文献类型：期刊文献

英文题名：Ultrafast-convert laser high-frequency pulse composite heat source welding process and joints properties research on 2219 aluminum alloy

作者：Gao, Zongyu[1,2]; Fang, Jianjun[1]; Zhang, Yinong[1]; Guo, Wenrong[1]; Du, Mingfang[1]; Ran, Guowei[3]

第一作者：Gao, Zongyu;高宗余

机构：[1] College of Automation, Beijing Union University, No. 97, Beisihuan East Road, Chaoyang District, Beijing 100101, China; [2] School of Electrical Engineering, Beijing Jiaotong University, No. 3, Shang Yuan Cun, Haidian District, Beijing 100044, China; [3] Chinese Academy of Agricultural Engineering, Beijing 100104, China

第一机构：北京联合大学城市轨道交通与物流学院

年份：2014

卷号：8

期号：5

起止页码：1327-1334

外文期刊名：ICIC Express Letters

收录：EI(收录号：20142717903617);Scopus(收录号：2-s2.0-84903484169)

语种：英文

外文关键词：Aluminum alloys - Corrosion resistance - Crystal structure - Electric welding - Fracture - Inert gases - Stress corrosion cracking

摘要：In order to verify the influence performance of the welding process that adds high frequency pulse to low-power laser assisted TIG (Tungsten Inert Gas) welding with filler wire, low-power laser assisted TIG hybrid welding and laser high-frequency pulse TIG hybrid welding were applied to test 6mm-thick 2219 aluminum alloy welding; through three welding processes experiments, the correlation between welding process and joints structure as well as performance was studied. The results show that laser high-frequency pulse TIG hybrid welding increases welding speed, reduces heat input significantly, refine the welding structure, and reduce the width of Eutectic α(Al) + θ(CuAl2) structure of crystal boundary, especially effectively eliminates the blowhole defect of welding fusion zone. Furthermore, the joint properties and stress corrosion resistance both are improved significantly. The average fracture time for 2219 aluminum alloy through the laser highfrequency pulse TIG hybrid welding is significantly longer than that through the TIG welding, which is about 94% of the average fracture time for 2219 based material. ? ICIC International 2014.