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Laser Impulse Processing of Relatively Thick Bodies

College
College of Engineering (COE)
Researchers
Daehn, Glenn
Vivek, Anupam
Licensing Manager
Wohlgamuth, Christopher
(614)-247-8331
wohlgamuth.5@osu.edu

TS-038602 — Apparatus and methods to use optical energy to produce impulses capable of processing thick bodies.

Conventional forming technologies often struggle to process certain aluminum alloys, titanium alloys, steels, and magnesium wrought alloys. Also, conventional forming technologies often cause wrinkling and springback effects. Due to the high strain rates of impulse processing technologies compared…

The Need

Conventional forming technologies often struggle to process certain aluminum alloys, titanium alloys, steels, and magnesium wrought alloys. Also, conventional forming technologies often cause wrinkling and springback effects. Due to the high strain rates of impulse processing technologies compared to conventional forming technologies, impulse processing increases formability of certain aluminum alloys, titanium alloys, steels, and magnesium wrought alloys. Impulse processing also typically reduces wrinkling and springback effects while exploiting forming heat more efficiently than quasistatic forming operations. Various methods, such as explosives, electromagnetic interactions, vaporizing foil actuators, and mechanical impact, can be used to perform impulse processing operations, such as metal forming, joining, welding, shearing, etc. However, these current state-of-the-art impulse processing operations are typically limited to thin materials (on the order of a few hundred micrometers).

The Technology

Researchers at The Ohio State University, led by Dr. Glenn Daehn, have developed laser impulse processing apparatus and methods to use optical energy supplied by a pulsed laser beam to process materials, which may exceed 1mm in thickness. The pulsed laser beam fires through a transparent backing and ablates a small volume of the workpiece surface, resulting in large pressures which can be used to process the materials. The laser impulse processing apparatus and methods are capable of performing processing operations such as metal forming, joining, welding, shearing, etc.

Commercial Applications

  • Shock hardening and phase changes
  • Impact welding
  • Cutting
  • Forming
  • Embossing
  • Joining by forming
  • Incremental forming
  • Athermal stress relief and springback removal

Benefits/Advantages

  • Achieve efficiency of up to 40% conversion from optical energy to kinetic energy
  • Process relatively thick materials
  • Reduce wrinkling and springback effects
  • Perform variety of processing operations