Laser ablation behavior subjected to subsonic airflow at different spatial positions
In order to study the interactions between laser energy, surface airflow, spatial position and metal materials in the process of laser ablation, a fluid-structure-coupled laser ablation model considering the combined action of subsonic tangential flow and spatial position of workpiece to induce melt...
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| Format: | Article |
| Language: | zho |
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Editorial Office of Transactions of the China Welding Institution, Welding Journals Publishing House
2025-05-01
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| Series: | Hanjie xuebao |
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| Online Access: | https://doi.org/10.12073/j.hjxb.20240407002 |
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| _version_ | 1849429775381168128 |
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| author | Xiaoying LIU Chenghua WEI Shuyu HUANG Fenggui LU |
| author_facet | Xiaoying LIU Chenghua WEI Shuyu HUANG Fenggui LU |
| author_sort | Xiaoying LIU |
| collection | DOAJ |
| description | In order to study the interactions between laser energy, surface airflow, spatial position and metal materials in the process of laser ablation, a fluid-structure-coupled laser ablation model considering the combined action of subsonic tangential flow and spatial position of workpiece to induce melt removal is proposed, and by comparison with high-speed images, the rationality of the model is verified. The interaction process between surface airflow and large-scale molten pool and melt peeling off behavior are studied at different spatial positions. It is found that induced by the combined action of airflow and spatial position, on one hand, the melt is pushed out of the molten pool to form a tilted liquid column and accelerated to 1.6 m/s or even higher, providing high momentum for the melt to peel away from the molten pool, on the other hand, the liquid column is elongated to be slender to be only 0.45 mm thick, which easily overcome the melt surface tension, causing the melt to peel off and form spatter. Adjusting the metal spatial position and reducing α from 90° to 30°, the component of gravity along the metal surface irradiated by laser is accordingly reduced. The melt flow velocity in the liquid column slows down from 1.6 m/s to 1.4 m/s. The size of ablation crater formed by melt peeling off decreases gradually, and both the peeling-off degree of molten pool and the metal mass loss are reduced significantly. |
| format | Article |
| id | doaj-art-1ebdba2a6ea643a78957ec1456745b27 |
| institution | Kabale University |
| issn | 0253-360X |
| language | zho |
| publishDate | 2025-05-01 |
| publisher | Editorial Office of Transactions of the China Welding Institution, Welding Journals Publishing House |
| record_format | Article |
| series | Hanjie xuebao |
| spelling | doaj-art-1ebdba2a6ea643a78957ec1456745b272025-08-20T03:28:14ZzhoEditorial Office of Transactions of the China Welding Institution, Welding Journals Publishing HouseHanjie xuebao0253-360X2025-05-01465101810.12073/j.hjxb.20240407002hjxb-45-x-liuxiaoyingLaser ablation behavior subjected to subsonic airflow at different spatial positionsXiaoying LIU0Chenghua WEI1Shuyu HUANG2Fenggui LU3School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, ChinaNorthwest Institute of Nuclear Technology, Xi'an, 710024, ChinaSchool of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, ChinaSchool of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, ChinaIn order to study the interactions between laser energy, surface airflow, spatial position and metal materials in the process of laser ablation, a fluid-structure-coupled laser ablation model considering the combined action of subsonic tangential flow and spatial position of workpiece to induce melt removal is proposed, and by comparison with high-speed images, the rationality of the model is verified. The interaction process between surface airflow and large-scale molten pool and melt peeling off behavior are studied at different spatial positions. It is found that induced by the combined action of airflow and spatial position, on one hand, the melt is pushed out of the molten pool to form a tilted liquid column and accelerated to 1.6 m/s or even higher, providing high momentum for the melt to peel away from the molten pool, on the other hand, the liquid column is elongated to be slender to be only 0.45 mm thick, which easily overcome the melt surface tension, causing the melt to peel off and form spatter. Adjusting the metal spatial position and reducing α from 90° to 30°, the component of gravity along the metal surface irradiated by laser is accordingly reduced. The melt flow velocity in the liquid column slows down from 1.6 m/s to 1.4 m/s. The size of ablation crater formed by melt peeling off decreases gradually, and both the peeling-off degree of molten pool and the metal mass loss are reduced significantly.https://doi.org/10.12073/j.hjxb.20240407002laser ablationsubsonic tangential airflowspatial positionlarge-scale molten poolpeeling off behavior |
| spellingShingle | Xiaoying LIU Chenghua WEI Shuyu HUANG Fenggui LU Laser ablation behavior subjected to subsonic airflow at different spatial positions Hanjie xuebao laser ablation subsonic tangential airflow spatial position large-scale molten pool peeling off behavior |
| title | Laser ablation behavior subjected to subsonic airflow at different spatial positions |
| title_full | Laser ablation behavior subjected to subsonic airflow at different spatial positions |
| title_fullStr | Laser ablation behavior subjected to subsonic airflow at different spatial positions |
| title_full_unstemmed | Laser ablation behavior subjected to subsonic airflow at different spatial positions |
| title_short | Laser ablation behavior subjected to subsonic airflow at different spatial positions |
| title_sort | laser ablation behavior subjected to subsonic airflow at different spatial positions |
| topic | laser ablation subsonic tangential airflow spatial position large-scale molten pool peeling off behavior |
| url | https://doi.org/10.12073/j.hjxb.20240407002 |
| work_keys_str_mv | AT xiaoyingliu laserablationbehaviorsubjectedtosubsonicairflowatdifferentspatialpositions AT chenghuawei laserablationbehaviorsubjectedtosubsonicairflowatdifferentspatialpositions AT shuyuhuang laserablationbehaviorsubjectedtosubsonicairflowatdifferentspatialpositions AT fengguilu laserablationbehaviorsubjectedtosubsonicairflowatdifferentspatialpositions |