Laser Shock Peening of Ti6Al4V Alloy with Combined Nanosecond and Femtosecond Laser Pulses
Laser shock peening (LSP) with nanosecond or femtosecond laser pulses is applied to improve the mechanical properties of metallic materials. Thus, it is necessary to compare the effects of different processing methods on microstructure changes and property improvement. In this study, nanosecond LSP...
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MDPI AG
2021-12-01
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| Series: | Metals |
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| Online Access: | https://www.mdpi.com/2075-4701/12/1/26 |
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| author | Rujian Sun Guangzhi He Hailin Bai Jianfeng Yan Wei Guo |
| author_facet | Rujian Sun Guangzhi He Hailin Bai Jianfeng Yan Wei Guo |
| author_sort | Rujian Sun |
| collection | DOAJ |
| description | Laser shock peening (LSP) with nanosecond or femtosecond laser pulses is applied to improve the mechanical properties of metallic materials. Thus, it is necessary to compare the effects of different processing methods on microstructure changes and property improvement. In this study, nanosecond LSP (NLSP), femtosecond LSP (FLSP), and LSP with combined nanosecond and femtosecond laser pulses (F-NLSP) are conducted on Ti6Al4V alloys to compare the surface morphologies, in-depth microstructures, and nanohardness changes. In FLSP, the peened surface is smooth, and the affected depth is limited near the peened surface. NLSPed and F-NLSPed samples present rough surfaces due to the severe ablation process. Small equiaxed grains with no preferred grain orientation are denser in F-NLSPed samples than that in NLSPed samples. Compared with NLSPed samples, the affected depth and amplitude of in-depth nanohardness are larger in F-NLSPed samples. This is attributed to the increased laser absorption of incident laser on the treated surface by femtosecond laser pulses. The results in this study show the effects of different LSP methods and provide chances in engineering potentials for material property improvements. |
| first_indexed | 2024-03-10T00:58:12Z |
| format | Article |
| id | doaj.art-ec63d2aceb844d4aa4baab1f498d271e |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-03-10T00:58:12Z |
| publishDate | 2021-12-01 |
| publisher | MDPI AG |
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| series | Metals |
| spelling | doaj.art-ec63d2aceb844d4aa4baab1f498d271e2023-11-23T14:41:11ZengMDPI AGMetals2075-47012021-12-011212610.3390/met12010026Laser Shock Peening of Ti6Al4V Alloy with Combined Nanosecond and Femtosecond Laser PulsesRujian Sun0Guangzhi He1Hailin Bai2Jianfeng Yan3Wei Guo4Aviation Key Laboratory of Science and Technology on Advanced Surface Engineering, AVIC Manufacturing Technology Institute, Beijing 100024, ChinaState Key Laboratory of Tribology, Department of Mechanical Engineering, Tsinghua University, Beijing 100084, ChinaState Key Laboratory of Tribology, Department of Mechanical Engineering, Tsinghua University, Beijing 100084, ChinaState Key Laboratory of Tribology, Department of Mechanical Engineering, Tsinghua University, Beijing 100084, ChinaSchool of Mechanical Engineering and Automation, Beihang University, Beijing 100191, ChinaLaser shock peening (LSP) with nanosecond or femtosecond laser pulses is applied to improve the mechanical properties of metallic materials. Thus, it is necessary to compare the effects of different processing methods on microstructure changes and property improvement. In this study, nanosecond LSP (NLSP), femtosecond LSP (FLSP), and LSP with combined nanosecond and femtosecond laser pulses (F-NLSP) are conducted on Ti6Al4V alloys to compare the surface morphologies, in-depth microstructures, and nanohardness changes. In FLSP, the peened surface is smooth, and the affected depth is limited near the peened surface. NLSPed and F-NLSPed samples present rough surfaces due to the severe ablation process. Small equiaxed grains with no preferred grain orientation are denser in F-NLSPed samples than that in NLSPed samples. Compared with NLSPed samples, the affected depth and amplitude of in-depth nanohardness are larger in F-NLSPed samples. This is attributed to the increased laser absorption of incident laser on the treated surface by femtosecond laser pulses. The results in this study show the effects of different LSP methods and provide chances in engineering potentials for material property improvements.https://www.mdpi.com/2075-4701/12/1/26Ti6Al4V alloylaser shock peeningfemtosecond lasernanosecond lasermicrostructurenanohardness |
| spellingShingle | Rujian Sun Guangzhi He Hailin Bai Jianfeng Yan Wei Guo Laser Shock Peening of Ti6Al4V Alloy with Combined Nanosecond and Femtosecond Laser Pulses Metals Ti6Al4V alloy laser shock peening femtosecond laser nanosecond laser microstructure nanohardness |
| title | Laser Shock Peening of Ti6Al4V Alloy with Combined Nanosecond and Femtosecond Laser Pulses |
| title_full | Laser Shock Peening of Ti6Al4V Alloy with Combined Nanosecond and Femtosecond Laser Pulses |
| title_fullStr | Laser Shock Peening of Ti6Al4V Alloy with Combined Nanosecond and Femtosecond Laser Pulses |
| title_full_unstemmed | Laser Shock Peening of Ti6Al4V Alloy with Combined Nanosecond and Femtosecond Laser Pulses |
| title_short | Laser Shock Peening of Ti6Al4V Alloy with Combined Nanosecond and Femtosecond Laser Pulses |
| title_sort | laser shock peening of ti6al4v alloy with combined nanosecond and femtosecond laser pulses |
| topic | Ti6Al4V alloy laser shock peening femtosecond laser nanosecond laser microstructure nanohardness |
| url | https://www.mdpi.com/2075-4701/12/1/26 |
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