超声振动辅助电弧增材制造2219铝合金的显微组织及力学性能  

Microstructure and mechanical properties of 2219 aluminum alloy manufactured by ultrasonic vibration assisted wire and arc additively manufacturing

作　　者：李攀 郭顺[1] 杨东青 彭勇[1] 闫德俊 李东 王克鸿[1] LI Pan;GUO Shun;YANG Dong-qing;PENG Yong;YAN De-jun;LI Dong;WANG Ke-hong(Key Laboratory of Controlled Arc Intelligent Additive Technology,Ministry of Industry and Information Technology,Nanjing University of Technology,Nanjing 210094,China;Guangdong Provincial Key Laboratory of Advanced Welding Technology for Ships,China State Shipbuilding Corporation Huangpu Wenchong Shipbuilding Company Limited,Guangzhou 510715,China)

机构地区：[1]南京理工大学受控电弧智能增材技术工业和信息化部重点实验室,南京210094 [2]中船黄埔文冲船舶有限公司广东省舰船先进焊接技术企业重点实验室,广州510715

出　　处：《中国有色金属学报》2023年第7期2081-2089,共9页The Chinese Journal of Nonferrous Metals

基　　金：中国博士后科学基金资助项目(2020M682930);国家自然科学基金资助项目(52105367);江苏省博士后资助计划项目(2021K591C)。

摘　　要：在附加与焊枪同步运动的超声振动辅助条件下,采用电弧增材制造技术制备2219铝合金单道多层沉积件,并分析其显微组织与力学性能的变化。结果表明:附加超声振动后试样的晶粒明显细化,晶粒粒径在20μm以下的比例由29.32%提升至46.59%,平均粒径由36.80μm下降至30.19μm。同时,在试样的显微组织中出现了大量的亚晶区。经附加超声振动后,试样的显微硬度由79.9HV提升至93.8HV,试样在竖直方向上的拉伸性能得到了一定程度的强化,水平方向上的屈服强度也有所提升,但伸长率显著下降,这可能与拉伸件中存在的缺陷相关。Microstructure and mechanical properties of 2219 aluminum alloy single-pass multi-layer part deposited by ultrasonic vibration(UV)assisted wire and arc additive manufacturing were analyzed.The results show that the grain size of the sample is obviously refined with UV.The proportion of grain with diameter below 20μm increases from 29.32%to 46.59%,and the average grain diameter decreases from 36.80μm to 30.19μm.Meanwhile,a large number of sub-crystalline grain regions exist in the microstructure of the sample with UV.The microhardness of the sample with UV increases from 79.9HV to 93.8HV.The tensile properties of the samples with UV in the vertical direction are strengthened.The yield strength in the horizontal direction also increases,but the elongation decreases significantly,which can be attributed to the defects in the tensile samples.

关 键 词：2219铝合金 电弧增材制造 超声振动 显微组织 力学性能 

分 类 号：TG455[金属学及工艺—焊接]