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http://dx.doi.org/10.3795/KSME-A.2016.40.12.1055

Weldability with Process Parameters During Fiber Laser Welding of a Titanium Plate (II) - The Effect of Control of Heat Input on Weldability -  

Kim, Jong Do (Division of Marine Engineering, Korea Maritime and Ocean Univ.)
Kim, Ji Sung (Graduate School, Korea Maritime and Ocean Univ.)
Publication Information
Transactions of the Korean Society of Mechanical Engineers A / v.40, no.12, 2016 , pp. 1055-1060 More about this Journal
Abstract
Laser welding is a high-density energy welding method. Hence, deep penetration and high welding speed can be realized with lower heat input as compared with conventional welding. The heat input of a CW laser welding is determined by laser power and welding speed. In this study, bead and lap welding of $0.5mm^t$ pure titanium was performed using a fiber laser. Its weldability with laser power and welding speed was evaluated. Penetration, bead width, joining length, and bead shape were investigated, and the mechanical properties were examined through tensile-shear strength tests. Welds with sound joining length were obtained when the laser power and welding speed were respectively 0.5 kW and 2.5 m/min, and 1.5 kW and 6 m/min, and the weld obtained at low output presented better ductility than that obtained at high output.
Keywords
Pure Titanium; Laser Welding; Fiber Laser; Heat Input; Laser Power; Welding Speed; Humping Bead;
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Times Cited By KSCI : 1  (Citation Analysis)
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