investigated with respect to the diameter, height, and contact angle to the titanium substrate as functions of arc discharge current and two different shielding gases. The Ar-4% H 2 gas was more effective in preventing oxidization of beads than Ar gas. Simple 3D titanium objects with arch, arabic numerals and pyramidal shapes were formed. Fine needle-like solidification structure of α-phase titanium were developed during bead formation due to the rapid cooling of the melt. The interfaces between a titanium bead and titanium substrate were jointed well without cracks or pores.
ISSN:0921-5093
1873-4936
DOI:10.1016/j.msea.2005.04.025