The Effect of Wire Feeding Speed on Solidification Cracking of CMT Welding for Al-Si Alloys
In this work, a welding solidification crack sensitivity test platform was established to study the effect of wire feeding speed (WFS) on solidification crack sensitivity during cold metal transfer (CMT) welding for AA6061 aluminum alloy. The test results show that as the WFS increased from 4 m/min...
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MDPI AG
2021-02-01
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| Series: | Metals |
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| Online Access: | https://www.mdpi.com/2075-4701/11/2/267 |
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| author | Lei Huang Xizhang Chen Sergey Konovalov Arshad Noor Siddiquee Gang Lu Xiaoming Pan |
| author_facet | Lei Huang Xizhang Chen Sergey Konovalov Arshad Noor Siddiquee Gang Lu Xiaoming Pan |
| author_sort | Lei Huang |
| collection | DOAJ |
| description | In this work, a welding solidification crack sensitivity test platform was established to study the effect of wire feeding speed (WFS) on solidification crack sensitivity during cold metal transfer (CMT) welding for AA6061 aluminum alloy. The test results show that as the WFS increased from 4 m/min to 5.5 m/min, the sensitivity of the solidification cracks also increased. With a further increase in the value of the WFS, the crack sensitivity decreased and eventually ceased to exist. A new perspective of the microstructure and crack propagation mechanics model was applied to understand the effect of WFS on solidification cracks. With the use of scanning electron microscopy (SEM) and a high-speed camera, it was found that as the WFS increased from 4 m/min to 5.5 m/min, the microstructure of the grain size changed from bigger to smaller, and the stability of the crystal microstructure was reduced. The crack propagation mechanics model was changed, which promotes crack propagation, increasing by 233%. When the WFS continued to increase beyond 5.5 m/min, the size of the crystal structure changed from small to big, the stability of the crystal microstructure was increased, the crack generation was suppressed, and the cracking rate was significantly reduced. |
| first_indexed | 2024-03-09T05:40:21Z |
| format | Article |
| id | doaj.art-93872a79c38146598a402aee1113a75a |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-03-09T05:40:21Z |
| publishDate | 2021-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Metals |
| spelling | doaj.art-93872a79c38146598a402aee1113a75a2023-12-03T12:26:01ZengMDPI AGMetals2075-47012021-02-0111226710.3390/met11020267The Effect of Wire Feeding Speed on Solidification Cracking of CMT Welding for Al-Si AlloysLei Huang0Xizhang Chen1Sergey Konovalov2Arshad Noor Siddiquee3Gang Lu4Xiaoming Pan5Institute of Laser and Optoelectronic Intelligent Manufacturing, Wenzhou University, Wenzhou 325024, ChinaInstitute of Laser and Optoelectronic Intelligent Manufacturing, Wenzhou University, Wenzhou 325024, ChinaInstitute of Laser and Optoelectronic Intelligent Manufacturing, Wenzhou University, Wenzhou 325024, ChinaDepartment of Mechanical Engineering, Jamia Millia Islamia, New Delhi 110025, IndiaSuzhou Fanglin Technology Co., Ltd., High-tech Zone, Suzhou 215151, ChinaInstitute of Laser and Optoelectronic Intelligent Manufacturing, Wenzhou University, Wenzhou 325024, ChinaIn this work, a welding solidification crack sensitivity test platform was established to study the effect of wire feeding speed (WFS) on solidification crack sensitivity during cold metal transfer (CMT) welding for AA6061 aluminum alloy. The test results show that as the WFS increased from 4 m/min to 5.5 m/min, the sensitivity of the solidification cracks also increased. With a further increase in the value of the WFS, the crack sensitivity decreased and eventually ceased to exist. A new perspective of the microstructure and crack propagation mechanics model was applied to understand the effect of WFS on solidification cracks. With the use of scanning electron microscopy (SEM) and a high-speed camera, it was found that as the WFS increased from 4 m/min to 5.5 m/min, the microstructure of the grain size changed from bigger to smaller, and the stability of the crystal microstructure was reduced. The crack propagation mechanics model was changed, which promotes crack propagation, increasing by 233%. When the WFS continued to increase beyond 5.5 m/min, the size of the crystal structure changed from small to big, the stability of the crystal microstructure was increased, the crack generation was suppressed, and the cracking rate was significantly reduced.https://www.mdpi.com/2075-4701/11/2/267weldingAl-Si alloyswire feeding speedsolidification cracking susceptibilitycrystal microstructurepropagation mechanics |
| spellingShingle | Lei Huang Xizhang Chen Sergey Konovalov Arshad Noor Siddiquee Gang Lu Xiaoming Pan The Effect of Wire Feeding Speed on Solidification Cracking of CMT Welding for Al-Si Alloys Metals welding Al-Si alloys wire feeding speed solidification cracking susceptibility crystal microstructure propagation mechanics |
| title | The Effect of Wire Feeding Speed on Solidification Cracking of CMT Welding for Al-Si Alloys |
| title_full | The Effect of Wire Feeding Speed on Solidification Cracking of CMT Welding for Al-Si Alloys |
| title_fullStr | The Effect of Wire Feeding Speed on Solidification Cracking of CMT Welding for Al-Si Alloys |
| title_full_unstemmed | The Effect of Wire Feeding Speed on Solidification Cracking of CMT Welding for Al-Si Alloys |
| title_short | The Effect of Wire Feeding Speed on Solidification Cracking of CMT Welding for Al-Si Alloys |
| title_sort | effect of wire feeding speed on solidification cracking of cmt welding for al si alloys |
| topic | welding Al-Si alloys wire feeding speed solidification cracking susceptibility crystal microstructure propagation mechanics |
| url | https://www.mdpi.com/2075-4701/11/2/267 |
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