Use of high power diode laser arrays for pre- and post-weld heating during friction stir welding of steels
MetadataShow full item record
In this research a high-power diode laser array was used to preheat HY-80 steel to determine the efficacy of using a diode laser array for preheating prior to friction stir welding in order to reduce frictional forces thereby reducing tool wear and increasing welding speeds. Using instrumented plates the temperature profile using diode heating alone was determined in order to validate theoretical models. A high-power diode laser is proposed as a more cost effective and efficient means of preheating compared to other hybrid friction stir welding techniques. Parameters of the diode array were easily controllable and resulted in a preheated area that very closely matches the typical stir zone observed in friction stir welds. A proposed diode laser assisted friction stir welding system is presented, and it is hypothesized that the addition of diode laser preheating will improve tool life and/or increase welding speeds on steels.
Showing items related by title, author, creator and subject.
Processing, microstructure, and material property relationships following friction stir welding of oxide dispersion strengthened steels Baker, Bradford W. (Monterey, California: Naval Postgraduate School, 2013-09);A comprehensive set of processing, microstructure, and material property relationships is presented for friction stir welded oxide dispersion strengthened MA956 steel. Eight rotational and traverse speed combinations were ...
Farmer, Joseph C.; Legrande, Peggy S.; Menon, Sarath K.; McNelley, Terry R. (Livermore, California. Lawrence Livermore National Laboratory, 2013-10-04);The Friction Stir Processing (FSP) and Friction Stir Welding (FSW) welding of nickel aluminum bronze (NAB) is used for a variety of naval applications. This paper investigates the beneficial effects of FSP ...
Characterization of residual stress as a function of friction stir welding parameters in ODS steel MA956 Bennett, Martin S. (Monterey, California: Naval Postgraduate School, 2013-06);This thesis characterizes the residual stresses generated by friction stir welding of ODS steel MA956 as a function of heat index. The heat index of a weld is used to determine relative heat input among different friction ...