Keyhole welding of AA2219 aluminum alloy with double-pulsed variable polarity gas tungsten arc welding

Yipeng Wang; Bojin Qi; Baoqiang Cong; Mingjie Zhu; Sanbao Lin

doi:10.1016/j.jmapro.2018.06.006

Keyhole welding of AA2219 aluminum alloy with double-pulsed variable polarity gas tungsten arc welding

Yipeng Wang
, Bojin Qi
, Baoqiang Cong^*
, Mingjie Zhu
, Sanbao Lin

^*Corresponding author for this work

School of Materials Science and Engineering

Beihang University
MIIT Key Laboratory of Aeronautics Intelligent Manufacturing

Research output: Contribution to journal › Article › peer-review

36 Scopus citations

Abstract

A novel ultrasonic frequency double-pulsed variable polarity gas tungsten arc welding (DP-VPTIG) process was developed in the keyhole welding of 7 mm AA2219 aluminum alloy. The stable keyhole welding process was successfully achieved through analyzing the effects of characteristic current parameters on the weld formation. In low-frequency pulse peak stage, the fully penetrated keyhole formed owing to the high penetrating arc. In low-frequency pulse base stage, the keyhole closed as the arc force sharply declined. Fully equiaxed weld zone grain structures were obtained due to the stirring effect of the double pulses. The distribution of microhardness in the welded joint was consistent with that of the microstructure. It is expected to effectively improve the welding efficiency in aluminum alloy fabrication using DP-VPTIG process.

Original language	English
Pages (from-to)	179-186
Number of pages	8
Journal	Journal of Manufacturing Processes
Volume	34
DOIs	https://doi.org/10.1016/j.jmapro.2018.06.006
State	Published - Aug 2018

Keywords

Aluminum alloy
Arc welding
Double pulses
Keyhole welding

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10.1016/j.jmapro.2018.06.006

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@article{09335be8ee254391abd710a377b8c333,

title = "Keyhole welding of AA2219 aluminum alloy with double-pulsed variable polarity gas tungsten arc welding",

abstract = "A novel ultrasonic frequency double-pulsed variable polarity gas tungsten arc welding (DP-VPTIG) process was developed in the keyhole welding of 7 mm AA2219 aluminum alloy. The stable keyhole welding process was successfully achieved through analyzing the effects of characteristic current parameters on the weld formation. In low-frequency pulse peak stage, the fully penetrated keyhole formed owing to the high penetrating arc. In low-frequency pulse base stage, the keyhole closed as the arc force sharply declined. Fully equiaxed weld zone grain structures were obtained due to the stirring effect of the double pulses. The distribution of microhardness in the welded joint was consistent with that of the microstructure. It is expected to effectively improve the welding efficiency in aluminum alloy fabrication using DP-VPTIG process.",

keywords = "Aluminum alloy, Arc welding, Double pulses, Keyhole welding",

author = "Yipeng Wang and Bojin Qi and Baoqiang Cong and Mingjie Zhu and Sanbao Lin",

note = "Publisher Copyright: {\textcopyright} 2018 The Society of Manufacturing Engineers",

year = "2018",

month = aug,

doi = "10.1016/j.jmapro.2018.06.006",

language = "英语",

volume = "34",

pages = "179--186",

journal = "Journal of Manufacturing Processes",

issn = "1526-6125",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - Keyhole welding of AA2219 aluminum alloy with double-pulsed variable polarity gas tungsten arc welding

AU - Wang, Yipeng

AU - Qi, Bojin

AU - Cong, Baoqiang

AU - Zhu, Mingjie

AU - Lin, Sanbao

PY - 2018/8

Y1 - 2018/8

N2 - A novel ultrasonic frequency double-pulsed variable polarity gas tungsten arc welding (DP-VPTIG) process was developed in the keyhole welding of 7 mm AA2219 aluminum alloy. The stable keyhole welding process was successfully achieved through analyzing the effects of characteristic current parameters on the weld formation. In low-frequency pulse peak stage, the fully penetrated keyhole formed owing to the high penetrating arc. In low-frequency pulse base stage, the keyhole closed as the arc force sharply declined. Fully equiaxed weld zone grain structures were obtained due to the stirring effect of the double pulses. The distribution of microhardness in the welded joint was consistent with that of the microstructure. It is expected to effectively improve the welding efficiency in aluminum alloy fabrication using DP-VPTIG process.

AB - A novel ultrasonic frequency double-pulsed variable polarity gas tungsten arc welding (DP-VPTIG) process was developed in the keyhole welding of 7 mm AA2219 aluminum alloy. The stable keyhole welding process was successfully achieved through analyzing the effects of characteristic current parameters on the weld formation. In low-frequency pulse peak stage, the fully penetrated keyhole formed owing to the high penetrating arc. In low-frequency pulse base stage, the keyhole closed as the arc force sharply declined. Fully equiaxed weld zone grain structures were obtained due to the stirring effect of the double pulses. The distribution of microhardness in the welded joint was consistent with that of the microstructure. It is expected to effectively improve the welding efficiency in aluminum alloy fabrication using DP-VPTIG process.

KW - Aluminum alloy

KW - Arc welding

KW - Double pulses

KW - Keyhole welding

UR - https://www.scopus.com/pages/publications/85048283168

U2 - 10.1016/j.jmapro.2018.06.006

DO - 10.1016/j.jmapro.2018.06.006

M3 - 文章

AN - SCOPUS:85048283168

SN - 1526-6125

VL - 34

SP - 179

EP - 186

JO - Journal of Manufacturing Processes

JF - Journal of Manufacturing Processes

ER -

Keyhole welding of AA2219 aluminum alloy with double-pulsed variable polarity gas tungsten arc welding

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Keywords

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