Simultaneously enhanced strength and ductility for 3D-printed stainless steel 316L by selective laser melting
Laser-based powder-bed fusion additive manufacturing or three-dimensional printing technology has gained tremendous attention due to its controllable, digital, and automated manufacturing process, which can afford a refined microstructure and superior strength. However, it is a major challenge to ad...
| Main Authors: | , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
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2018
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| Online Access: | https://hdl.handle.net/10356/87771 http://hdl.handle.net/10220/45510 |
| _version_ | 1811685428447674368 |
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| author | Sun, Zhongji Tan, Xipeng Tor, Shu Beng Chua, Chee Kai |
| author2 | School of Mechanical and Aerospace Engineering |
| author_facet | School of Mechanical and Aerospace Engineering Sun, Zhongji Tan, Xipeng Tor, Shu Beng Chua, Chee Kai |
| author_sort | Sun, Zhongji |
| collection | NTU |
| description | Laser-based powder-bed fusion additive manufacturing or three-dimensional printing technology has gained tremendous attention due to its controllable, digital, and automated manufacturing process, which can afford a refined microstructure and superior strength. However, it is a major challenge to additively manufacture metal parts with satisfactory ductility and toughness. Here we report a novel selective laser melting process to simultaneously enhance the strength and ductility of stainless steel 316L by in-process engineering its microstructure into a <011> crystallographic texture. We find that the tensile strength and ductility of SLM-built stainless steel 316L samples could be enhanced by ~16% and ~40% respectively, with the engineered <011> textured microstructure compared to the common <001> textured microstructure. This is because the favorable nano-twinning mechanism was significantly more activated in the <011> textured stainless steel 316L samples during plastic deformation. In addition, kinetic simulations were performed to unveil the relationship between the melt pool geometry and crystallographic texture. The new additive manufacturing strategy of engineering the crystallographic texture can be applied to other metals and alloys with twinning-induced plasticity. This work paves the way to additively manufacture metal parts with high strength and high ductility. |
| first_indexed | 2024-10-01T04:44:22Z |
| format | Journal Article |
| id | ntu-10356/87771 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T04:44:22Z |
| publishDate | 2018 |
| record_format | dspace |
| spelling | ntu-10356/877712023-03-04T17:19:49Z Simultaneously enhanced strength and ductility for 3D-printed stainless steel 316L by selective laser melting Sun, Zhongji Tan, Xipeng Tor, Shu Beng Chua, Chee Kai School of Mechanical and Aerospace Engineering Singapore Centre for 3D Printing Selective Laser Melting 3D Printing Laser-based powder-bed fusion additive manufacturing or three-dimensional printing technology has gained tremendous attention due to its controllable, digital, and automated manufacturing process, which can afford a refined microstructure and superior strength. However, it is a major challenge to additively manufacture metal parts with satisfactory ductility and toughness. Here we report a novel selective laser melting process to simultaneously enhance the strength and ductility of stainless steel 316L by in-process engineering its microstructure into a <011> crystallographic texture. We find that the tensile strength and ductility of SLM-built stainless steel 316L samples could be enhanced by ~16% and ~40% respectively, with the engineered <011> textured microstructure compared to the common <001> textured microstructure. This is because the favorable nano-twinning mechanism was significantly more activated in the <011> textured stainless steel 316L samples during plastic deformation. In addition, kinetic simulations were performed to unveil the relationship between the melt pool geometry and crystallographic texture. The new additive manufacturing strategy of engineering the crystallographic texture can be applied to other metals and alloys with twinning-induced plasticity. This work paves the way to additively manufacture metal parts with high strength and high ductility. NRF (Natl Research Foundation, S’pore) Published version 2018-08-07T05:55:12Z 2019-12-06T16:49:09Z 2018-08-07T05:55:12Z 2019-12-06T16:49:09Z 2018 Journal Article Sun, Z., Tan, X., Tor, S. B., & Chua, C. K. (2018). Simultaneously enhanced strength and ductility for 3D-printed stainless steel 316L by selective laser melting. NPG Asia Materials, 10(4), 127-136. https://hdl.handle.net/10356/87771 http://hdl.handle.net/10220/45510 10.1038/s41427-018-0018-5 en NPG Asia Materials © 2018 The Author(s). This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. 10 p. application/pdf |
| spellingShingle | Selective Laser Melting 3D Printing Sun, Zhongji Tan, Xipeng Tor, Shu Beng Chua, Chee Kai Simultaneously enhanced strength and ductility for 3D-printed stainless steel 316L by selective laser melting |
| title | Simultaneously enhanced strength and ductility for 3D-printed stainless steel 316L by selective laser melting |
| title_full | Simultaneously enhanced strength and ductility for 3D-printed stainless steel 316L by selective laser melting |
| title_fullStr | Simultaneously enhanced strength and ductility for 3D-printed stainless steel 316L by selective laser melting |
| title_full_unstemmed | Simultaneously enhanced strength and ductility for 3D-printed stainless steel 316L by selective laser melting |
| title_short | Simultaneously enhanced strength and ductility for 3D-printed stainless steel 316L by selective laser melting |
| title_sort | simultaneously enhanced strength and ductility for 3d printed stainless steel 316l by selective laser melting |
| topic | Selective Laser Melting 3D Printing |
| url | https://hdl.handle.net/10356/87771 http://hdl.handle.net/10220/45510 |
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