Modification of cold sprayed CoCrMo alloy coatings via laser shock peening
Modification of cold sprayed CoCrMo alloy coatings via laser shock peening
In this study, CoCrMo alloy coatings were fabricated by high pressure cold spray deposition. Laser shock peening with and without an ablative layer was applied to the coatings. The microstructure characteristics and mechanical properties of the both as-sprayed and laser shock peened CoCrMo coatings were systematically investigated. Laser shock peening without a protective overlay resulted in both mechanical and thermal loading of the coatings, leading to melting and solidification of the outermost surfaces of the coatings along with deformation. For comparison, laser shock peening with a polyvinyl tape as sacrificial layer was also applied to the as-sprayed CoCrMo coatings. It was found that this sacrificial layer could protect the samples from thermal effects and introduce a deep compressive residual stress in the coatings, which resulted in cracks in the coating. Those cracks in the coatings appeared to be continuous and parallel to the coating/substrate interface due to the strong shock wave imposed during the laser peening process.
CoCrMo alloy coating, High pressure cold spray, Laser shock peening, Mechanical properties, Microstructure
185-188
Sun, Wen
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Maharjan, Niroj
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Wu, Kaiqiang
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Tan, Adrian Wei Yee
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Huang, Renzhong
8d6fbf56-aa9e-4d78-9881-76f5734b7c51
Xie, Yingchun
4c054d60-da06-4381-948a-681239f70992
Lan, Haiming
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Chu, Xin
ecd7059d-578b-4650-b64c-6d2318c31e74
Liu, Erjia
f0eb8f01-7079-4d8a-9687-f00250b31ffd
September 2022
Sun, Wen
38403bb0-2b99-4958-b9ee-39b4016d0968
Maharjan, Niroj
8f56c874-1097-4afe-bd33-16e66c85a13d
Wu, Kaiqiang
0a556f8f-8f7c-42ad-b49c-19dce848914c
Tan, Adrian Wei Yee
3d644676-a520-4f41-b7f1-410d1c46689d
Huang, Renzhong
8d6fbf56-aa9e-4d78-9881-76f5734b7c51
Xie, Yingchun
4c054d60-da06-4381-948a-681239f70992
Lan, Haiming
e5c39d29-763d-4945-a0bf-2ac5480192fc
Chu, Xin
ecd7059d-578b-4650-b64c-6d2318c31e74
Liu, Erjia
f0eb8f01-7079-4d8a-9687-f00250b31ffd
Sun, Wen, Maharjan, Niroj, Wu, Kaiqiang, Tan, Adrian Wei Yee, Huang, Renzhong, Xie, Yingchun, Lan, Haiming, Chu, Xin and Liu, Erjia
(2022)
Modification of cold sprayed CoCrMo alloy coatings via laser shock peening.
Wei, Yuefan and Chng, Shuyun
(eds.)
In Proceedings of the 2nd International Conference on Advanced Surface Enhancement, INCASE 2021 - Innovation Leading to Industrialization.
Springer Singapore.
.
(doi:10.1007/978-981-16-5763-4_41).
Record type:
Conference or Workshop Item
(Paper)
Abstract
In this study, CoCrMo alloy coatings were fabricated by high pressure cold spray deposition. Laser shock peening with and without an ablative layer was applied to the coatings. The microstructure characteristics and mechanical properties of the both as-sprayed and laser shock peened CoCrMo coatings were systematically investigated. Laser shock peening without a protective overlay resulted in both mechanical and thermal loading of the coatings, leading to melting and solidification of the outermost surfaces of the coatings along with deformation. For comparison, laser shock peening with a polyvinyl tape as sacrificial layer was also applied to the as-sprayed CoCrMo coatings. It was found that this sacrificial layer could protect the samples from thermal effects and introduce a deep compressive residual stress in the coatings, which resulted in cracks in the coating. Those cracks in the coatings appeared to be continuous and parallel to the coating/substrate interface due to the strong shock wave imposed during the laser peening process.
Text
978-981-16-5763-4_41
- Version of Record
More information
Published date: September 2022
Additional Information:
Funding Information:
Acknowledgements. This work was supported by Guangdong Province Key Area Research Grant: 2020B0101330001. Portions of the work were performed as part of collaborative research project (FYP B180–2019) between Advanced Remanufacturing Technology Centre (ARTC) and Nanyang Technological University (NTU), Singapore.
Funding Information:
This work was supported by Guangdong Province Key Area Research Grant: 2020B0101330001. Portions of the work were performed as part of collaborative research project (FYP B180–2019) between Advanced Remanufacturing Technology Centre (ARTC) and Nanyang Technological University (NTU), Singapore.
Publisher Copyright:
© 2022, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.
Venue - Dates:
2nd International Conference on Advanced Surface Enhancement, INCASE 2021, , Virtual, Online, 2021-09-07 - 2021-09-08
Keywords:
CoCrMo alloy coating, High pressure cold spray, Laser shock peening, Mechanical properties, Microstructure
Identifiers
Local EPrints ID: 474378
URI: http://eprints.soton.ac.uk/id/eprint/474378
ISSN: 2195-4356
PURE UUID: 241062a3-1e65-44be-b819-3b5e6975a53b
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Date deposited: 21 Feb 2023 17:37
Last modified: 17 Mar 2024 13:14
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Contributors
Author:
Wen Sun
Author:
Niroj Maharjan
Author:
Kaiqiang Wu
Author:
Adrian Wei Yee Tan
Author:
Renzhong Huang
Author:
Yingchun Xie
Author:
Haiming Lan
Author:
Xin Chu
Author:
Erjia Liu
Editor:
Yuefan Wei
Editor:
Shuyun Chng
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