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Joint strength of laser-welded titanium
1Department of Fixed Prosthodontics, School of Dentistry, Nagasaki University, 1-7-1 Sakamoto, Nagasaki 852-8588, Japan.
Summary
Titanium laser welding achieved joint strengths comparable to the base metal. Optimal laser energy levels and parameters were identified for effective titanium joining.
Area of Science:
- Materials Science
- Manufacturing Engineering
- Metallurgy
Background:
- Laser welding is a critical joining technology for titanium alloys.
- Optimizing laser welding parameters is essential for achieving desired mechanical properties.
- Understanding the relationship between laser energy and joint strength is crucial for industrial applications.
Purpose of the Study:
- To evaluate the joint strength of laser-welded titanium.
- To determine the effect of varying laser output energy (current) on weld quality.
- To identify optimal welding conditions for titanium.
Main Methods:
- Cast titanium plates of 0.5 mm and 1.0 mm thickness were laser-welded using a Nd: YAG laser.
- Welding parameters, including output energy (180-300A), pulse duration (10 ms), and spot diameter (1.0 mm), were systematically varied.
- Tensile testing was performed to measure the breaking force of welded and non-welded specimens.
Main Results:
- For 0.5 mm thick titanium, laser welding at 240-300A resulted in strengths statistically similar to non-welded controls.
- For 1.0 mm thick titanium, laser welding at 270-300A yielded strengths comparable to non-welded specimens.
- Appropriate laser welding conditions were identified based on penetration depth and specimen thickness.
Conclusions:
- Laser welding can achieve joint strengths equivalent to the parent titanium metal under optimized conditions.
- The study provides valuable data for setting laser welding parameters for titanium.
- Effective laser welding of titanium is feasible with precise control over energy output and other parameters.