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Laser forming of bi-layer Fe/Al sheet by Nd: YAG laser

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In this paper, numerical and experimental approaches to this phenomenon on were conducted. Numerical method comprised of couple heat-displacement. In it, heat flux distribution of laser beam was applied on the steel layer in Gaussian form and by using subroutine code writing procedure. | Laser forming of bi-layer Fe Al sheet by Nd YAG laser Engineering Solid Mechanics 2 2014 303-312 Contents lists available at GrowingScience Engineering Solid Mechanics homepage www.GrowingScience.com esm Laser forming of bi-layer Fe Al sheet by Nd YAG laser Mohammad Riahia Mohamad Hoseinpour Gollob and Seiied Nader Ameli Kalkhorana a Department of Manufacturing Engineering Iran University of Science and Technology Narmak Tehran Iran b Manufacturing Engineering Department Shahid Rajaee Teacher Training University Tehran Iran ARTICLE INFO ABSTRACT Article history Laser forming is a modern metal forming method in which no mechanical force is needed. In Received June 6 2014 this paper numerical and experimental approaches to this phenomenon on were conducted. Accepted 24 July 2014 Numerical method comprised of couple heat-displacement. In it heat flux distribution of laser Available online beam was applied on the steel layer in Gaussian form and by using subroutine code writing 24 July 2014 Keywords procedure. Experimental tests were conducted by using Nd YAG laser with maximum power Laser Forming of 300 watts and on a bi-layer Fe Al work piece. The result of bending angle at different laser Metal forming power ranges indicated that bending angle increases occur as this parameter is increased. Bi-layer sheet Fe AL 2014 Growing Science Ltd. All rights reserved. 1. Introduction Laser Forming LF phenomenon is a new technique that has been used since early 1990s. This process is mainly used for sheet metal forming. Its base is on producing heat stress by laser beam radiation on the sheet Namba 1985 . Many complex parameters of laser beam characteristics e. g. power wave length laser beam diameter and laser beam velocity are among parameters governing this process. Moreover other characteristics like thermal and mechanical properties of the work piece such as coefficient of heat absorption and conductivity have effect on the LF process Scully 1987 Shen amp Vollertsen 2009