Enhancing the surface strength of magnesium alloy AZ80 through cavitation peening
In this study, the effects of cavitation peening on the surface properties of artificially aged Mg alloy AZ80 are investigated, focusing on surface roughness, microhardness, residual stresses and microstructure. The analysis by optical microscopy, scanning electron microscopy and backscattered elect...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-07-01
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| Series: | Materials & Design |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S0264127525006495 |
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| author | Sebastjan Žagar Hitoshi Soyama Boštjan Markoli Iztok Naglič Roman Šturm |
| author_facet | Sebastjan Žagar Hitoshi Soyama Boštjan Markoli Iztok Naglič Roman Šturm |
| author_sort | Sebastjan Žagar |
| collection | DOAJ |
| description | In this study, the effects of cavitation peening on the surface properties of artificially aged Mg alloy AZ80 are investigated, focusing on surface roughness, microhardness, residual stresses and microstructure. The analysis by optical microscopy, scanning electron microscopy and backscattered electron diffraction shows that roughness, hardness and modified depth increase with increasing number of cavitation peening scans. The surface roughness (Ra) increased from 0.2 μm in the base material to 5.6 μm after cavitation peening of 20 scans (CP-20). The microhardness also increased from 80 HV0.05 to 112 HV0.05 at the same specimen. The compressive residual stresses improved from −10 MPa in the base material to −220 MPa after 5 scans (CP-5). With further increasing number of scans, residual stresses decreased to −20 MPa at 20 scans (CP-20). The microstructural analysis revealed that the increased occurrence of twins under the peened surface correlates with the decrease in compressive residual stresses. This indicates that excessive cavitation peening leads to twin formation and compressive stress loss. Therefore, limiting the number of scans is crucial for maintaining high compressive residual stresses level. At this point, the optimum number of cavitation peening scans for the material used has been suggested. |
| format | Article |
| id | doaj-art-9d9d03e48e7048368936117f9f22879a |
| institution | Kabale University |
| issn | 0264-1275 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Materials & Design |
| spelling | doaj-art-9d9d03e48e7048368936117f9f22879a2025-08-20T03:30:47ZengElsevierMaterials & Design0264-12752025-07-0125511422910.1016/j.matdes.2025.114229Enhancing the surface strength of magnesium alloy AZ80 through cavitation peeningSebastjan Žagar0Hitoshi Soyama1Boštjan Markoli2Iztok Naglič3Roman Šturm4Faculty of Mechanical Engineering, Aškerčeva 6, 1000 Ljubljana, SloveniaDepartment of Finemechanics, Tohoku University, Sendai 980-8579, JapanFaculty of Natural Sciences and Engineering, Aškerčeva 12, 1000 Ljubljana, SloveniaFaculty of Natural Sciences and Engineering, Aškerčeva 12, 1000 Ljubljana, SloveniaFaculty of Mechanical Engineering, Aškerčeva 6, 1000 Ljubljana, Slovenia; Corresponding author.In this study, the effects of cavitation peening on the surface properties of artificially aged Mg alloy AZ80 are investigated, focusing on surface roughness, microhardness, residual stresses and microstructure. The analysis by optical microscopy, scanning electron microscopy and backscattered electron diffraction shows that roughness, hardness and modified depth increase with increasing number of cavitation peening scans. The surface roughness (Ra) increased from 0.2 μm in the base material to 5.6 μm after cavitation peening of 20 scans (CP-20). The microhardness also increased from 80 HV0.05 to 112 HV0.05 at the same specimen. The compressive residual stresses improved from −10 MPa in the base material to −220 MPa after 5 scans (CP-5). With further increasing number of scans, residual stresses decreased to −20 MPa at 20 scans (CP-20). The microstructural analysis revealed that the increased occurrence of twins under the peened surface correlates with the decrease in compressive residual stresses. This indicates that excessive cavitation peening leads to twin formation and compressive stress loss. Therefore, limiting the number of scans is crucial for maintaining high compressive residual stresses level. At this point, the optimum number of cavitation peening scans for the material used has been suggested.http://www.sciencedirect.com/science/article/pii/S0264127525006495Magnesium alloy AZ80MicrostructureCavitation peeningResidual stressesMicrohardnessTwinning |
| spellingShingle | Sebastjan Žagar Hitoshi Soyama Boštjan Markoli Iztok Naglič Roman Šturm Enhancing the surface strength of magnesium alloy AZ80 through cavitation peening Materials & Design Magnesium alloy AZ80 Microstructure Cavitation peening Residual stresses Microhardness Twinning |
| title | Enhancing the surface strength of magnesium alloy AZ80 through cavitation peening |
| title_full | Enhancing the surface strength of magnesium alloy AZ80 through cavitation peening |
| title_fullStr | Enhancing the surface strength of magnesium alloy AZ80 through cavitation peening |
| title_full_unstemmed | Enhancing the surface strength of magnesium alloy AZ80 through cavitation peening |
| title_short | Enhancing the surface strength of magnesium alloy AZ80 through cavitation peening |
| title_sort | enhancing the surface strength of magnesium alloy az80 through cavitation peening |
| topic | Magnesium alloy AZ80 Microstructure Cavitation peening Residual stresses Microhardness Twinning |
| url | http://www.sciencedirect.com/science/article/pii/S0264127525006495 |
| work_keys_str_mv | AT sebastjanzagar enhancingthesurfacestrengthofmagnesiumalloyaz80throughcavitationpeening AT hitoshisoyama enhancingthesurfacestrengthofmagnesiumalloyaz80throughcavitationpeening AT bostjanmarkoli enhancingthesurfacestrengthofmagnesiumalloyaz80throughcavitationpeening AT iztoknaglic enhancingthesurfacestrengthofmagnesiumalloyaz80throughcavitationpeening AT romansturm enhancingthesurfacestrengthofmagnesiumalloyaz80throughcavitationpeening |