Investigation of Surface Residual Stress for Medium Carbon Steel Quenched by YAG Laser with Extended Cycloidal Motion

This study investigated the surface residual stress for AISI 1045 steel quenched by a YAG laser. A coaxial laser spindle was installed on CNC machine experiment. The motion arranged to follow path of an extended cycloid which widened quenching area surface. Both temperature distribution and stresses were measured thermocouples portable X-ray diffractometer, respectively. When cooled down near value room temperature, then after process. diffractometer used single exposure with two-dimensional detector calculate Debye–Scherrer ring (D-S ring) determination normal shear stresses. Different powers exploited measurement stresses, including 500, 600, 700, 900 watts. In addition experiment, analytic model investigation built finite element analysis MSC Marc used. assumption FEA that spot had circular shape uniform energy thermal–elastic–plastic applied simulation experimental results excellent consistency maximum difference 10.5% from numerical also revealed compressive laser-quenching treatment could be neglected compared stress.