Damage Analysis of Cemented Carbide Tool in High Speed Milling Induced by Thermal Stress with Laser Shock
Damage of fine grained hard metals WC-10%Co was investigated using the laser thermal shock method. Cemented carbide insert was irradiated with a high power laser and scanning electron microscopy was used to characterize the damage in the surface. Stress was analysis with thermo-elastic theory after thermal shock cycles. Crack initiation of cemented carbide was primarily induced by high thermal shock cycles under high rotation speed and low feed rate. Tangential stress played a primary role in crack initiation and it was demonstrated that why the thermal cracks always perpendicular to the cutting edge.
Julong Yuan, Shiming Ji, Donghui Wen and Ming Chen
Y. Wan et al., "Damage Analysis of Cemented Carbide Tool in High Speed Milling Induced by Thermal Stress with Laser Shock", Advanced Materials Research, Vols. 69-70, pp. 399-402, 2009