Influence of modulus-to-hardness ratio and harmonic parameters on continuous stiffness measurement during nanoindentation.
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| Title: | Influence of modulus-to-hardness ratio and harmonic parameters on continuous stiffness measurement during nanoindentation. |
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| Authors: | Merle, Benoit1 benoit.merle@fau.de, Maier-Kiener, Verena2, Pharr, George M.3 |
| Source: | Acta Materialia. Aug2017, Vol. 134, p167-176. 10p. |
| Subjects: | Elastic modulus, Stiffness (Mechanics), Nanoindentation, Mechanical behavior of materials, Hardness |
| Abstract: | Dynamic nanoindentation is a popular method for continuously probing the mechanical properties of a sample as a function of depth. It is shown here that special caution should be exercised when testing materials with high modulus-to-hardness ratios (E/H) at fast loading rates, as the choice of harmonic parameters can result in a significant underestimation of the contact stiffness and hence the elastic modulus. The origin of this behavior is traced back to a bias occurring during signal processing by the lock-in amplifier. The possible consequences of flawed measurements are highlighted and a practical method for detecting possible occurrence from the phase angle signal is presented. [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: 124114670 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Influence of modulus-to-hardness ratio and harmonic parameters on continuous stiffness measurement during nanoindentation. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Merle%2C+Benoit%22">Merle, Benoit</searchLink><relatesTo>1</relatesTo><i> benoit.merle@fau.de</i><br /><searchLink fieldCode="AR" term="%22Maier-Kiener%2C+Verena%22">Maier-Kiener, Verena</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Pharr%2C+George+M%2E%22">Pharr, George M.</searchLink><relatesTo>3</relatesTo> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Acta+Materialia%22">Acta Materialia</searchLink>. Aug2017, Vol. 134, p167-176. 10p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Elastic+modulus%22">Elastic modulus</searchLink><br /><searchLink fieldCode="DE" term="%22Stiffness+%28Mechanics%29%22">Stiffness (Mechanics)</searchLink><br /><searchLink fieldCode="DE" term="%22Nanoindentation%22">Nanoindentation</searchLink><br /><searchLink fieldCode="DE" term="%22Mechanical+behavior+of+materials%22">Mechanical behavior of materials</searchLink><br /><searchLink fieldCode="DE" term="%22Hardness%22">Hardness</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Dynamic nanoindentation is a popular method for continuously probing the mechanical properties of a sample as a function of depth. It is shown here that special caution should be exercised when testing materials with high modulus-to-hardness ratios (E/H) at fast loading rates, as the choice of harmonic parameters can result in a significant underestimation of the contact stiffness and hence the elastic modulus. The origin of this behavior is traced back to a bias occurring during signal processing by the lock-in amplifier. The possible consequences of flawed measurements are highlighted and a practical method for detecting possible occurrence from the phase angle signal is presented. [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.2017.05.036 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 10 StartPage: 167 Subjects: – SubjectFull: Elastic modulus Type: general – SubjectFull: Stiffness (Mechanics) Type: general – SubjectFull: Nanoindentation Type: general – SubjectFull: Mechanical behavior of materials Type: general – SubjectFull: Hardness Type: general Titles: – TitleFull: Influence of modulus-to-hardness ratio and harmonic parameters on continuous stiffness measurement during nanoindentation. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Merle, Benoit – PersonEntity: Name: NameFull: Maier-Kiener, Verena – PersonEntity: Name: NameFull: Pharr, George M. IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 08 Text: Aug2017 Type: published Y: 2017 Identifiers: – Type: issn-print Value: 13596454 Numbering: – Type: volume Value: 134 Titles: – TitleFull: Acta Materialia Type: main |
| ResultId | 1 |
