Study on Laser Polishing of Ti<sub>6</sub>Al<sub>4</sub>V Fabricated by Selective Laser Melting
Laser-based additive manufacturing has garnered significant attention in recent years as a promising 3D-printing method for fabricating metallic components. However, the surface roughness of additive manufactured components has been considered a challenge to achieving high performance. At present, t...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2024-02-01
|
| Series: | Micromachines |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2072-666X/15/3/336 |
| _version_ | 1827305588460093440 |
|---|---|
| author | Shuo Huang Junyong Zeng Wenqi Wang Zhenyu Zhao |
| author_facet | Shuo Huang Junyong Zeng Wenqi Wang Zhenyu Zhao |
| author_sort | Shuo Huang |
| collection | DOAJ |
| description | Laser-based additive manufacturing has garnered significant attention in recent years as a promising 3D-printing method for fabricating metallic components. However, the surface roughness of additive manufactured components has been considered a challenge to achieving high performance. At present, the average surface roughness (Sa) of AM parts can reach high levels, greater than 50 μm, and a maximum distance between the high peaks and the low valleys of more than 300 μm, which requires post machining. Therefore, laser polishing is increasingly being utilized as a method of surface treatment for metal alloys, wherein the rapid remelting and resolidification during the process significantly alter both the surface quality and subsurface material properties. In this paper, the surface roughness, microstructures, microhardness, and wear resistance of the as-received, continuous wave laser polishing (CWLP), and pulsed laser polishing (PLP) processed samples were investigated systematically. The results revealed that the surface roughness (Sa) of the as-received sample was 6.29 μm, which was reduced to 0.94 μm and 0.84 μm by CWLP and PLP processing, respectively. It was also found that a hardened layer, about 200 μm, was produced on the Ti<sub>6</sub>Al<sub>4</sub>V alloy surface after laser polishing, which can improve the mechanical properties of the component. The microhardness of the laser-polished samples was increased to about 482 HV with an improvement of about 25.2% compared with the as-received Ti<sub>6</sub>Al<sub>4</sub>V alloy. Moreover, the coefficient of friction (COF) was slightly reduced by both CWLP and LPL processing, and the wear rate of the surface layer was improved to 0.790 mm<sup>3</sup>/(N∙m) and 0.714 mm<sup>3</sup>/(N∙m), respectively, under dry fraction conditions. |
| first_indexed | 2024-04-24T18:00:38Z |
| format | Article |
| id | doaj.art-93f33b56969149b48ba07782276994a2 |
| institution | Directory Open Access Journal |
| issn | 2072-666X |
| language | English |
| last_indexed | 2024-04-24T18:00:38Z |
| publishDate | 2024-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Micromachines |
| spelling | doaj.art-93f33b56969149b48ba07782276994a22024-03-27T13:55:04ZengMDPI AGMicromachines2072-666X2024-02-0115333610.3390/mi15030336Study on Laser Polishing of Ti<sub>6</sub>Al<sub>4</sub>V Fabricated by Selective Laser MeltingShuo Huang0Junyong Zeng1Wenqi Wang2Zhenyu Zhao3School of Mathematics and Information Engineering, Xinyang Institute of Vocational Technology, Xinyang 464000, ChinaSchool of Sino-German Robitics, Shenzhen Institute of Information Technology, Shenzhen 518172, ChinaSchool of Sino-German Robitics, Shenzhen Institute of Information Technology, Shenzhen 518172, ChinaSchool of Sino-German Robitics, Shenzhen Institute of Information Technology, Shenzhen 518172, ChinaLaser-based additive manufacturing has garnered significant attention in recent years as a promising 3D-printing method for fabricating metallic components. However, the surface roughness of additive manufactured components has been considered a challenge to achieving high performance. At present, the average surface roughness (Sa) of AM parts can reach high levels, greater than 50 μm, and a maximum distance between the high peaks and the low valleys of more than 300 μm, which requires post machining. Therefore, laser polishing is increasingly being utilized as a method of surface treatment for metal alloys, wherein the rapid remelting and resolidification during the process significantly alter both the surface quality and subsurface material properties. In this paper, the surface roughness, microstructures, microhardness, and wear resistance of the as-received, continuous wave laser polishing (CWLP), and pulsed laser polishing (PLP) processed samples were investigated systematically. The results revealed that the surface roughness (Sa) of the as-received sample was 6.29 μm, which was reduced to 0.94 μm and 0.84 μm by CWLP and PLP processing, respectively. It was also found that a hardened layer, about 200 μm, was produced on the Ti<sub>6</sub>Al<sub>4</sub>V alloy surface after laser polishing, which can improve the mechanical properties of the component. The microhardness of the laser-polished samples was increased to about 482 HV with an improvement of about 25.2% compared with the as-received Ti<sub>6</sub>Al<sub>4</sub>V alloy. Moreover, the coefficient of friction (COF) was slightly reduced by both CWLP and LPL processing, and the wear rate of the surface layer was improved to 0.790 mm<sup>3</sup>/(N∙m) and 0.714 mm<sup>3</sup>/(N∙m), respectively, under dry fraction conditions.https://www.mdpi.com/2072-666X/15/3/336Ti<sub>6</sub>Al<sub>4</sub>Vlaser polishingsurface roughnessmicrostructureweardry fraction |
| spellingShingle | Shuo Huang Junyong Zeng Wenqi Wang Zhenyu Zhao Study on Laser Polishing of Ti<sub>6</sub>Al<sub>4</sub>V Fabricated by Selective Laser Melting Micromachines Ti<sub>6</sub>Al<sub>4</sub>V laser polishing surface roughness microstructure wear dry fraction |
| title | Study on Laser Polishing of Ti<sub>6</sub>Al<sub>4</sub>V Fabricated by Selective Laser Melting |
| title_full | Study on Laser Polishing of Ti<sub>6</sub>Al<sub>4</sub>V Fabricated by Selective Laser Melting |
| title_fullStr | Study on Laser Polishing of Ti<sub>6</sub>Al<sub>4</sub>V Fabricated by Selective Laser Melting |
| title_full_unstemmed | Study on Laser Polishing of Ti<sub>6</sub>Al<sub>4</sub>V Fabricated by Selective Laser Melting |
| title_short | Study on Laser Polishing of Ti<sub>6</sub>Al<sub>4</sub>V Fabricated by Selective Laser Melting |
| title_sort | study on laser polishing of ti sub 6 sub al sub 4 sub v fabricated by selective laser melting |
| topic | Ti<sub>6</sub>Al<sub>4</sub>V laser polishing surface roughness microstructure wear dry fraction |
| url | https://www.mdpi.com/2072-666X/15/3/336 |
| work_keys_str_mv | AT shuohuang studyonlaserpolishingoftisub6subalsub4subvfabricatedbyselectivelasermelting AT junyongzeng studyonlaserpolishingoftisub6subalsub4subvfabricatedbyselectivelasermelting AT wenqiwang studyonlaserpolishingoftisub6subalsub4subvfabricatedbyselectivelasermelting AT zhenyuzhao studyonlaserpolishingoftisub6subalsub4subvfabricatedbyselectivelasermelting |