铝箔吸收层厚度对激光诱导AZ31B镁合金冲击波的影响Effects of aluminum foil absorbing layer thickness on induced laser shock wave of AZ31B magnesium alloy
冯爱新,毛加成,程宝义,印成,曹宇鹏,章正刚,吴浩,张华夏,陆金花
摘要(Abstract):
为分析不同厚度的铝箔吸收层对激光在AZ31B镁合金薄板背面诱导的高应变率冲击波的影响,采用聚偏氟乙烯(PVDF)贴片传感器与数字示波器对强激光诱导的冲击波进行测量,利用测得的不同厚度吸收层下的压电波形,计算转换得到相应的冲击波压力波形。结果表明:铝箔吸收层厚度分别为100μm、200μm、300μm时,激光冲击波压力峰值随着吸收层厚度的增加而降低,冲击波第一个脉冲的脉宽随着吸收层厚度的增加而时间增长,即维持较高压力作用的时间增长;吸收层厚度为100μm时试样表面存在烧蚀损伤现象,吸收层厚度为300μm时,吸收层未完全气化,吸收层厚度为200μm时,冲击波作用的综合优势明显,吸收层过薄或过厚对冲击效果不利。
关键词(KeyWords): 激光冲击波;铝箔;吸收层;激光烧蚀;压力波形
基金项目(Foundation): 国家自然科学基金(51175237;51305050);; “高档数控机床与基础制造装备”科技重大专项(2013ZX04009031-4);; 科技部中俄双边政府间2014-2015科技合作项目(CR17-11);; 浙江省国际科技合作专项(2013C14007);; 温州市工业科技研究开发项目(J20130033);; 江苏省“六大人才高峰”A类项目;; 温州大学高级人才启动基金
作者(Author): 冯爱新,毛加成,程宝义,印成,曹宇鹏,章正刚,吴浩,张华夏,陆金花
DOI: 10.13289/j.issn.1009-6264.2016.05.002
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