HEAT-TRANSFER ANALYSIS OF A SEMIINFINITE SOLID HEATED BY A LASER-BEAM

Laser heating of semi-infinite solid substance is List of Symbols intr oduced and analytical solution appropriate to the laser machining powe r intensities is obtained. Both conduction limited and non-conduction limited cases are considered. The limiting cases in non-conduction lim ited equation are investigated and the equation governing the conducti on limited heating is deduced. In the case of non-conduction limited h eating process, the location of maximum temperature and its functional relation with the substance and laser properties are developed. Stead y state analysis of the heating process is taken into account and limi ting laser power intensity is concluded. In addition, the applicabilit y of Fourier heat conduction equation in laser heating is discussed.