Pre-loaded LY12 aluminum alloy irradiated by high-power laser beam
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摘要: 对受拉、受压和扭曲加载的LY12铝合金板被连续CO2激光辐照后的热力机械响应、应力状态、变形及破坏等进行了研究,同时研究了各种不同加载形式下的激光辐照破坏的工艺参数范围,分析了激光辐照破坏区的微观结构。研究表明,在激光辐照和机械加载的联合作用下,激光辐照烧斑区产生部分熔化和凹陷,在辐照区的边缘产生裂纹和皱折,最终导致破坏。另外,还具体分析了几种试件的破坏特征。Abstract: Thermal and mechanical response,stress statute,deformation and damage of pre-pulled,pre-pressed and pre twisted LY12 aluminum alloy specimens caused by irradiation of high-power CW CO2 laser beam were studied in this paper.The parameters of laser irradiation and the microstructure of laser irradiated area were analyzed for different types of pre loading and different shapes of specimens. Under the combined laser beam irradiation and mechnical pre-loading,the laser beam irradiated area on the specimen was melt and depressed,causing fracture on the border area,and finally being damaged.
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Keywords:
- CO2 laser beam /
- damage mechanism /
- LY12 aluminum alloy
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