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Distortion of laser welded titanium plates
Keiji Iwasaki1, Shoji Ohkawa, Iosif D Rosca
1Biomedical, Dental Materials and Engineering, Division of Oral Health Science, Course of Oral Medical Science, Graduate School of Dental Medicine, Hokkaido University, Kita 13 Nishi 7, Kita-ku, Sapporo, 060-8586, Japan. keiji-iwasaki@nifty.com
Dental Materials Journal
|February 4, 2005
Summary
Laser welding titanium plates causes distortion, which varies with welding side and parameters. Prewelding significantly reduces this distortion, with alternating two-side welding proving most effective.
Area of Science:
- Materials Science
- Manufacturing Engineering
- Welding Technology
Background:
- Laser welding is crucial for joining titanium alloys.
- Weld distortion is a significant challenge in laser welding, affecting structural integrity.
- Understanding distortion mechanisms is key to optimizing welding processes.
Purpose of the Study:
- To investigate the distortion of laser-welded titanium plates.
- To evaluate the influence of welding parameters and techniques on distortion.
- To identify methods for minimizing weld-induced distortion.
Main Methods:
- Utilized a Nd:YAG laser welding device to join titanium plates.
- Assessed distortion under various operating conditions and welding parameters.
- Compared one-side welding, two-side welding, and prewelding techniques.
Main Results:
- One-side welding showed stepwise distortion increases, while two-side welding exhibited distortion recovery.
- Welding current and spot diameter influenced distortion by affecting weld pool characteristics and shrinkage.
- Four-point prewelding substantially reduced final distortion for both one- and two-side welds.
- Alternating two-side welding of prewelded assemblies resulted in lower distortion than conventional two-side welding.
Conclusions:
- Welding strategy (one-side vs. two-side) significantly impacts titanium plate distortion.
- Prewelding is an effective technique for mitigating laser weld distortion.
- Optimized welding parameters and alternating two-side welding offer improved distortion control.