Experimental investigation on joining of dissimilar metals of AISI 316 and nickel 201 using co2 laser

Abstract

Laser welding provides superior outcomes compared to more newlinetraditional joining procedures in situations involving the joining of dissimilar newlinemetals. High-power, high-density focused beams are able to resolve the newlinewidespread fusion problems that are brought on by variations in thermal newlineconductivity. Laser welding has proven to be an effective method for joining newlinelow-carbon and alloy steels, stainless steel, titanium and its alloys, and some newlinenickel alloys. The amount of heat energy delivered to a joint determines the newlinegeometry of the weld bead and the penetration depth. The amount of laser newlineenergy input is determined by a well-coordinated combination of the factors newlinethat govern the welding process. Even if the metals have different heat newlineconductivities and coefficients of thermal expansion, CO2 laser welding can newlinebe used to deal with the problem of residual stress that often happens when newlinedifferent metals are joined together. newlineHigh-power CO2 laser welding is a technology that is extensively newlineemployed across a variety of industries because of its precision, speed, less newlineheat affected zone, and low levels of distortion. By concentrating the laser newlinebeam, it is possible to create a tiny area that has a high optical intensity. This newlinemakes it possible for the material to undergo a finer heating scale, which newlinebrings the substance to its melting point in a shorter amount of time. It takes newlinejust a few nanoseconds for the material to reach the temperature at which it newlinewill melt. Focal length, shielding gas, laser power, and welding speed, beam newlineangle, gas flow rate are some of the critical process characteristics that must newlinebe controlled in order to manage the output parameters. When the optimum newlinelaser power and welding speed are used together, the best penetration with the newlineleast amount of heat can be attained. newline