Optimization of HPVP-GTAW process parameters for Al-Mg aluminum alloy welded joints

Ruijie Ouyang; Baoqiang Cong; Bojin Qi; Fangjun Liu

Optimization of HPVP-GTAW process parameters for Al-Mg aluminum alloy welded joints

Ruijie Ouyang
, Baoqiang Cong^*
, Bojin Qi
, Fangjun Liu

^*Corresponding author for this work

School of Mechanical Engineering and Automation

Beihang University

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

1 Scopus citations

Abstract

Optimization of hybrid ultrahigh frequency pulse variable polarity gas tungsten arc welding (HPVP-GTAW) process was carried out to obtain the optimum weld characteristics of 5A06-HX4 aluminum-magnesium alloy sheets of 3 mm thickness. The square butt joints were produced by HPVP-GTAW process, the microstructure and mechanical properties were systematically investigated. It is observed that the process parameters influence the weld microstructure and mechanical properties significantly. Weld microstructure is mainly composed of grid α(Al) solid solution, with a large number of intermetallic β(Mg₂Al₃) precipitates distributed in the matrix. The amount of β(Mg₂Al₃) precipitates has an obvious difference with different parameters. Compared with that of the base material, tensile strength of 5A06-HX4 alloy welded joints has a certain reduction, as well as the elongation and reduction of area. The optimized welding process parameters for 5A06-HX4 alloy sheets are presented.

Original language	English
Pages (from-to)	76-82
Number of pages	7
Journal	China Welding (English Edition)
Volume	23
Issue number	4
State	Published - 25 Dec 2014

Keywords

Aluminum alloy
Mechanical property
Ultrahigh frequency pulse current
Variable polarity gas tungsten arc welding

Cite this

@article{2d35a395757a4402a3967eabd93f9b3b,

title = "Optimization of HPVP-GTAW process parameters for Al-Mg aluminum alloy welded joints",

abstract = "Optimization of hybrid ultrahigh frequency pulse variable polarity gas tungsten arc welding (HPVP-GTAW) process was carried out to obtain the optimum weld characteristics of 5A06-HX4 aluminum-magnesium alloy sheets of 3 mm thickness. The square butt joints were produced by HPVP-GTAW process, the microstructure and mechanical properties were systematically investigated. It is observed that the process parameters influence the weld microstructure and mechanical properties significantly. Weld microstructure is mainly composed of grid α(Al) solid solution, with a large number of intermetallic β(Mg2Al3) precipitates distributed in the matrix. The amount of β(Mg2Al3) precipitates has an obvious difference with different parameters. Compared with that of the base material, tensile strength of 5A06-HX4 alloy welded joints has a certain reduction, as well as the elongation and reduction of area. The optimized welding process parameters for 5A06-HX4 alloy sheets are presented.",

keywords = "Aluminum alloy, Mechanical property, Ultrahigh frequency pulse current, Variable polarity gas tungsten arc welding",

author = "Ruijie Ouyang and Baoqiang Cong and Bojin Qi and Fangjun Liu",

year = "2014",

month = dec,

day = "25",

language = "英语",

volume = "23",

pages = "76--82",

journal = "China Welding (English Edition)",

issn = "1004-5341",

publisher = "KeAi Communications Co.",

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TY - JOUR

T1 - Optimization of HPVP-GTAW process parameters for Al-Mg aluminum alloy welded joints

AU - Ouyang, Ruijie

AU - Cong, Baoqiang

AU - Qi, Bojin

AU - Liu, Fangjun

PY - 2014/12/25

Y1 - 2014/12/25

N2 - Optimization of hybrid ultrahigh frequency pulse variable polarity gas tungsten arc welding (HPVP-GTAW) process was carried out to obtain the optimum weld characteristics of 5A06-HX4 aluminum-magnesium alloy sheets of 3 mm thickness. The square butt joints were produced by HPVP-GTAW process, the microstructure and mechanical properties were systematically investigated. It is observed that the process parameters influence the weld microstructure and mechanical properties significantly. Weld microstructure is mainly composed of grid α(Al) solid solution, with a large number of intermetallic β(Mg2Al3) precipitates distributed in the matrix. The amount of β(Mg2Al3) precipitates has an obvious difference with different parameters. Compared with that of the base material, tensile strength of 5A06-HX4 alloy welded joints has a certain reduction, as well as the elongation and reduction of area. The optimized welding process parameters for 5A06-HX4 alloy sheets are presented.

AB - Optimization of hybrid ultrahigh frequency pulse variable polarity gas tungsten arc welding (HPVP-GTAW) process was carried out to obtain the optimum weld characteristics of 5A06-HX4 aluminum-magnesium alloy sheets of 3 mm thickness. The square butt joints were produced by HPVP-GTAW process, the microstructure and mechanical properties were systematically investigated. It is observed that the process parameters influence the weld microstructure and mechanical properties significantly. Weld microstructure is mainly composed of grid α(Al) solid solution, with a large number of intermetallic β(Mg2Al3) precipitates distributed in the matrix. The amount of β(Mg2Al3) precipitates has an obvious difference with different parameters. Compared with that of the base material, tensile strength of 5A06-HX4 alloy welded joints has a certain reduction, as well as the elongation and reduction of area. The optimized welding process parameters for 5A06-HX4 alloy sheets are presented.

KW - Aluminum alloy

KW - Mechanical property

KW - Ultrahigh frequency pulse current

KW - Variable polarity gas tungsten arc welding

UR - https://www.scopus.com/pages/publications/84924089721

M3 - 文章

AN - SCOPUS:84924089721

SN - 1004-5341

VL - 23

SP - 76

EP - 82

JO - China Welding (English Edition)

JF - China Welding (English Edition)

IS - 4

ER -

Optimization of HPVP-GTAW process parameters for Al-Mg aluminum alloy welded joints

Abstract

Keywords

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