Investigations on the Surface Integrity and Wear Mechanisms of TiAlYN-Coated Tools in Inconel 718 Milling Operations
Inconel 718 is a Ni superalloy with superior mechanical properties, even at high temperatures. However, due to its high hardness and low thermal conductivity, it is considered a difficult-to-machine material. This material is widely used in applications that require good dimensional stability, makin...
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MDPI AG
2024-01-01
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| Online Access: | https://www.mdpi.com/1996-1944/17/2/443 |
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| author | Francisco J. G. Silva Naiara P. V. Sebbe Rúben D. F. S. Costa André F. V. Pedroso Rita C. M. Sales-Contini Marta L. S. Barbosa Rui P. Martinho |
| author_facet | Francisco J. G. Silva Naiara P. V. Sebbe Rúben D. F. S. Costa André F. V. Pedroso Rita C. M. Sales-Contini Marta L. S. Barbosa Rui P. Martinho |
| author_sort | Francisco J. G. Silva |
| collection | DOAJ |
| description | Inconel 718 is a Ni superalloy with superior mechanical properties, even at high temperatures. However, due to its high hardness and low thermal conductivity, it is considered a difficult-to-machine material. This material is widely used in applications that require good dimensional stability, making the milling process the most used in machining this alloy. The wear resulting from this process and the quality of the machined surface are still challenging factors when it comes to Inconel 718. TiAlN-based coating has been used on cutting tools with Yttrium as a doping element to improve the process performance. Based on this, this work evaluated the machined surface integrity and wear resistance of cutting tools coated using Physical Vapor Deposition (PVD) HiPIMS with TiAlYN in the end milling of Inconel 718, varying the process parameters such as cutting speed (<i>v</i><sub>c</sub>), feed per tooth (<i>f</i><sub>z</sub>), and cutting length (<i>L</i><sub>cut</sub>). It was verified that the <i>L</i><sub>cut</sub> is the parameter that exerts the most significant influence since, even at small distances, Inconel 718 already generates high tool wear (TW). Furthermore, the main wear mechanisms were abrasive and adhesive wear, with the development of a built-up edge (BUE) under a125 m/min feed rate (<i>f</i>) and a <i>L</i><sub>cut</sub> = 15 m. Chipping, cracking, and delamination of the coating were also observed, indicating a lack of adhesion between the coating and the substrate, suggesting the need for a good interlayer or the adjustment of the PVD parameters. |
| first_indexed | 2024-03-08T10:41:56Z |
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| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-08T10:41:56Z |
| publishDate | 2024-01-01 |
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| series | Materials |
| spelling | doaj.art-0b5268fc0a68451da749e81d582556ec2024-01-26T17:29:01ZengMDPI AGMaterials1996-19442024-01-0117244310.3390/ma17020443Investigations on the Surface Integrity and Wear Mechanisms of TiAlYN-Coated Tools in Inconel 718 Milling OperationsFrancisco J. G. Silva0Naiara P. V. Sebbe1Rúben D. F. S. Costa2André F. V. Pedroso3Rita C. M. Sales-Contini4Marta L. S. Barbosa5Rui P. Martinho6ISEP, Polytechnic Institute of Porto, Rua Dr. António Bernardino de Almeida, 4249-015 Porto, PortugalISEP, Polytechnic Institute of Porto, Rua Dr. António Bernardino de Almeida, 4249-015 Porto, PortugalAssociate Laboratory for Energy, Transports and Aerospace (LAETA-INEGI), Rua Dr. Roberto Frias, 400, 4200-465 Porto, PortugalISEP, Polytechnic Institute of Porto, Rua Dr. António Bernardino de Almeida, 4249-015 Porto, PortugalISEP, Polytechnic Institute of Porto, Rua Dr. António Bernardino de Almeida, 4249-015 Porto, PortugalDepartment of Mechanical Engineering, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 400, 4200-465 Porto, PortugalISEP, Polytechnic Institute of Porto, Rua Dr. António Bernardino de Almeida, 4249-015 Porto, PortugalInconel 718 is a Ni superalloy with superior mechanical properties, even at high temperatures. However, due to its high hardness and low thermal conductivity, it is considered a difficult-to-machine material. This material is widely used in applications that require good dimensional stability, making the milling process the most used in machining this alloy. The wear resulting from this process and the quality of the machined surface are still challenging factors when it comes to Inconel 718. TiAlN-based coating has been used on cutting tools with Yttrium as a doping element to improve the process performance. Based on this, this work evaluated the machined surface integrity and wear resistance of cutting tools coated using Physical Vapor Deposition (PVD) HiPIMS with TiAlYN in the end milling of Inconel 718, varying the process parameters such as cutting speed (<i>v</i><sub>c</sub>), feed per tooth (<i>f</i><sub>z</sub>), and cutting length (<i>L</i><sub>cut</sub>). It was verified that the <i>L</i><sub>cut</sub> is the parameter that exerts the most significant influence since, even at small distances, Inconel 718 already generates high tool wear (TW). Furthermore, the main wear mechanisms were abrasive and adhesive wear, with the development of a built-up edge (BUE) under a125 m/min feed rate (<i>f</i>) and a <i>L</i><sub>cut</sub> = 15 m. Chipping, cracking, and delamination of the coating were also observed, indicating a lack of adhesion between the coating and the substrate, suggesting the need for a good interlayer or the adjustment of the PVD parameters.https://www.mdpi.com/1996-1944/17/2/443millingInconel 718TiAlYN coatingsHiPIMS techniquetool wear mechanismssurface integrity |
| spellingShingle | Francisco J. G. Silva Naiara P. V. Sebbe Rúben D. F. S. Costa André F. V. Pedroso Rita C. M. Sales-Contini Marta L. S. Barbosa Rui P. Martinho Investigations on the Surface Integrity and Wear Mechanisms of TiAlYN-Coated Tools in Inconel 718 Milling Operations Materials milling Inconel 718 TiAlYN coatings HiPIMS technique tool wear mechanisms surface integrity |
| title | Investigations on the Surface Integrity and Wear Mechanisms of TiAlYN-Coated Tools in Inconel 718 Milling Operations |
| title_full | Investigations on the Surface Integrity and Wear Mechanisms of TiAlYN-Coated Tools in Inconel 718 Milling Operations |
| title_fullStr | Investigations on the Surface Integrity and Wear Mechanisms of TiAlYN-Coated Tools in Inconel 718 Milling Operations |
| title_full_unstemmed | Investigations on the Surface Integrity and Wear Mechanisms of TiAlYN-Coated Tools in Inconel 718 Milling Operations |
| title_short | Investigations on the Surface Integrity and Wear Mechanisms of TiAlYN-Coated Tools in Inconel 718 Milling Operations |
| title_sort | investigations on the surface integrity and wear mechanisms of tialyn coated tools in inconel 718 milling operations |
| topic | milling Inconel 718 TiAlYN coatings HiPIMS technique tool wear mechanisms surface integrity |
| url | https://www.mdpi.com/1996-1944/17/2/443 |
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