Influence of scanning strategy and building direction on microstructure and corrosion behaviour of selective laser melted 316L stainless steel
In-depth understanding of corrosion behaviour is a key aspect regarding the application of additively manufactured parts. In this study, 316L stainless steel was manufactured under different scanning strategies using selective laser melting (SLM). Microstructure characterization and electrochemical...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2021-11-01
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| Series: | Materials & Design |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0264127521005542 |
| _version_ | 1818652390527598592 |
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| author | Cuiling Zhao Yuchao Bai Yu Zhang Xiaopeng Wang Jun Min Xue Hao Wang |
| author_facet | Cuiling Zhao Yuchao Bai Yu Zhang Xiaopeng Wang Jun Min Xue Hao Wang |
| author_sort | Cuiling Zhao |
| collection | DOAJ |
| description | In-depth understanding of corrosion behaviour is a key aspect regarding the application of additively manufactured parts. In this study, 316L stainless steel was manufactured under different scanning strategies using selective laser melting (SLM). Microstructure characterization and electrochemical tests in NaCl aqueous solution (3.5 wt%), including open circuit potential (OCP), potentiodynamic polarization, and electrochemical impedance spectroscopy (EIS), were conducted to study the influence of scanning strategies on the corrosion behaviour. The microstructure and corrosion on different planes were characterized to reveal the influence of building direction. EBSD analysis shows that the scanning strategy affects the continuity of grain growth through adjacent layers and the growth of grains inside the melt track. Electrochemical tests indicate a clear difference in corrosion resistance perpendicular and parallel to building direction and with different scanning strategies. Pitting corrosion is the main form of corrosion in SLM 316L stainless steel and preferentially initiates on molten pool boundaries. |
| first_indexed | 2024-12-17T02:21:15Z |
| format | Article |
| id | doaj.art-c348e3715c5b4dca91e61e2175169c75 |
| institution | Directory Open Access Journal |
| issn | 0264-1275 |
| language | English |
| last_indexed | 2024-12-17T02:21:15Z |
| publishDate | 2021-11-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Materials & Design |
| spelling | doaj.art-c348e3715c5b4dca91e61e2175169c752022-12-21T22:07:15ZengElsevierMaterials & Design0264-12752021-11-01209109999Influence of scanning strategy and building direction on microstructure and corrosion behaviour of selective laser melted 316L stainless steelCuiling Zhao0Yuchao Bai1Yu Zhang2Xiaopeng Wang3Jun Min Xue4Hao Wang5Department of Mechanical Engineering, Faculty of Engineering, National University of Singapore, 9 Engineering Drive 1, Singapore 117575, SingaporeDepartment of Mechanical Engineering, Faculty of Engineering, National University of Singapore, 9 Engineering Drive 1, Singapore 117575, SingaporeDepartment of Mechanical Engineering, Faculty of Engineering, National University of Singapore, 9 Engineering Drive 1, Singapore 117575, SingaporeDepartment of Materials Science and Engineering, Faculty of Engineering, National University of Singapore, 9 Engineering Drive 1, Singapore 117575, SingaporeDepartment of Materials Science and Engineering, Faculty of Engineering, National University of Singapore, 9 Engineering Drive 1, Singapore 117575, SingaporeDepartment of Mechanical Engineering, Faculty of Engineering, National University of Singapore, 9 Engineering Drive 1, Singapore 117575, Singapore; Corresponding author.In-depth understanding of corrosion behaviour is a key aspect regarding the application of additively manufactured parts. In this study, 316L stainless steel was manufactured under different scanning strategies using selective laser melting (SLM). Microstructure characterization and electrochemical tests in NaCl aqueous solution (3.5 wt%), including open circuit potential (OCP), potentiodynamic polarization, and electrochemical impedance spectroscopy (EIS), were conducted to study the influence of scanning strategies on the corrosion behaviour. The microstructure and corrosion on different planes were characterized to reveal the influence of building direction. EBSD analysis shows that the scanning strategy affects the continuity of grain growth through adjacent layers and the growth of grains inside the melt track. Electrochemical tests indicate a clear difference in corrosion resistance perpendicular and parallel to building direction and with different scanning strategies. Pitting corrosion is the main form of corrosion in SLM 316L stainless steel and preferentially initiates on molten pool boundaries.http://www.sciencedirect.com/science/article/pii/S0264127521005542Selective laser melting316L stainless steelScanning strategyMicrostructureCorrosion |
| spellingShingle | Cuiling Zhao Yuchao Bai Yu Zhang Xiaopeng Wang Jun Min Xue Hao Wang Influence of scanning strategy and building direction on microstructure and corrosion behaviour of selective laser melted 316L stainless steel Materials & Design Selective laser melting 316L stainless steel Scanning strategy Microstructure Corrosion |
| title | Influence of scanning strategy and building direction on microstructure and corrosion behaviour of selective laser melted 316L stainless steel |
| title_full | Influence of scanning strategy and building direction on microstructure and corrosion behaviour of selective laser melted 316L stainless steel |
| title_fullStr | Influence of scanning strategy and building direction on microstructure and corrosion behaviour of selective laser melted 316L stainless steel |
| title_full_unstemmed | Influence of scanning strategy and building direction on microstructure and corrosion behaviour of selective laser melted 316L stainless steel |
| title_short | Influence of scanning strategy and building direction on microstructure and corrosion behaviour of selective laser melted 316L stainless steel |
| title_sort | influence of scanning strategy and building direction on microstructure and corrosion behaviour of selective laser melted 316l stainless steel |
| topic | Selective laser melting 316L stainless steel Scanning strategy Microstructure Corrosion |
| url | http://www.sciencedirect.com/science/article/pii/S0264127521005542 |
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