Evolution of structure and residual stress of a fcc/hex-AlCrN multi-layered system upon thermal loading revealed by cross-sectional X-ray nano-diffraction.
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| Title: | Evolution of structure and residual stress of a fcc/hex-AlCrN multi-layered system upon thermal loading revealed by cross-sectional X-ray nano-diffraction. |
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| Authors: | Jäger, N.1 nikolaus.jaeger@unileoben.ac.at, Klima, S.1, Hruby, H.2, Julin, J.3, Burghammer, M.4, Keckes, J.F.5, Mitterer, C.6, Daniel, R.1 |
| Source: | Acta Materialia. Jan2019, Vol. 162, p55-66. 12p. |
| Subjects: | Residual stresses, Aluminum-chromium alloys, Coating processes, Face centered cubic structure, X-ray diffraction, Structural dynamics |
| Abstract: | Abstract Understanding the influence of process conditions and coating architecture on the microstructure and residual stress state of multi-layered coatings is essential for the development of novel thermally and mechanically stable coatings and requires advanced depth resolving characterization techniques. In this work, an arc-evaporated multi-layered coating, consisting of alternating Al 70 Cr 30 N and Al 90 Cr 10 N sublayers with an individual layer thickness between 120 nm and 380 nm, was investigated. The as-deposited state of the multi-layered coating and the state after vacuum annealing at 1000°C for 30 min was studied along its cross-section by synchrotron X-ray nano-diffraction using a beam with a diameter of 50 nm. The results revealed sublayers with alternating cubic and hexagonal phase, causing repeated interruption of the grain growth at the interfaces. The in-plane residual stress depth distribution across the coating thickness could be tuned in a wide range between pronounced compressive and slight tensile stress by combining the effects of the coating architecture and the modulated incident particle energy controlled by the substrate bias voltage ranging from −30 V to −250 V. This resulted in an oscillatory stress profile fluctuating between −2 GPa and −4.5 GPa or pronounced stress gradients with values between −4 GPa and 0.5 GPa. Finally, the decomposition routes of the metastable cubic Al 70 Cr 30 N phase could be controlled by the Al 90 Cr 10 N sublayers which acted as nucleation sites and governed the texture of the decomposition products as Cr 2 N. The results demonstrate that the cross sectional combinatorial approach, relying on a sophisticated multi-layer architecture combining various materials synthesized under tailored conditions, allowed for resolving structural variations and stress profiles in the individual layers within the complex architecture and pioneers the path for knowledge-based development of multi-layered coatings with predefined microstructure and a dedicated stress design. Graphical abstract Image 1 [ABSTRACT FROM AUTHOR] |
| Copyright of Acta Materialia is the property of Elsevier B.V. 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.) | |
| Database: | Engineering Source |
| FullText | Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 132549175 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Evolution of structure and residual stress of a fcc/hex-AlCrN multi-layered system upon thermal loading revealed by cross-sectional X-ray nano-diffraction. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Jäger%2C+N%2E%22">Jäger, N.</searchLink><relatesTo>1</relatesTo><i> nikolaus.jaeger@unileoben.ac.at</i><br /><searchLink fieldCode="AR" term="%22Klima%2C+S%2E%22">Klima, S.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Hruby%2C+H%2E%22">Hruby, H.</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Julin%2C+J%2E%22">Julin, J.</searchLink><relatesTo>3</relatesTo><br /><searchLink fieldCode="AR" term="%22Burghammer%2C+M%2E%22">Burghammer, M.</searchLink><relatesTo>4</relatesTo><br /><searchLink fieldCode="AR" term="%22Keckes%2C+J%2EF%2E%22">Keckes, J.F.</searchLink><relatesTo>5</relatesTo><br /><searchLink fieldCode="AR" term="%22Mitterer%2C+C%2E%22">Mitterer, C.</searchLink><relatesTo>6</relatesTo><br /><searchLink fieldCode="AR" term="%22Daniel%2C+R%2E%22">Daniel, R.