Measurements of Residual Stress and Angular Distortion of 7075 Aluminum Alloy after Gas Tungsten Arc Welding

2013 ◽  
Vol 302 ◽  
pp. 452-456
Author(s):  
Shih Jeh Wu ◽  
Chiao Wei Chung ◽  
Chen Ming Kuo
Keyword(s):  
Residual Stress ◽  
Aluminum Alloy ◽  
Arc Welding ◽  
Imaging System ◽  
Diffraction Method ◽  
Gas Tungsten Arc Welding ◽  
Angular Distortion ◽  
7075 Aluminum Alloy ◽  
Gas Tungsten Arc ◽  
Gas Tungsten

7075 aluminum alloy is one of the most popular materials for structure. There are lots of demands for welding these structural materials. During the fast high temperature heating and cooling process serious residual stress is generated that causes the deterioration of structure strength. In this study, we investigate the residual stress induced in 7075 aluminum alloy after gas tungsten arc welding. X-ray diffraction method is applied to measure the residual stress under different joint angles. The angular distortion is also measured by a 3-D imaging system. Results show that both residual stress and angular distortion increase with the preparation angle.

Study of the Effect of Active Fluxes in Gas Tungsten Arc Welding

2011 ◽  
Vol 189-193 ◽  
pp. 3579-3582
Author(s):  
Jian Hao ◽  
Zhen Luo ◽  
Xian Zheng Bu ◽  
Jian Wu Zhang
Keyword(s):  
Stainless Steel ◽  
Thin Layer ◽  
Arc Welding ◽  
Gas Tungsten Arc Welding ◽  
Steel Plates ◽  
Angular Distortion ◽  
Deep Penetration ◽  
Weld Penetration ◽  
Gas Tungsten Arc ◽  
Gas Tungsten

In order to investigate the effect of active fluxes on weld penetration, angular distortion and weld morphology in gas tungsten arc welding (GTAW), three types of oxide fluxes-CaO, TiO2and Al2O3-were used in the welding of 5mm think stainless steel plates. Those powders were applied through a thin layer of the flux to produce a bead on plate welds. The results showed that compared with conventional TIG welding, increased weld penetration and reduced angular distortion of the weld piece were obtained with the application of active fluxes. However, the weld morphology was not changed significantly when the powders were coated on the surface of steel. It was also found that each of the powders has a fittest range in penetration increment. Whether the rate of the coating run out of the range, the effects of these active fluxes on the increased weld penetration were not obvious. The CaO flux has a narrow effective range for deep penetration, while the Al2O3powder does have no effect on A-TIG penetration. The mechanism of those different performances has not been found out. According to the investment, the mechanism of active fluxes for the increased weld penetration and reduced angular distortion is related to the contraction of the arc.

Welding of Aluminum Alloy by Gas Hollow Tungsten Arc Welding Method in a Vacuum. A Study on Gas Tungsten Arc Welding in Space (Report 2).

1996 ◽  
Vol 14 (4) ◽  
pp. 633-640 ◽  
Author(s):  
Yoshikazu Suita ◽  
Yoshiyuki Tsukuda ◽  
Noboru Terajima ◽  
Hisashi Takahashi ◽  
Masanobu Ogasawara ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Arc Welding ◽  
Gas Tungsten Arc Welding ◽  
Welding Method ◽  
Gas Tungsten Arc ◽  
Gas Tungsten

scholarly journals Residual stress evaluation in API 5L X65 girth welded pipes joined by friction welding and gas tungsten arc welding

2019 ◽  
Vol 8 (1) ◽  
pp. 988-995 ◽  
Author(s):  
Carlos Alexandre Pereira de Moraes ◽  
Mariane Chludzinski ◽  
Rafael Menezes Nunes ◽  
Guilherme Vieira Braga Lemos ◽  
Afonso Reguly
Keyword(s):  
Residual Stress ◽  
Friction Welding ◽  
Arc Welding ◽  
Gas Tungsten Arc Welding ◽  
Stress Evaluation ◽  
Gas Tungsten Arc ◽  
Gas Tungsten
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