摘要
进行了锻铝合金(LD31)薄板试样在短脉冲强激光冲击下的实验研究.结果表明:在强激光冲击下,试样发生显著的塑性变形,变形后轴截面形状为类圆锥形;试样塑性变形量随激光能量的增加而增加,随着试样的厚度增加而减小;在其他工艺参数相同的情况下,圆形试样比正方形试样更容易发生塑性变形;试样冲击变形区正反二面表面粗糙度值下降,表面光洁度得到明显提高;试样冲击区的硬度没有得到显著提高,这和冲击强化有着很大不同;当激光能量的增加或者试样厚度减薄到一定程度时,试样将发生层裂,从其断口的形貌来看,其断裂方式属于韧性断裂.
The experimental results of metal sheet of 6063 aluminum alloy loaded by shock waves induced by high-power short-duration pulse laser were proposed in this paper.The specimen irradiated by intense laser generates distinct plastic deformation,and the profile of axial cross section of specimen after shocking is similar to a coniform figure.The plastic deformation of specimen grows with the increasing energy of laser and decreases with the enhancing thickness of the specimen.Under the same conditions,the circu...
出处
《华中科技大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2007年第S1期139-142,共4页
Journal of Huazhong University of Science and Technology(Natural Science Edition)
基金
国家自然科学基金资助项目(50475127
50675089
50675090)
江苏省自然科学基金资助项目(BK2005054)
关键词
激光冲击
塑性变形
硬度
粗糙度
层裂
laser shocking
plastic deformation
hardness
finish
spallation
