激光弯曲机理的评述  

Remark on laser bending mechanisms

作　　者：苏余鹏[1] 王秀凤[1] 陈光南[2] 胡世光[1] Janos Takacs Gyorgy Krallics 

机构地区：[1]北京航空航天大学机械工程及自动化学院,北京100083 [2]中国科学院力学所材料工艺研究中心,北京100080 [3]Budapest University of Technology and Economics

出　　处：《材料科学与工艺》2004年第5期543-545,共3页Materials Science and Technology

摘　　要：对激光弯曲变形机理问题进行了探讨,提出了激光弯曲的变形机理本质上是温度梯度机理,反向弯曲机理和增厚机理是当材料厚度方向的温度梯度很小时,针对不同厚度的材料而出现的现象.实验发现有限厚度材料在激光辐照作用下,其内部产生了用经典傅里叶定律无法解释的非常规温度分布,将其定义为泛傅里叶效应,用于进一步揭示激光弯曲机理的实质.Laser bending mechanism is remarked and its essence is the temperature gradient mechanism. The reverse bending and the thickened mechanisms are included in the temperature gradient mechanism. We think that the reverse bending and the thickened of the material are only different phenomena based on different thickness of the material. Experimental result shows that there is a kind of un-convention temperature distribution in the limit thickness specimen under laser irradiation. This phenomenon cannot be explained by the classical Fourier Law and defined as Pan-Fourier effect in order to explain laser bending mechanism further.

关 键 词：激光弯曲 反向弯曲 变形机理 温度梯度 厚度 激光辐照 评述 非常规 有限 内部 

分 类 号：TB34[一般工业技术—材料科学与工程] TG665[金属学及工艺—金属切削加工及机床]