Precision machining of alumina-reinforced ceramic matrix composites by femtosecond laser.
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| Title: | Precision machining of alumina-reinforced ceramic matrix composites by femtosecond laser. |
|---|---|
| Authors: | Radhakrishnan, Jagdheesh1 (AUTHOR) jagdheesh.radhakrish@the-mtc.org, Scott, Rhys1 (AUTHOR), Marimuthu, Sundar1 (AUTHOR) |
| Source: | International Journal of Advanced Manufacturing Technology. May2025, Vol. 138 Issue 3, p1335-1348. 14p. |
| Subjects: | High power lasers, Ceramic engineering, Laser machining, Surface roughness measurement, Production engineering |
| Abstract: | High-performance ceramic material composites (CMCs) have excellent applications in aerospace industries. However, the machining of the CMSs is challenging due to the inherent properties such as high hardness, heterogeneous structure, and brittleness. Understanding the machinability, ablation mechanism, and the magnitude of the damage is essential to control the machining quality. The study investigates the characteristics of laser process parameters on the machinability of the Al2O3/Al2O3 CMCs in the femtosecond regime. The laser-machined slots were subjected to geometrical analysis, surface roughness measurements, and material removal rates with respect to the process parameters. The laser-machined surface structures and the microstructures of the cross-sections were analysed by scanning electron microscope. The study reveals that high laser power favours the maximum material removal rate irrespective of the scan rates. The peak material removal rate of 2.36 mm3/min was achieved at the power level of 14.23 W. High laser power and slow scan rates produced a smooth machined surface of the slots due to the melting and resolidification of the surface. Some microcracks were observed at the bottom of the laser-machined slots. The microcracks were more prominent in the transverse direction compared to the longitudinal direction. The formation of microcracks is due to the expansion and shrinkage caused during the laser machining process. The elemental analysis of the slots reveals a thick oxide layer at the bottom of the slots, and the thickness of the oxide layer is a function of laser power and scan rates. [ABSTRACT FROM AUTHOR] |
| Copyright of International Journal of Advanced Manufacturing Technology is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
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| Header | DbId: egs DbLabel: Engineering Source An: 185155513 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Precision machining of alumina-reinforced ceramic matrix composites by femtosecond laser. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Radhakrishnan%2C+Jagdheesh%22">Radhakrishnan, Jagdheesh</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> jagdheesh.radhakrish@the-mtc.org</i><br /><searchLink fieldCode="AR" term="%22Scott%2C+Rhys%22">Scott, Rhys</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Marimuthu%2C+Sundar%22">Marimuthu, Sundar</searchLink><relatesTo>1</relatesTo> (AUTHOR) – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22International+Journal+of+Advanced+Manufacturing+Technology%22">International Journal of Advanced Manufacturing Technology</searchLink>. May2025, Vol. 138 Issue 3, p1335-1348. 14p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22High+power+lasers%22">High power lasers</searchLink><br /><searchLink fieldCode="DE" term="%22Ceramic+engineering%22">Ceramic engineering</searchLink><br /><searchLink fieldCode="DE" term="%22Laser+machining%22">Laser machining</searchLink><br /><searchLink fieldCode="DE" term="%22Surface+roughness+measurement%22">Surface roughness measurement</searchLink><br /><searchLink fieldCode="DE" term="%22Production+engineering%22">Production engineering</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: High-performance ceramic material composites (CMCs) have excellent applications in aerospace industries. However, the machining of the CMSs is challenging due to the inherent properties such as high hardness, heterogeneous structure, and brittleness. Understanding the machinability, ablation mechanism, and the magnitude of the damage is essential to control the machining quality. The study investigates the characteristics of laser process parameters on the machinability of the Al2O3/Al2O3 CMCs in the femtosecond regime. The laser-machined slots were subjected to geometrical analysis, surface roughness measurements, and material removal rates with respect to the process parameters. The laser-machined surface structures and the microstructures of the cross-sections were analysed by scanning electron microscope. The study reveals that high laser power favours the maximum material removal rate irrespective of the scan rates. The peak material removal rate of 2.36 mm3/min was achieved at the power level of 14.23 W. High laser power and slow scan rates produced a smooth machined surface of the slots due to the melting and resolidification of the surface. Some microcracks were observed at the bottom of the laser-machined slots. The microcracks were more prominent in the transverse direction compared to the longitudinal direction. The formation of microcracks is due to the expansion and shrinkage caused during the laser machining process. The elemental analysis of the slots reveals a thick oxide layer at the bottom of the slots, and the thickness of the oxide layer is a function of laser power and scan rates. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of International Journal of Advanced Manufacturing Technology is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1007/s00170-025-15563-2 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 14 StartPage: 1335 Subjects: – SubjectFull: High power lasers Type: general – SubjectFull: Ceramic engineering Type: general – SubjectFull: Laser machining Type: general – SubjectFull: Surface roughness measurement Type: general – SubjectFull: Production engineering Type: general Titles: – TitleFull: Precision machining of alumina-reinforced ceramic matrix composites by femtosecond laser. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Radhakrishnan, Jagdheesh – PersonEntity: Name: NameFull: Scott, Rhys – PersonEntity: Name: NameFull: Marimuthu, Sundar IsPartOfRelationships: – BibEntity: Dates: – D: 21 M: 05 Text: May2025 Type: published Y: 2025 Identifiers: – Type: issn-print Value: 02683768 Numbering: – Type: volume Value: 138 – Type: issue Value: 3 Titles: – TitleFull: International Journal of Advanced Manufacturing Technology Type: main |
| ResultId | 1 |
