Abstract
This paper evaluates the influence of laser power on the rotary friction welding (RFW) process to improve the mechanical performance and microstructural evolution of AISI 1045 steel and 2017-T4 aluminum alloy joints. As part of this evaluation, the absolute chemical determination of these materials was precisely measured using a GDOES bulk analysis. The application of laser power during friction welding is known as laser-assisted friction welding. To evaluate the effect of the energy from the laser on the rotary joining process of steel-aluminum, a laser-assisted rotary friction welding process was set up, and a design of experiments (DOE) applied. First, a DOE consisting of two factors at two levels was used to evaluate the effect of friction pressure and rotational speed on the hardness and tensile strength of the weldment. Then, a mixed DOE of three factors at two and three levels was implemented to investigate the effect laser heat treatment has on the process. It was concluded that the application of a laser heat treatment plays a significant role in the resulting mechanical performance and microstructural evolution of RFW steel-aluminum joints. Increasing both the ultimate tensile strength and the thickness of the Al(Fe, Cu) interface reaction layer between the joined materials.
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