ONE METHOD OF DETERMINATION OF THE EFFECTIVE ABSORPTION COEFFICIENT IN PULSED LASER IRRADIATION OF METALSA. Evtushenko,a,b E. Ivanik,a and K. Rozniakowskib UDC 539.377 An experimental-theoretical method of determination of the absorption coefficients in laser treatment of metals has been proposed based on the solution of the boundary-value axisymmetric problem of heat conduction for a half-space and metallographic measurements of the dimensions of the thermal-hardening zone. aYa. S. Podstrigach Institute of Applied Problems of Mechanics and Mathematics, National Academy of Sciences of Ukraine, L'vov, Ukraine; b Polytechnic Institute (Politechnika Lodzka), Lodz, Poland. Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 76, No. 5, pp. 10-15, September-October, 2003. Original article submitted November 28, 2002.