微织构特征对铝合金-CFRTP激光焊接头力学性能的影响
Effect of microtexturing characteristics on the perform-ance of laser welded aluminum alloy-CFRTP joints
徐良 1李康宁 1杨海锋 1宋坤林 2谷世伟1
作者信息
- 1. 哈焊国创(青岛)焊接工程创新中心有限公司,青岛, 266111
- 2. 国家高速列车青岛技术创新中心,青岛, 266111
- 折叠
摘要
该文研究了激光毛化微织构特征对铝合金-CFRTP激光焊接接头性能的影响,分析了激光毛化微织构的作用机理.结果表明,利用激光毛化技术可以在铝合金表面构建微织构,获得成形良好且性能优异的铝合金-CFRTP激光焊接搭接接头,接头处形成了有效的异种材料紧密嵌合.随着激光毛化微织构深宽比的增大,熔融CFRTP在铝合金表面微织构中由全部填充转变为部分填充,接头拉伸剪切性能呈现先增大后减小的趋势,接头失效机制呈现"混合断裂(粘附断裂 + 内聚断裂)-CFRTP母材断裂-混合断裂"的变化.当深宽比达到 1.2～1.6时接头拉伸剪切性能值最大,此时断裂位置位于CFRTP母材.激光毛化微织构对铝合金-CFRTP接头强化机理为增强CFRTP在铝合金表面的机械嵌合作用,以及激光毛化微织构产生飞溅的"钉扎"作用.
Abstract
The effect of laser texturing on the performance of aluminium alloy-CFRTP laser welded joints was studied and the strengthening mechanism of laser texturing was analyzed.The results showed that the laser surfi-sculpt could be used to build texturing on the surface of aluminium alloys to obtain well-formed and high performance aluminium alloy-CFRTP laser welded lap joints,and the joint achieved tightly embed-ding.With the increasing of the depth-width ratio of the laser texturing,the molten CFRTP in the texturing was changed from fully filled to partially filled,and the joint shear proper-ties showed a trend of first increasing and then decreased,and the joint failure mechanism was changed from hybrid fracture(adhesive failure + cohesive failure),CFRTP base material fracture to hybrid fracture.The joint performance reached its maximum when the depth-width ratio reached 1.2 to 1.6,at which point the fracture location was located in the CFRTP base material.The strengthening mechanisms of the alumini-um alloy-CFRTP joint by laser texturing were enhancing mech-anical embedding and the"nailing"effect of splashing.
关键词
激光毛化微织构/碳纤维/复合材料/激光焊接Key words
laser texturing/carbon fiber/composite mater-ial/laser welding引用本文复制引用
基金项目
山东省重大科技创新工程计划资助(2021ZDPT02)
出版年
2024
NETL
NSTL
万方数据