南京航空航天大学学报（英文版）2022，Vol.39Issue(3)：358-366,9.
Al‑Cu‑Li合金激光填丝焊接头的组织与性能
Microstructure and Mechanical Property of Al?Cu?Li Alloy Joint by Laser Welding with Filler Wire
摘要
Abstract
The Al-Cu-Li alloy is welded by using laser beam welding,and the welding wire ER4043 is used as filler metal. The microstructure and mechanical property of welded joints are systematically investigated. Microstructure analyses show that the fusion zone is mainly composed of α-Al matrix phase and some strengthening phases including T,δ′,θ′,β′ and T1,etc. During welding,the weld formation and joint quality are obviously improved by the addition of Al-Si filler wire. The measurements of mechanical property indicate that,compared with that of the base metal (BM), the microhardness in the weld zone is decreased to a certain extent. Under the appropriate welding parameters,the tensile strength of welded joint reaches 369.4 MPa,which is 67.8％ of that of the BM. There are many dimples on the joint fracture surface,and it mainly presents the fracture characteristic of dimple aggregation.关键词
Al‑Cu‑Li合金/激光填丝焊/微观结构/力学性能Key words
Al-Cu-Li alloy/laser welding with filler wire/microstructure/mechanical property分类
矿业与冶金引用本文复制引用
李康,王少刚,胡冰周..Al‑Cu‑Li合金激光填丝焊接头的组织与性能[J].南京航空航天大学学报（英文版）,2022,39(3):358-366,9.基金项目
This work was supported by the KeyResearch and Development Program of Zhenjiang City(No.GY2019004). （No.GY2019004）
