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Veli Kujanpää

Researcher at Lappeenranta University of Technology

Publications -  64
Citations -  814

Veli Kujanpää is an academic researcher from Lappeenranta University of Technology. The author has contributed to research in topics: Welding & Laser beam welding. The author has an hindex of 15, co-authored 63 publications receiving 731 citations.

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Inert gas cutting of thick-section stainless steel and medium-section aluminum using a high power fiber laser

TL;DR: Inert gas assisted laser cutting of 10 mm stainless steel plate and 4 mm aluminum sheet was performed with a 5 kW fiber laser as discussed by the authors, and the effects of laser power, cutting speed, focal point position, and assist gas pressure on the cutting performance and cut quality were investigated.
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Characterization of the melt removal rate in laser cutting of thick-section stainless steel

TL;DR: In this article, the authors investigated the effects of process parameters on the depth of flow separation and the dross attachment on the lower cut edge on the 10 mm stainless steel AISI 304 laser cut edge.
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The effects of laser welding parameters on the microstructure of ferritic and duplex stainless steels welds

TL;DR: In this paper, microstructural changes occur in ferritic and duplex stainless steels when heat input is controlled by welding parameters, and they were identified and examined using optical metallographic methods.
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Diode laser beam absorption in laser transformation hardening of low alloy steel

TL;DR: In this article, the absorption of a diode laser beam to low alloy steel has been measured by a liquid calorimeter and the surface temperature was measured with a dual wavelength pyrometer.
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Effect of wire feed position on laser welding with filler wire

TL;DR: In this article, the effect of some of the most important welding variables to the quality and efficiency of laser welding when welding with filler wire was analyzed and the results showed that the weld width is more dependent on the heat input that on the original gap volume.