Numerical Analysis Of Thermal Effect In Aluminum Alloy By Repetition Frequency Pulsed Laser

The laser-matter interaction physics is the important foundation of laser applications, aluminum alloy is one of the most widely used materials in the industrial applications, long pulse repetition frequency laser effects on metal materials mainly for thermal effect. Thus the research on thermal effect caused by repetition frequency pulsed laser action on aluminum alloy has important application value.Based on heat transfer theory, the classical Fourier heat conduction equation and finite element numerical calculation method are used to establish the model of temperature rise during repetition frequency pulsed laser action on aluminum alloy. The equivalent specific heat method is used to process the problem of phase transition, and taking into account the situation that thermal physical parameters of aluminum alloy change with temperature, calculate the spatial and temporal distribution of temperature field of aluminum alloy with different repetition frequencies and energy densities of pulsed laser, and the vaporizing threshold and temperature drop process of aluminum alloy are calculated and analyzed, the variation of aluminum alloy space-time temperature distribution with different repetition frequencies and energy densities is achieved.