【摘要】 用高温应变计和热偶计等诊断技术，研究连续波氧碘化学激光（ＣＷ／ＣＯＩＬ）与铝合金板作用产生的激光热应力。当照射靶面激光强度约１０００Ｗ／ｃｍ２时，激光热应力随靶厚的增加而快速减小。当激光辐照靶材厚度ｈ＝１．００ｍｍ、激光强度Ｉ＝６４０～９８０Ｗ／ｃｍ２时，激光热应力随辐照靶面激光强度的增加而增大。两者的激光热应力－时间曲线随靶厚的减薄或随辐照靶面激光强度的增加而变得越来越复杂。当靶厚ｈ≤２．５０ｍｍ，辐照靶面激光强度Ｉ≥８００Ｗ／ｃｍ２时，激光热应力强度超过激光辐照区材料断裂强度，萌生许多孔洞裂纹，引起材料断裂破坏。更多还原

【Abstract】 The laser thermal stress induced in the aluminum alloy plate irradiated by CW/COIL were investigated by high temperature straingauge and thermocouple gauge and other diagnostic techniques in this paper.When the laser intensity irradiated on the target surface is about 1000W/cm 2 ,the laser thermal stress descends rapidly with the increase of target thickness;for the target thickness h =1.00mm irradiated by laser beams,and the laser intensity I =640～980W/cm 2,the laser thermal stress increases with the increase of laser intensity irradiated on the target surface.Both types of the laser thermal stress time curves become complicated with the decrease of the target thickness or with the increase of laser intensity irradiated on the target surface.When target thickness h ≤2.50mm and laser intensity I ≥800W/cm 2 ,the laser thermal stress strength is greater than the material fracture strength in the laser irradiation zone,holes and fracture strips occur and materials damage.更多还原