Goal driven optimization of process parameters for maximum efficiency in laser bending of advanced high strength steels

Laser forming or bending is fast becoming an attractive option for the forming of advanced high strength steels (AHSS), due primarily to the reduced formability of AHSS when compared with conventional steels in traditional contact-based forming processes. An inherently iterative process, laser forming must be optimized for efficiency in order to compete with contact based forming processes; as such, a robust and accurate method of optimal process parameter prediction is required. In this paper, goal driven optimization is conducted, utilizing numerical simulations as the basis for the prediction of optimal process parameters for the laser bending of DP 1000 steel. A key consideration of the optimization process is the requirement for minimal microstructural transformation in automotive grade high strength steels such as DP 1000

Research needs for commercialization of food biotechnology in developing countries

Presented at the UNIDO Expert Consultation on Commercialization of Biotechnology, Vienna, Austria, 199

Applied research methodology

Meeting: IDRC Research Management Symposium, 4-6 Oct. 1982, Ottawa, ON, C

Investigación para mejorar la pequeña industria alimenticia en países en vía de desarrollo : proyectos apoyados por el CIID

Reunión: Seminario Latinoamericano de Ciencia y Tecnología de Alimentos, 13-16 oct. 1985, Viña del Mar, C

Energy and post-production systems : the IDRC program

Meeting: Seminar on Energy Conservation in Food Processing Industries, 26 May 1982, Ottawa, ON, C

Ultrafast laser parallel microdrilling using multiple annular beams generated by a spatial light modulator

Ultrafast laser parallel microdrilling using diffractive multiple annular beam patterns is demonstrated in this paper. The annular beam was generated by diffractive axicon computer generated holograms (CGHs) using a spatial light modulator. The diameter of the annular beam can be easily adjusted by varying the radius of the smallest ring in the axicon. Multiple annular beams with arbitrary arrangement and multiple annular beam arrays were generated by superimposing an axicon CGH onto a grating and lenses algorithm calculated multi-beam CGH and a binary Dammann grating CGH, respectively. Microholes were drilled through a 0.03 mm thick stainless steel foil using the multiple annular beams. By avoiding huge laser output attenuation and mechanical annular scanning, the processing is ~200 times faster than the normal single beam processing