</searchLink><relatesTo>1</relatesTo> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Acta+Materialia%22">Acta Materialia</searchLink>. Jan2019, Vol. 162, p55-66. 12p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Residual+stresses%22">Residual stresses</searchLink><br /><searchLink fieldCode="DE" term="%22Aluminum-chromium+alloys%22">Aluminum-chromium alloys</searchLink><br /><searchLink fieldCode="DE" term="%22Coating+processes%22">Coating processes</searchLink><br /><searchLink fieldCode="DE" term="%22Face+centered+cubic+structure%22">Face centered cubic structure</searchLink><br /><searchLink fieldCode="DE" term="%22X-ray+diffraction%22">X-ray diffraction</searchLink><br /><searchLink fieldCode="DE" term="%22Structural+dynamics%22">Structural dynamics</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Abstract Understanding the influence of process conditions and coating architecture on the microstructure and residual stress state of multi-layered coatings is essential for the development of novel thermally and mechanically stable coatings and requires advanced depth resolving characterization techniques. In this work, an arc-evaporated multi-layered coating, consisting of alternating Al 70 Cr 30 N and Al 90 Cr 10 N sublayers with an individual layer thickness between 120 nm and 380 nm, was investigated. The as-deposited state of the multi-layered coating and the state after vacuum annealing at 1000°C for 30 min was studied along its cross-section by synchrotron X-ray nano-diffraction using a beam with a diameter of 50 nm. The results revealed sublayers with alternating cubic and hexagonal phase, causing repeated interruption of the grain growth at the interfaces. The in-plane residual stress depth distribution across the coating thickness could be tuned in a wide range between pronounced compressive and slight tensile stress by combining the effects of the coating architecture and the modulated incident particle energy controlled by the substrate bias voltage ranging from −30 V to −250 V. This resulted in an oscillatory stress profile fluctuating between −2 GPa and −4.5 GPa or pronounced stress gradients with values between −4 GPa and 0.5 GPa. Finally, the decomposition routes of the metastable cubic Al 70 Cr 30 N phase could be controlled by the Al 90 Cr 10 N sublayers which acted as nucleation sites and governed the texture of the decomposition products as Cr 2 N. The results demonstrate that the cross sectional combinatorial approach, relying on a sophisticated multi-layer architecture combining various materials synthesized under tailored conditions, allowed for resolving structural variations and stress profiles in the individual layers within the complex architecture and pioneers the path for knowledge-based development of multi-layered coatings with predefined microstructure and a dedicated stress design. Graphical abstract Image 1 [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Acta Materialia is the property of Elsevier B.V. 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: 10.1016/j.actamat.2018.09.031 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 12 StartPage: 55 Subjects: – SubjectFull: Residual stresses Type: general – SubjectFull: Aluminum-chromium alloys Type: general – SubjectFull: Coating processes Type: general – SubjectFull: Face centered cubic structure Type: general – SubjectFull: X-ray diffraction Type: general – SubjectFull: Structural dynamics Type: general Titles: – TitleFull: Evolution of structure and residual stress of a fcc/hex-AlCrN multi-layered system upon thermal loading revealed by cross-sectional X-ray nano-diffraction. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Jäger, N. – PersonEntity: Name: NameFull: Klima, S. – PersonEntity: Name: NameFull: Hruby, H. – PersonEntity: Name: NameFull: Julin, J. – PersonEntity: Name: NameFull: Burghammer, M. – PersonEntity: Name: NameFull: Keckes, J.F. – PersonEntity: Name: NameFull: Mitterer, C. – PersonEntity: Name: NameFull: Daniel, R. IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 01 Text: Jan2019 Type: published Y: 2019 Identifiers: – Type: issn-print Value: 13596454 Numbering: – Type: volume Value: 162 Titles: – TitleFull: Acta Materialia Type: main |
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