RESEARCH LABORATORIES

Design & Manufacturing

Laser-Based Manufacturing Laboratory
H. L. Tsai

Research Focus:

To conduct basic and applied research in laser welding, cutting, drilling, cladding, surface treating, marking, micromachining, rapid prototyping via direct metal deposition.

Ongoing Projects:

Keyhole Formation and Collapse

Laser­Material (Powder or Wire) Interaction

Fit-up Problems in Laser Welding

Aluminum Laser Welding

Micromachining

Rapid Prototyping via Direct Metal Deposition

Major Equipment:

A CO2 Laser System: 1700W (CAW), 7500W (Pulse), 4-Axis (24" x 24" x 10" and Rotary Table) Motion System, Frequency Range: 0 ~ 1 kHz, Spot Size < 0.2 mm, Fully PC Controlled Operations. Convergent Energy ARROW Ultimate Model.

A Nd:YAG Laser System: 75W (CAW), 125kW (Pulse), Low Divergence, TEM00 and Multimode, Q-Switched, Pulse Width: 1 to 1000 Ls, Spot Size < 1 Lm, Resolution < 0.2 Lm, Fully PC Controlled Galvo Operations. Lee Laser 818TQ-40 Model.

Weld Sample Preparation Facilities: Cutter, Mounting Press, Grinder/Polisher.

Weld Sample Testing Facilities: Microindenter, Stereo and Metallurgical Microscopes, Metallographic Imaging Analysis System, Laser Power and Energy Analyzer System, Gas Mixer, and several camera systems.

Sponsors:

U.S. Army Research Office

Manufacturing Research and Training Center

U.M. Research Board

Watlow Heater Technology Center

Research Team:

Principle Investigator and Contact: Professor Hai-Lung Tsai, phone: 573-341-4945, fax: 573-341-4115, e-mail: tsai@mst.edu