Numerical Analysis of Keyhole and Weld Pool Behaviors in Ultrasonic-Assisted Plasma Arc Welding Process
The acoustic radiation force driving the plasma jet and the ultrasound reflection at the plasma arc-weld pool interface are considered to modify the formulas of gas shear stress and plasma arc pressure on the anode surface in ultrasonic-assisted plasma arc welding (U-PAW). A transient model taking i...
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| Format: | Article |
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MDPI AG
2021-02-01
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| Online Access: | https://www.mdpi.com/1996-1944/14/3/703 |
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| author | Junnan Qiao Chuansong Wu Yongfeng Li |
| author_facet | Junnan Qiao Chuansong Wu Yongfeng Li |
| author_sort | Junnan Qiao |
| collection | DOAJ |
| description | The acoustic radiation force driving the plasma jet and the ultrasound reflection at the plasma arc-weld pool interface are considered to modify the formulas of gas shear stress and plasma arc pressure on the anode surface in ultrasonic-assisted plasma arc welding (U-PAW). A transient model taking into account the dynamic changes of heat flux, gas shear stress, and arc pressure on the keyhole wall is developed. The keyhole and weld pool behaviors are numerically simulated to predict the heat transfer and fluid flow in the weld pool and dynamic keyhole evolution process. The model is experimentally validated. The simulation results show that the acoustic radiation force increases the plasma arc velocity, and then increases both the plasma arc pressure and the gas shear stress on the keyhole wall, so that the keyholing capability is enhanced in U-PAW. |
| first_indexed | 2024-03-09T06:01:07Z |
| format | Article |
| id | doaj.art-4bfa0bc16cfd4391b8298b4919797c20 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-09T06:01:07Z |
| publishDate | 2021-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-4bfa0bc16cfd4391b8298b4919797c202023-12-03T12:09:07ZengMDPI AGMaterials1996-19442021-02-0114370310.3390/ma14030703Numerical Analysis of Keyhole and Weld Pool Behaviors in Ultrasonic-Assisted Plasma Arc Welding ProcessJunnan Qiao0Chuansong Wu1Yongfeng Li2MOE Key Lab for Liquid-Solid Structure Evolution and Materials Processing, Institute of Materials Joining, Shandong University, Jinan 250061, ChinaMOE Key Lab for Liquid-Solid Structure Evolution and Materials Processing, Institute of Materials Joining, Shandong University, Jinan 250061, ChinaMOE Key Lab for Liquid-Solid Structure Evolution and Materials Processing, Institute of Materials Joining, Shandong University, Jinan 250061, ChinaThe acoustic radiation force driving the plasma jet and the ultrasound reflection at the plasma arc-weld pool interface are considered to modify the formulas of gas shear stress and plasma arc pressure on the anode surface in ultrasonic-assisted plasma arc welding (U-PAW). A transient model taking into account the dynamic changes of heat flux, gas shear stress, and arc pressure on the keyhole wall is developed. The keyhole and weld pool behaviors are numerically simulated to predict the heat transfer and fluid flow in the weld pool and dynamic keyhole evolution process. The model is experimentally validated. The simulation results show that the acoustic radiation force increases the plasma arc velocity, and then increases both the plasma arc pressure and the gas shear stress on the keyhole wall, so that the keyholing capability is enhanced in U-PAW.https://www.mdpi.com/1996-1944/14/3/703plasma arc weldingacoustic radiation forceplasma arc pressuregas shear stressweld poolkeyhole behavior |
| spellingShingle | Junnan Qiao Chuansong Wu Yongfeng Li Numerical Analysis of Keyhole and Weld Pool Behaviors in Ultrasonic-Assisted Plasma Arc Welding Process Materials plasma arc welding acoustic radiation force plasma arc pressure gas shear stress weld pool keyhole behavior |
| title | Numerical Analysis of Keyhole and Weld Pool Behaviors in Ultrasonic-Assisted Plasma Arc Welding Process |
| title_full | Numerical Analysis of Keyhole and Weld Pool Behaviors in Ultrasonic-Assisted Plasma Arc Welding Process |
| title_fullStr | Numerical Analysis of Keyhole and Weld Pool Behaviors in Ultrasonic-Assisted Plasma Arc Welding Process |
| title_full_unstemmed | Numerical Analysis of Keyhole and Weld Pool Behaviors in Ultrasonic-Assisted Plasma Arc Welding Process |
| title_short | Numerical Analysis of Keyhole and Weld Pool Behaviors in Ultrasonic-Assisted Plasma Arc Welding Process |
| title_sort | numerical analysis of keyhole and weld pool behaviors in ultrasonic assisted plasma arc welding process |
| topic | plasma arc welding acoustic radiation force plasma arc pressure gas shear stress weld pool keyhole behavior |
| url | https://www.mdpi.com/1996-1944/14/3/703 |
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