【摘要】 给出长脉冲1.06μm激光对LY12铝板一维热熔融的有效熔融热、激光熔融阈值强度和金相显微分析的结果。得到激光加热与激光热应力联合引起材料破坏的新见解。当入射激光强度I=24～220kW/cm~2时,有效熔融热Q=3.5～57kJ/g,激光熔融阈值强度为10kW/cm~2。更多还原

【Abstract】 The Results of one -dimensional effective melting heat, laser melting threshold intensity and metallography microscope analysis for the LY12 aluminium alloy targets irradiated by long-duration (6ms) 1.06μm laser beams are given in this report. A new explanation of yielding material damage by laser ablation combined with laser thermal stress is also presented. When laser intensity ranges from 24kW/cm2 to 220kW/cm2, the effective melting heat Q = 3.5 ~57kJ/g, and the laser threshold intensity for melting is about 10kW/cm2.更多还原