scholarly journals Influence of Shielding Gas on Aluminum Alloy 5083 in Gas Tungsten Arc Welding

2012 ◽  
Vol 29 ◽  
pp. 2465-2469 ◽  
Author(s):  
Prachya Peasura ◽  
Anucha Watanapa
Keyword(s):  
Aluminum Alloy ◽  
Arc Welding ◽  
Gas Tungsten Arc Welding ◽  
Shielding Gas ◽  
Aluminum Alloy 5083 ◽  
Gas Tungsten Arc ◽  
Gas Tungsten

Microstructure Characterization of Pure Tungsten Electrodes Used in Gas Tungsten Arc Welding of Aluminum Alloy

2017 ◽  
Vol 728 ◽  
pp. 91-95
Author(s):  
Kittichai Sojiphan
Keyword(s):  
Aluminum Alloy ◽  
Grain Growth ◽  
Arc Welding ◽  
Gas Tungsten Arc Welding ◽  
Pure Tungsten ◽  
Tungsten Electrode ◽  
Aluminum Alloy 5083 ◽  
Gas Tungsten Arc ◽  
Tungsten Electrodes ◽  
Gas Tungsten

Autogenous gas tungsten arc welding (GTAW) using different non-consumable pure tungsten electrodes (EWP) from eight different manufacturers was performed on aluminum alloy 5083 samples. Due to the limited literatures of how tungsten microstructure may affect the weld quality, this paper attempts to investigate the change in microstructure of tungsten electrode after welding compared to the original microstructure in as-received condition. The scanning electron micrograph results reveal different grain shapes and sizes and also different grain growth rate during welding. It was found that the ability to control the grain growth or limit grain size within the balled end of pure tungsten electrode during aluminum welding plays a very important role in determining the quality of the electrode and how long the electrode would last.

Influence of plasma characteristics on nitrogen mixing into shielding gas in helium gas tungsten arc welding

2014 ◽  
Vol 29 (5) ◽  
pp. 325-333
Author(s):  
Shinji Kodama ◽  
Kazuki Sugiura ◽  
Shota Nakanishi ◽  
Daisuke Sakai ◽  
Yoshihiro Tsujimura ◽  
...  
Keyword(s):  
Arc Welding ◽  
Gas Tungsten Arc Welding ◽  
Shielding Gas ◽  
Gas Tungsten Arc ◽  
Helium Gas ◽  
Plasma Characteristics ◽  
Gas Tungsten

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.

Heating Characteristics of Gas Tungsten Arc Welding of Copper Thick Plates with Shielding Gas of Argon, Helium or Nitrogen

2007 ◽  
Vol 353-358 ◽  
pp. 2096-2099 ◽  
Author(s):  
Jiu Chun Yan ◽  
Yi Nan Li ◽  
Wei Wei Zhao ◽  
Shi Qin Yang
Keyword(s):  
Welded Joints ◽  
Arc Welding ◽  
Gas Tungsten Arc Welding ◽  
Rise Velocity ◽  
Shielding Gas ◽  
Welding Temperature ◽  
Thick Plates ◽  
Gas Tungsten Arc ◽  
Gas Tungsten ◽  
Weld Pools

The welding temperature patterns of gas tungsten arc welding for copper thick plates during Ar, He or N2 shielded arc welding were simulated, and the size of weld pools and heat-affected zones have been compared. It was predicted that the heat-affected zone in the welded joints during Ar arc welding is the widest and that during N2 arc welding is the narrowest, while the size of weld pools using Ar (preheating at 400°C), He and N2 (without preheating) shielding arc welding is very similar. Among the three kinds of gases shielded arc welding, the temperature gradient of welded joints during Ar arc welding is the least and that during N2 arc welding is the greatest. The temperature rise velocity at the arc center during N2 arc welding is the highest, and those at the zone close to the weld pool of welded joints during He arc and N2 arc welding are a few higher than that during Ar arc welding.

scholarly journals Influence of Plasma Characteristics on Nitrogen Mixing into Shielding Gas in Helium Gas Tungsten Arc Welding

2013 ◽  
Vol 31 (1) ◽  
pp. 80-87 ◽  
Author(s):  
Shinji KODAMA ◽  
Kazuki SUGIURA ◽  
Shota NAKANISHI ◽  
Daisuke SAKAI ◽  
Yoshihiro TSUJIMURA ◽  
...  
Keyword(s):  
Arc Welding ◽  
Gas Tungsten Arc Welding ◽  
Shielding Gas ◽  
Gas Tungsten Arc ◽  
Helium Gas ◽  
Plasma Characteristics ◽  
Gas Tungsten
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