In Situ Investigations on Stress and Microstructure Evolution in Polycrystalline Ti(C,N)/α-Al<sub>2</sub>O<sub>3</sub> CVD Coatings under Thermal Cycling Loads
The stress behavior and the associated microstructure evolution of industrial Ti(C,N)/α-Al<sub>2</sub>O<sub>3</sub> coatings subjected to thermal cycling are investigated by in situ energy dispersive synchrotron X-ray diffraction and transmission electron microscopy. Temperat...
| Main Authors: | , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2021-02-01
|
| Series: | Crystals |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2073-4352/11/2/158 |
| _version_ | 1797414855682031616 |
|---|---|
| author | José García Maiara Moreno Wei Wan Daniel Apel Haroldo Pinto Matthias Meixner Manuela Klaus Christoph Genzel |
| author_facet | José García Maiara Moreno Wei Wan Daniel Apel Haroldo Pinto Matthias Meixner Manuela Klaus Christoph Genzel |
| author_sort | José García |
| collection | DOAJ |
| description | The stress behavior and the associated microstructure evolution of industrial Ti(C,N)/α-Al<sub>2</sub>O<sub>3</sub> coatings subjected to thermal cycling are investigated by in situ energy dispersive synchrotron X-ray diffraction and transmission electron microscopy. Temperature-dependent stresses and changes in microstructural parameters (domain size and microstrain) are analyzed by in situ measurements at different temperatures between 25 and 800 °C, both in the heating up and cooling down step, including several thermal cycles. Transmission electron microscopy is used to evaluate defects before and after the thermal treatment. The introduction of high compressive stresses in α-Al<sub>2</sub>O<sub>3</sub> by top-blasting is connected to a high defect density at the basal planes of the alumina layer. The stress relaxation of the alumina layer at high temperatures is associated with a successive annihilation of defects until a reversible temperature-dependent stress condition is set. Top-blasting does not change the initial microstructure and residual stress of the Ti(C,N) layer. Ti(C,N) shows a cyclic stress behavior associated with the heat treatment and an elastic deformation behavior in the temperature range investigated. |
| first_indexed | 2024-03-09T05:39:57Z |
| format | Article |
| id | doaj.art-3d5706a664d1423d93ef2f12104903f9 |
| institution | Directory Open Access Journal |
| issn | 2073-4352 |
| language | English |
| last_indexed | 2024-03-09T05:39:57Z |
| publishDate | 2021-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Crystals |
| spelling | doaj.art-3d5706a664d1423d93ef2f12104903f92023-12-03T12:25:33ZengMDPI AGCrystals2073-43522021-02-0111215810.3390/cryst11020158In Situ Investigations on Stress and Microstructure Evolution in Polycrystalline Ti(C,N)/α-Al<sub>2</sub>O<sub>3</sub> CVD Coatings under Thermal Cycling LoadsJosé García0Maiara Moreno1Wei Wan2Daniel Apel3Haroldo Pinto4Matthias Meixner5Manuela Klaus6Christoph Genzel7AB Sandvik Coromant, R&D Material and Processes, SE 12680 Stockholm, SwedenDepartment of Materials Engineering, University of São Paulo, SP 13563-120 São Carlos, BrazilAB Sandvik Coromant, R&D Material and Processes, SE 12680 Stockholm, SwedenAbteilung Mikrostruktur-und Eigenspannungsanalyse, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, D-12489 Berlin, GermanyDepartment of Materials Engineering, University of São Paulo, SP 13563-120 São Carlos, BrazilAbteilung Mikrostruktur-und Eigenspannungsanalyse, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, D-12489 Berlin, GermanyAbteilung Mikrostruktur-und Eigenspannungsanalyse, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, D-12489 Berlin, GermanyAbteilung Mikrostruktur-und Eigenspannungsanalyse, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, D-12489 Berlin, GermanyThe stress behavior and the associated microstructure evolution of industrial Ti(C,N)/α-Al<sub>2</sub>O<sub>3</sub> coatings subjected to thermal cycling are investigated by in situ energy dispersive synchrotron X-ray diffraction and transmission electron