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http://dx.doi.org/10.5916/jkosme.2008.32.2.315

Lab Weldability of Pure Titanium by Nd:YAG Laser  

Kim, Jong-Do (한국해양대학교 기관시스템공학부)
Kwak, Myung-Sub (한국해양대학교 대학원)
Publication Information
Journal of Advanced Marine Engineering and Technology / v.32, no.2, 2008 , pp. 315-322 More about this Journal
Abstract
Titanium and its alloys have excellent corrosion resistance, high strength to weight ratios and creep properties in high temperature, which make them using many various fields of application. Especially, pure titanium, which has outstanding resistance for the stress corrosion cracking, crevice corrosion, pitting and microbiologically influenced corrosion, brings out to the best material for the heat exchanger, ballast tank, desalination facilities, and so on. Responding to these needs, welding processes for titanium are also being used GTAW, GMAW, PAW, EBW, LBW, resistance welding and diffusion bonding, etc. However, titanium is very active and highly susceptible to embrittlement by oxygen, nitrogen, hydrogen and carbon at high temperature, so it needs to shield the weld metal from the air and these gases during welding by non-active gas. In this study, it was possible to get sound beads without humping and spatter with a decrease of peak power according to increase of pulse width, change of welding speed and overlap rate for heat input control, and shield conditions at pulsed laser welding of titanium plates for Lap welding.
Keywords
Pure titanium; Laser welding; Pulse width; Heat input control; Overlap rate;
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