Observation of Vapor Plume Behavior and Process Stability at Single-Track and Multi-Track Levels in Laser Powder Bed Fusion Regime
Laser powder bed fusion (LPBF) is a promising additive manufacturing technology for producing metal parts with complex geometric features. However, the issue concerning process stability and repeatability still hinders its future acceptance by the industry. Gaining a better understanding of the beha...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-06-01
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| Series: | Metals |
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| Online Access: | https://www.mdpi.com/2075-4701/11/6/937 |
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| author | Hang Zheng You Wang Yinkai Xie Shengkun Yang Rui Hou Yulong Ge Lihui Lang Shuili Gong Huaixue Li |
| author_facet | Hang Zheng You Wang Yinkai Xie Shengkun Yang Rui Hou Yulong Ge Lihui Lang Shuili Gong Huaixue Li |
| author_sort | Hang Zheng |
| collection | DOAJ |
| description | Laser powder bed fusion (LPBF) is a promising additive manufacturing technology for producing metal parts with complex geometric features. However, the issue concerning process stability and repeatability still hinders its future acceptance by the industry. Gaining a better understanding of the behavior and stability of the evaporation process is an important step towards further insights into the complex interaction between laser and material. In this study, we used off-axis high-speed camera to observe vapor plume evolution in single-track formation on bare Ti-6Al-4V plates; the results showed that evaporation has a strong effect on melting quality even if the keyhole is not developed. We then expanded the experiments to multi-track level and found that the melting mode can change as the result of heat accumulation. The results show the possibility that keyhole regime may be reached even if it starts with a combination of parameters below the threshold for keyhole formation in single-track-level observation. |
| first_indexed | 2024-03-10T10:35:05Z |
| format | Article |
| id | doaj.art-4e455bcd0b1442439b731f3d1fe9c122 |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-03-10T10:35:05Z |
| publishDate | 2021-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Metals |
| spelling | doaj.art-4e455bcd0b1442439b731f3d1fe9c1222023-11-21T23:23:00ZengMDPI AGMetals2075-47012021-06-0111693710.3390/met11060937Observation of Vapor Plume Behavior and Process Stability at Single-Track and Multi-Track Levels in Laser Powder Bed Fusion RegimeHang Zheng0You Wang1Yinkai Xie2Shengkun Yang3Rui Hou4Yulong Ge5Lihui Lang6Shuili Gong7Huaixue Li8School of Mechanical Engineering and Automation, Beihang University, Beijing 100191, ChinaSchool of Mechanical Engineering and Automation, Beihang University, Beijing 100191, ChinaScience and Technology on Power Beam Processes Laboratory, AVIC Manufacturing Technology Institute, Beijing 100024, ChinaScience and Technology on Power Beam Processes Laboratory, AVIC Manufacturing Technology Institute, Beijing 100024, ChinaSchool of Mechanical Engineering and Automation, Beihang University, Beijing 100191, ChinaSuzhou Automotive Research Institute, Tsinghua University, Suzhou 215134, ChinaSchool of Mechanical Engineering and Automation, Beihang University, Beijing 100191, ChinaScience and Technology on Power Beam Processes Laboratory, AVIC Manufacturing Technology Institute, Beijing 100024, ChinaScience and Technology on Power Beam Processes Laboratory, AVIC Manufacturing Technology Institute, Beijing 100024, ChinaLaser powder bed fusion (LPBF) is a promising additive manufacturing technology for producing metal parts with complex geometric features. However, the issue concerning process stability and repeatability still hinders its future acceptance by the industry. Gaining a better understanding of the behavior and stability of the evaporation process is an important step towards further insights into the complex interaction between laser and material. In this study, we used off-axis high-speed camera to observe vapor plume evolution in single-track formation on bare Ti-6Al-4V plates; the results showed that evaporation has a strong effect on melting quality even if the keyhole is not developed. We then expanded the experiments to multi-track level and found that the melting mode can change as the result of heat accumulation. The results show the possibility that keyhole regime may be reached even if it starts with a combination of parameters below the threshold for keyhole formation in single-track-level observation.https://www.mdpi.com/2075-4701/11/6/937laser material interactionhigh-speed observationvapor plume behaviormelting mode transitionprocess stability |
| spellingShingle | Hang Zheng You Wang Yinkai Xie Shengkun Yang Rui Hou Yulong Ge Lihui Lang Shuili Gong Huaixue Li Observation of Vapor Plume Behavior and Process Stability at Single-Track and Multi-Track Levels in Laser Powder Bed Fusion Regime Metals laser material interaction high-speed observation vapor plume behavior melting mode transition process stability |
| title | Observation of Vapor Plume Behavior and Process Stability at Single-Track and Multi-Track Levels in Laser Powder Bed Fusion Regime |
| title_full | Observation of Vapor Plume Behavior and Process Stability at Single-Track and Multi-Track Levels in Laser Powder Bed Fusion Regime |
| title_fullStr | Observation of Vapor Plume Behavior and Process Stability at Single-Track and Multi-Track Levels in Laser Powder Bed Fusion Regime |
| title_full_unstemmed | Observation of Vapor Plume Behavior and Process Stability at Single-Track and Multi-Track Levels in Laser Powder Bed Fusion Regime |
| title_short | Observation of Vapor Plume Behavior and Process Stability at Single-Track and Multi-Track Levels in Laser Powder Bed Fusion Regime |
| title_sort | observation of vapor plume behavior and process stability at single track and multi track levels in laser powder bed fusion regime |
| topic | laser material interaction high-speed observation vapor plume behavior melting mode transition process stability |
| url | https://www.mdpi.com/2075-4701/11/6/937 |
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