microscopy. Temperature-dependent stresses and changes in microstructural parameters (domain size and microstrain) are analyzed by in situ measurements at different temperatures between 25 and 800 °C, both in the heating up and cooling down step, including several thermal cycles. Transmission electron microscopy is used to evaluate defects before and after the thermal treatment. The introduction of high compressive stresses in α-Al<sub>2</sub>O<sub>3</sub> by top-blasting is connected to a high defect density at the basal planes of the alumina layer. The stress relaxation of the alumina layer at high temperatures is associated with a successive annihilation of defects until a reversible temperature-dependent stress condition is set. Top-blasting does not change the initial microstructure and residual stress of the Ti(C,N) layer. Ti(C,N) shows a cyclic stress behavior associated with the heat treatment and an elastic deformation behavior in the temperature range investigated.https://www.mdpi.com/2073-4352/11/2/158Ti(C,N)/α-Al<sub>2</sub>O<sub>3</sub> CVD coatingsresidual and thermal stressessynchrotron X-ray diffractionTEM characterizationmicrostructure evolution |
| spellingShingle | José García Maiara Moreno Wei Wan Daniel Apel Haroldo Pinto Matthias Meixner Manuela Klaus Christoph Genzel In Situ Investigations on Stress and Microstructure Evolution in Polycrystalline Ti(C,N)/α-Al<sub>2</sub>O<sub>3</sub> CVD Coatings under Thermal Cycling Loads Crystals Ti(C,N)/α-Al<sub>2</sub>O<sub>3</sub> CVD coatings residual and thermal stresses synchrotron X-ray diffraction TEM characterization microstructure evolution |
| title | In Situ Investigations on Stress and Microstructure Evolution in Polycrystalline Ti(C,N)/α-Al<sub>2</sub>O<sub>3</sub> CVD Coatings under Thermal Cycling Loads |
| title_full | In Situ Investigations on Stress and Microstructure Evolution in Polycrystalline Ti(C,N)/α-Al<sub>2</sub>O<sub>3</sub> CVD Coatings under Thermal Cycling Loads |
| title_fullStr | In Situ Investigations on Stress and Microstructure Evolution in Polycrystalline Ti(C,N)/α-Al<sub>2</sub>O<sub>3</sub> CVD Coatings under Thermal Cycling Loads |
| title_full_unstemmed | In Situ Investigations on Stress and Microstructure Evolution in Polycrystalline Ti(C,N)/α-Al<sub>2</sub>O<sub>3</sub> CVD Coatings under Thermal Cycling Loads |
| title_short | In Situ Investigations on Stress and Microstructure Evolution in Polycrystalline Ti(C,N)/α-Al<sub>2</sub>O<sub>3</sub> CVD Coatings under Thermal Cycling Loads |
| title_sort | in situ investigations on stress and microstructure evolution in polycrystalline ti c n α al sub 2 sub o sub 3 sub cvd coatings under thermal cycling loads |
| topic | Ti(C,N)/α-Al<sub>2</sub>O<sub>3</sub> CVD coatings residual and thermal stresses synchrotron X-ray diffraction TEM characterization microstructure evolution |
| url | https://www.mdpi.com/2073-4352/11/2/158 |
| work_keys_str_mv | AT josegarcia insituinvestigationsonstressandmicrostructureevolutioninpolycrystallineticnaalsub2subosub3subcvdcoatingsunderthermalcyclingloads AT maiaramoreno insituinvestigationsonstressandmicrostructureevolutioninpolycrystallineticnaalsub2subosub3subcvdcoatingsunderthermalcyclingloads AT weiwan insituinvestigationsonstressandmicrostructureevolutioninpolycrystallineticnaalsub2subosub3subcvdcoatingsunderthermalcyclingloads AT danielapel insituinvestigationsonstressandmicrostructureevolutioninpolycrystallineticnaalsub2subosub3subcvdcoatingsunderthermalcyclingloads AT haroldopinto insituinvestigationsonstressandmicrostructureevolutioninpolycrystallineticnaalsub2subosub3subcvdcoatingsunderthermalcyclingloads AT matthiasmeixner insituinvestigationsonstressandmicrostructureevolutioninpolycrystallineticnaalsub2subosub3subcvdcoatingsunderthermalcyclingloads AT manuelaklaus insituinvestigationsonstressandmicrostructureevolutioninpolycrystallineticnaalsub2subosub3subcvdcoatingsunderthermalcyclingloads AT christophgenzel insituinvestigationsonstressandmicrostructureevolutioninpolycrystallineticnaalsub2subosub3subcvdcoatingsunderthermalcyclingloads |