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Metals 2017, 7(6), 221; doi:10.3390/met7060221

Robotic Nd:YAG Fiber Laser Welding of Ti-6Al-4V Alloy

1
Faculty of Natural Sciences and Engineering, Department of Mechanical Engineering, Gaziosmanpaşa University, Tokat 60150, Turkey
2
Graduate School of Natural and Applied Sciences, Department of Mechatronics Engineering, Gaziosmanpaşa University, Tokat 60150, Turkey
*
Author to whom correspondence should be addressed.
Received: 10 April 2017 / Revised: 6 June 2017 / Accepted: 13 June 2017 / Published: 15 June 2017
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Abstract

In the present study, Ti6Al4V titanium alloy plates were joined using a robotic fiber laser welding method. The laser welding process was carried out at two different welding speeds. Effects of different heat input conditions on the microstructure and mechanical properties of robotic fiber laser welded joints were investigated. Some grain coarsening was observed in the microstructure of weld metal in samples joined using high heat input, compared to those using low heat input, and volume rates of primary α structures increased in the weld metal. The microstructure of weld metal in samples joined using low heat input was made of basket-weave or acicular α' grains and primary β grains in grain boundaries. Tensile and yield strength of samples joined using low heat input were higher than for those joined using high heat input, but their ductility was lower. View Full-Text
Keywords: titanium alloy; fiber laser welding; microstructure; mechanical properties titanium alloy; fiber laser welding; microstructure; mechanical properties
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Köse, C.; Karaca, E. Robotic Nd:YAG Fiber Laser Welding of Ti-6Al-4V Alloy. Metals 2017, 7, 221.

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