Numerical simulation of the unique rotating arc behaviors during narrow-groove GTAW
文献类型：期刊论文
| 作者 | Li, Kan2; Jia, Chuanbao2,3; Fang, Chao4 ; Hu, Jiakun1; Xu, Shichang2; Wang, Yinggang2; Wu, Chuansong2,3
|
| 刊名 | JOURNAL OF MANUFACTURING PROCESSES
 |
| 出版日期 | 2024-12-12 |
| 卷号 | 131 |
| 关键词 | Numerical simulation Rotating arc Narrow-groove GTAW Arc behaviors Titanium alloy |
| ISSN号 | 1526-6125 |
| DOI | 10.1016/j.jmapro.2024.09.109 |
| 通讯作者 | Jia, Chuanbao(jiachuanbao@sdu.edu.cn) |
| 英文摘要 | As a novel heat source, the rotating arc based on non-axisymmetric tungsten electrode has been applied in narrow groove welding of thick plates, i.e. narrow-groove gas tungsten arc welding (NG-GTAW). The rotating arc can periodically heat the sidewalls, thereby achieving reliable sidewall penetration and effectively avoiding nonfusion defects. To analyze the unique arc characteristics as well as the mechanism of arc heat acting on the sidewalls, a 3D model of the unique rotating arc under narrow groove condition was established. By calculating the thermal field and flow field distribution of the arc plasma, the variation of arc morphology during the rotation of the tungsten electrode was investigated and verified through actual arc images. To satisfy the principle of minimum voltage, when the tungsten electrode turns to one side, a conductive channel forms between the tungsten electrode tip and the sidewall, causing the arc to deflect towards the sidewall. More Joule heat and electron transfer heat occur at the sidewall and ensure reliable penetration. The position of the arc pressure acting on the anode surface shifts from the center of the groove to the sidewall, with part of the arc pressure being converted into shear force. As the welding current increases, the high-temperature region of the arc expands significantly, and the arc temperature and current density near the sidewall increase, which facilitates achieving deeper sidewall penetration. The numerical simulation results show that when the current is 280 A, the arc heat can ensure a reliable sidewall penetration and avoid the overheating of the molten pool caused by excessive current. The rotating arc NG-GTAW method was employed to weld Ti-6Al-4V with a thickness of 20 mm, producing a welded joint with significant sidewall penetration. The microstructure of the welded joint primarily consists of coarse beta phase columnar grains and an internal basketweave structure. The welded joint has high tensile strength and impact toughness, and HAZ is the weak area of the whole joint. |
| WOS关键词 | TRANSPORT-COEFFICIENTS ; MICROSTRUCTURE ; ARGON |
| 资助项目 | Shandong Provincial Science Foundation for Distinguished Young Scholars[ZR2023JQ018] ; Key Research and Development Program of Shandong Province[2021ZLGX01] ; Cyrus Chung Ying Tang Foundation |
| WOS研究方向 | Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001332647200001 |
| 出版者 | ELSEVIER SCI LTD |
| 资助机构 | Shandong Provincial Science Foundation for Distinguished Young Scholars ; Key Research and Development Program of Shandong Province ; Cyrus Chung Ying Tang Foundation |
| 源URL | [http://ir.hfcas.ac.cn:8080/handle/334002/134572]  |
| 专题 | 中国科学院合肥物质科学研究院 |
| 通讯作者 | Jia, Chuanbao |
| 作者单位 | 1.Qingdao Prod Qual Testing Res Inst, Qingdao 266101, Peoples R China 2.Shandong Univ, Inst Mat Joining, MOE Key Lab Liquid Solid Struct Evolut & Mat Proc, Jinan 250061, Peoples R China 3.Shandong Univ, Weihai Res Inst Ind Technol, Weihai 264209, Peoples R China 4.Chinese Acad Sci, Hefei Inst Phys Sci, Hefei 230031, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Kan,Jia, Chuanbao,Fang, Chao,et al. Numerical simulation of the unique rotating arc behaviors during narrow-groove GTAW[J]. JOURNAL OF MANUFACTURING PROCESSES,2024,131. |
| APA | Li, Kan.,Jia, Chuanbao.,Fang, Chao.,Hu, Jiakun.,Xu, Shichang.,...&Wu, Chuansong.(2024).Numerical simulation of the unique rotating arc behaviors during narrow-groove GTAW.JOURNAL OF MANUFACTURING PROCESSES,131. |
| MLA | Li, Kan,et al."Numerical simulation of the unique rotating arc behaviors during narrow-groove GTAW".JOURNAL OF MANUFACTURING PROCESSES 131(2024). |
入库方式： OAI收割
来源：合肥物质科学研究院
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。