Cavitation Erosion Characteristics of the EN AW-6082 Aluminum Alloy by TIG Surface Remelting
Components made of aluminum alloys operating under cavitation erosion conditions have low performance and therefore a reduced lifetime. The degradation of these components is a consequence of the repetitive implosion of cavitation bubbles adjacent to the solid surface. In this paper, the effect of t...
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| author | Ion Mitelea Ilare Bordeașu Florin Frant Ion-Dragoș Uțu Corneliu Marius Crăciunescu Cristian Ghera |
| author_facet | Ion Mitelea Ilare Bordeașu Florin Frant Ion-Dragoș Uțu Corneliu Marius Crăciunescu Cristian Ghera |
| author_sort | Ion Mitelea |
| collection | DOAJ |
| description | Components made of aluminum alloys operating under cavitation erosion conditions have low performance and therefore a reduced lifetime. The degradation of these components is a consequence of the repetitive implosion of cavitation bubbles adjacent to the solid surface. In this paper, the effect of the rapid re-melting and solidification modification of the surface microstructure of parts of an Al-based alloy strengthened by artificial ageing on the reduction of material loss through cavitation erosion was investigated. The heat source used was the electric arc generated between a tungsten electrode and the workpiece (i.e., TIG). Local surface melting was performed at different values of linear energy (El = 6600–15840 J/cm), varying the current between 100 A and 200 A, at a constant voltage of 10 V. The obtained results showed an increase in the surface microhardness at values of 129–137 HV0.05 and a decrease in the erosion rate from 0.50 µm/min, characteristic of the artificial ageing heat treatment, to 0.10–0.32 µm/min, specific to TIG re-melted layers. For the study of the cavitational erosion mechanism, investigations were carried out by optical microscopy and scanning electron microscopy. The results showed that the improvement of the cavitational erosion resistance by surface melting was a consequence of the increase in microstructural homogeneity and grains refinement. |
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| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-11T05:32:54Z |
| publishDate | 2023-03-01 |
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| spelling | doaj.art-82f66ab47af34a82917f848d20fc3d7d2023-11-17T17:01:47ZengMDPI AGMaterials1996-19442023-03-01167256310.3390/ma16072563Cavitation Erosion Characteristics of the EN AW-6082 Aluminum Alloy by TIG Surface RemeltingIon Mitelea0Ilare Bordeașu1Florin Frant2Ion-Dragoș Uțu3Corneliu Marius Crăciunescu4Cristian Ghera5Department of Materials and Fabrication Engineering, Politehnica University Timisoara, Bulevardul Mihai Viteazul nr.1, 300222 Timisoara, RomaniaDepartment of Mechanical Machines, Equipment and Transports, Politehnica University Timisoara, Bulevardul Mihai Viteazul nr.1, 300222 Timisoara, RomaniaDepartment of Materials and Fabrication Engineering, Politehnica University Timisoara, Bulevardul Mihai Viteazul nr.1, 300222 Timisoara, RomaniaDepartment of Materials and Fabrication Engineering, Politehnica University Timisoara, Bulevardul Mihai Viteazul nr.1, 300222 Timisoara, RomaniaDepartment of Materials and Fabrication Engineering, Politehnica University Timisoara, Bulevardul Mihai Viteazul nr.1, 300222 Timisoara, RomaniaDepartment of Mechanical Machines, Equipment and Transports, Politehnica University Timisoara, Bulevardul Mihai Viteazul nr.1, 300222 Timisoara, RomaniaComponents made of aluminum alloys operating under cavitation erosion conditions have low performance and therefore a reduced lifetime. The degradation of these components is a consequence of the repetitive implosion of cavitation bubbles adjacent to the solid surface. In this paper, the effect of the rapid re-melting and solidification modification of the surface microstructure of parts of an Al-based alloy strengthened by artificial ageing on the reduction of material loss through cavitation erosion was investigated. The heat source used was the electric arc generated between a tungsten electrode and the workpiece (i.e., TIG). Local surface melting was performed at different values of linear energy (El = 6600–15840 J/cm), varying the current between 100 A and 200 A, at a constant voltage of 10 V. The obtained results showed an increase in the surface microhardness at values of 129–137 HV0.05 and a decrease in the erosion rate from 0.50 µm/min, characteristic of the artificial ageing heat treatment, to 0.10–0.32 µm/min, specific to TIG re-melted layers. For the study of the cavitational erosion mechanism, investigations were carried out by optical microscopy and scanning electron microscopy. The results showed that the improvement of the cavitational erosion resistance by surface melting was a consequence of the increase in microstructural homogeneity and grains refinement.https://www.mdpi.com/1996-1944/16/7/2563TIG remeltingaluminum alloycavitation erosion |
| spellingShingle | Ion Mitelea Ilare Bordeașu Florin Frant Ion-Dragoș Uțu Corneliu Marius Crăciunescu Cristian Ghera Cavitation Erosion Characteristics of the EN AW-6082 Aluminum Alloy by TIG Surface Remelting Materials TIG remelting aluminum alloy cavitation erosion |
| title | Cavitation Erosion Characteristics of the EN AW-6082 Aluminum Alloy by TIG Surface Remelting |
| title_full | Cavitation Erosion Characteristics of the EN AW-6082 Aluminum Alloy by TIG Surface Remelting |
| title_fullStr | Cavitation Erosion Characteristics of the EN AW-6082 Aluminum Alloy by TIG Surface Remelting |
| title_full_unstemmed | Cavitation Erosion Characteristics of the EN AW-6082 Aluminum Alloy by TIG Surface Remelting |
| title_short | Cavitation Erosion Characteristics of the EN AW-6082 Aluminum Alloy by TIG Surface Remelting |
| title_sort | cavitation erosion characteristics of the en aw 6082 aluminum alloy by tig surface remelting |
| topic | TIG remelting aluminum alloy cavitation erosion |
| url | https://www.mdpi.com/1996-1944/16/7/2563 |
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