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In Vitro Evaluation of The Effects Of Er,Cr:YSGG and Diode Lasers Used on Titanium Cylinder
Published on: June 6, 2025
613
Study of Gravity Effects on Titanium Laser Welding in the Vertical Position
Baohua Chang1, Zhang Yuan2, Haitao Pu3
1State Key Laboratory of Tribology, Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China. bhchang@tsinghua.edu.cn.
Materials (Basel, Switzerland)
|September 9, 2017
Summary
Achieving quality laser welds in titanium alloys requires careful parameter control. Lower heat input improves weld appearance and reduces porosity in vertical welding positions.
Area of Science:
- Materials Science
- Manufacturing Engineering
- Welding Technology
Background:
- Positional laser beam welding of titanium alloys presents challenges in achieving satisfactory weld quality.
- Understanding the influence of process parameters on weld quality across different welding positions is crucial.
Purpose of the Study:
- To evaluate the effect of vertical up and vertical down welding positions on the quality of laser-welded Ti6Al4V titanium alloy joints.
- To determine the impact of heat input on weld appearance, porosity, strength, and ductility.
Main Methods:
- Laser beam welding of Ti6Al4V titanium alloy sheets in vertical up and vertical down positions.
- Evaluation of weld appearance, porosity content, tensile strength, and ductility.
- Analysis of the influence of heat input (varied by laser power and welding speed) on weld quality.
Main Results:
- Vertical up welds exhibited greater undercuts, while vertical down welds showed significantly higher porosity.
- Higher heat input led to poor weld profiles (undercuts, burn-through) in vertical up and excessive porosity in vertical down positions.
- Lower heat input improved weld appearance and reduced porosity, enhancing overall weld quality.
Conclusions:
- Both undercut and porosity negatively impact the tensile properties of laser-welded joints.
- Optimizing laser welding parameters for vertical positions involves using settings that result in lower heat inputs.
- Employing higher laser powers and welding speeds is recommended for achieving superior weld quality in vertical laser welding of Ti6Al4V.
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