• 综合
  • 标题
  • 关键词
  • 摘要
  • 学者
  • 期刊-刊名
  • 期刊-ISSN
  • 会议名称
搜索

作者:

Wang, Xiaowei (Wang, Xiaowei.) | Zhang, Pengtian (Zhang, Pengtian.) | Liu, Kun (Liu, Kun.) | Yan, Zhaoyang (Yan, Zhaoyang.) | Meng, Danyang (Meng, Danyang.) | Jia, Yazhou (Jia, Yazhou.) | Chen, Shujun (Chen, Shujun.) (学者:陈树君)

收录:

EI Scopus SCIE

摘要:

To solve the problem of insufficient strength of thick aluminum alloy welded joints, this study introduces a pioneering technique known as variable-polarity plasma arc keyhole-tungsten inert gas cover hybrid welding (VPPA keyhole-TIG covering welding), which is designed for welding large-thickness aluminum alloys without any weld groove. Using 13-mm-thick 2319 aluminum alloy plates as experimental materials, plasma arc butt welding experiments were conducted by varying the plasma gas flow rate and application of cover welding. The research findings underscored that the use of cover welding, coupled with an increase in the plasma gas flow rate, markedly improved the overall performance of the weld. An average tensile strength of 299.0 +/- 4.0 MPa and an elongation rate of 4.5 +/- 0.3 % were achieved for the welded joint. A microscopic analysis revealed that the heightened plasma gas flow rate did not precipitate the 0' phase but instead resulted in undesired grain size enlargement, leading to reduced joint hardness. The secondary thermal cycle effect of covering welding played a pivotal role in facilitating the nucleation of needle-like 0' strengthening phases within the matrix, ranging in size from 50 to 150 nm. This phenomenon has emerged as a principal factor contributing to the substantial enhancement of the mechanical properties of welded joints.

关键词:

Al-alloy Plasma gas Mechanical properties Microstructure Thick plate Keyhole welding

作者机构:

  • [ 1 ] [Wang, Xiaowei]Beijing Univ Technol, Coll Mech & Energy Engn, 100 Pingyuan Pk, Beijing 100124, Peoples R China
  • [ 2 ] [Liu, Kun]Beijing Univ Technol, Coll Mech & Energy Engn, 100 Pingyuan Pk, Beijing 100124, Peoples R China
  • [ 3 ] [Yan, Zhaoyang]Beijing Univ Technol, Coll Mech & Energy Engn, 100 Pingyuan Pk, Beijing 100124, Peoples R China
  • [ 4 ] [Chen, Shujun]Beijing Univ Technol, Coll Mech & Energy Engn, 100 Pingyuan Pk, Beijing 100124, Peoples R China
  • [ 5 ] [Zhang, Pengtian]Beijing Spacecrafts Co Ltd, Beijing 100094, Peoples R China
  • [ 6 ] [Meng, Danyang]Tianjin Aerosp Long March Rocket Mfg Co, Ltd, Tianjin 300462, Peoples R China
  • [ 7 ] [Jia, Yazhou]North China Inst Aerosp Engn, Coll Mat Engn, Langfang 065000, Peoples R China

通讯作者信息:

  • [Yan, Zhaoyang]Beijing Univ Technol, Coll Mech & Energy Engn, 100 Pingyuan Pk, Beijing 100124, Peoples R China;;

查看成果更多字段

相关关键词:

来源 :

JOURNAL OF MATERIALS PROCESSING TECHNOLOGY

ISSN: 0924-0136

年份: 2024

卷: 330

6 . 3 0 0

JCR@2022

被引次数:

WoS核心集被引频次:

SCOPUS被引频次:

ESI高被引论文在榜: 0 展开所有

万方被引频次:

中文被引频次:

近30日浏览量: 0

归属院系:

在线人数/总访问数:458/4876596
地址:北京工业大学图书馆(北京市朝阳区平乐园100号 邮编:100124) 联系我们:010-67392185
版权所有:北京工业大学图书馆 站点建设与维护:北京爱琴海乐之技术有限公司