Laser surface hardening of AISI 1055 steel in water submerged condition
Underwater laser hardening might produce better surface mechanical properties than conventional laser hardening in air due to additional cooling effect by water. However, it has not been studied in detail. This study investigates the effect of water layer on laser surface hardening of AISI 1055 stee...
| Main Authors: | , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2019
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/103473 http://hdl.handle.net/10220/48067 |
| _version_ | 1811677276047147008 |
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| author | Zhou, Wei Zhou, Yu Wu, Naien Maharjan, Niroj |
| author2 | School of Mechanical and Aerospace Engineering |
| author_facet | School of Mechanical and Aerospace Engineering Zhou, Wei Zhou, Yu Wu, Naien Maharjan, Niroj |
| author_sort | Zhou, Wei |
| collection | NTU |
| description | Underwater laser hardening might produce better surface mechanical properties than conventional laser hardening in air due to additional cooling effect by water. However, it has not been studied in detail. This study investigates the effect of water layer on laser surface hardening of AISI 1055 steel. It is found that laser surface hardening is feasible with water layer up to 3 mm above the steel surface. A higher surface hardness is achieved during underwater processing. This is attributed to fast cooling by water which facilitates complete martensitic transformation. Nevertheless, the hardened area is smaller than that in conventional laser hardening in air due to attenuation of laser energy. Above 3 mm, the laser beam is severely attenuated due to formation of vapor plume. Furthermore, it is found that surface oxidation cannot be prevented completely even during underwater treatment, and the water movement results in random distribution of metal slag on the surface. |
| first_indexed | 2024-10-01T02:34:47Z |
| format | Journal Article |
| id | ntu-10356/103473 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T02:34:47Z |
| publishDate | 2019 |
| record_format | dspace |
| spelling | ntu-10356/1034732023-03-04T17:20:07Z Laser surface hardening of AISI 1055 steel in water submerged condition Zhou, Wei Zhou, Yu Wu, Naien Maharjan, Niroj School of Mechanical and Aerospace Engineering Advanced Remanufacturing and Technology Centre Laser Surface Hardening Steel DRNTU::Engineering::Mechanical engineering Underwater laser hardening might produce better surface mechanical properties than conventional laser hardening in air due to additional cooling effect by water. However, it has not been studied in detail. This study investigates the effect of water layer on laser surface hardening of AISI 1055 steel. It is found that laser surface hardening is feasible with water layer up to 3 mm above the steel surface. A higher surface hardness is achieved during underwater processing. This is attributed to fast cooling by water which facilitates complete martensitic transformation. Nevertheless, the hardened area is smaller than that in conventional laser hardening in air due to attenuation of laser energy. Above 3 mm, the laser beam is severely attenuated due to formation of vapor plume. Furthermore, it is found that surface oxidation cannot be prevented completely even during underwater treatment, and the water movement results in random distribution of metal slag on the surface. ASTAR (Agency for Sci., Tech. and Research, S’pore) Accepted version 2019-04-25T05:48:48Z 2019-12-06T21:13:27Z 2019-04-25T05:48:48Z 2019-12-06T21:13:27Z 2019 Journal Article Maharjan, N., Zhou, W., Zhou, Y., & Wu, N. (2019). Laser surface hardening of AISI 1055 steel in water submerged condition. Surface Review and Letters, 1950087-94. doi:10.1142/S0218625X19500872 0218-625X https://hdl.handle.net/10356/103473 http://hdl.handle.net/10220/48067 10.1142/S0218625X19500872 en Surface Review and Letters Electronic version of an article published as Surface Review and Letters, 2019, 1950087-94. https://doi.org/10.1142/S0218625X19500872 @ copyright World Scientific Publishing Company https://www.worldscientific.com/worldscinet/srl 12 p. application/pdf |
| spellingShingle | Laser Surface Hardening Steel DRNTU::Engineering::Mechanical engineering Zhou, Wei Zhou, Yu Wu, Naien Maharjan, Niroj Laser surface hardening of AISI 1055 steel in water submerged condition |
| title | Laser surface hardening of AISI 1055 steel in water submerged condition |
| title_full | Laser surface hardening of AISI 1055 steel in water submerged condition |
| title_fullStr | Laser surface hardening of AISI 1055 steel in water submerged condition |
| title_full_unstemmed | Laser surface hardening of AISI 1055 steel in water submerged condition |
| title_short | Laser surface hardening of AISI 1055 steel in water submerged condition |
| title_sort | laser surface hardening of aisi 1055 steel in water submerged condition |
| topic | Laser Surface Hardening Steel DRNTU::Engineering::Mechanical engineering |
| url | https://hdl.handle.net/10356/103473 http://hdl.handle.net/10220/48067 |
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