Practical method to determine the effective zero-point of indentation depth for continuous stiffness measurement nanoindentation test with Berkovich tip
Abstract The zero-point of indentation depth in nanoindentation or depth-sensing instrumented indentation tests should be precisely set to evaluate the indentation hardness and indentation elastic modulus of materials to be tested, especially at shallow depths. A critical contact stiffness value has...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2022-04-01
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| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-022-10490-8 |
| _version_ | 1818480624961323008 |
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| author | Diancheng Geng Hao Yu Yasuki Okuno Sosuke Kondo Ryuta Kasada |
| author_facet | Diancheng Geng Hao Yu Yasuki Okuno Sosuke Kondo Ryuta Kasada |
| author_sort | Diancheng Geng |
| collection | DOAJ |
| description | Abstract The zero-point of indentation depth in nanoindentation or depth-sensing instrumented indentation tests should be precisely set to evaluate the indentation hardness and indentation elastic modulus of materials to be tested, especially at shallow depths. A critical contact stiffness value has been widely used to determine the zero-point in nanoindentation tests with a Berkovich tip using the continuous stiffness measurement (CSM) method. However, this criterion occasionally gives an inadequate zero-point owing to the surface roughness of materials, the vibration of the testing system, and the flaws of the CSM method at shallow depth. This study proposes a practical method to determine the effective zero-point of indentation depth, which was obtained linearly at the zero-point of contact stiffness and extrapolated from the depth-dependent contact stiffness values, except for those at initially unstable contact depths. The proposed method enables nanoindentation tests to obtain a constant indentation elastic modulus and low deviation of nanoindentation hardness of homogenously fused silica and metallic materials, which provides an efficient way to obtain more accurate test data. |
| first_indexed | 2024-12-10T11:25:38Z |
| format | Article |
| id | doaj.art-6b1ddf2ea54c40eba2309850c843b78e |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-12-10T11:25:38Z |
| publishDate | 2022-04-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-6b1ddf2ea54c40eba2309850c843b78e2022-12-22T01:50:45ZengNature PortfolioScientific Reports2045-23222022-04-011211710.1038/s41598-022-10490-8Practical method to determine the effective zero-point of indentation depth for continuous stiffness measurement nanoindentation test with Berkovich tipDiancheng Geng0Hao Yu1Yasuki Okuno2Sosuke Kondo3Ryuta Kasada4Institute for Materials Research, Tohoku UniversityInstitute for Materials Research, Tohoku UniversityInstitute for Materials Research, Tohoku UniversityInstitute for Materials Research, Tohoku UniversityInstitute for Materials Research, Tohoku UniversityAbstract The zero-point of indentation depth in nanoindentation or depth-sensing instrumented indentation tests should be precisely set to evaluate the indentation hardness and indentation elastic modulus of materials to be tested, especially at shallow depths. A critical contact stiffness value has been widely used to determine the zero-point in nanoindentation tests with a Berkovich tip using the continuous stiffness measurement (CSM) method. However, this criterion occasionally gives an inadequate zero-point owing to the surface roughness of materials, the vibration of the testing system, and the flaws of the CSM method at shallow depth. This study proposes a practical method to determine the effective zero-point of indentation depth, which was obtained linearly at the zero-point of contact stiffness and extrapolated from the depth-dependent contact stiffness values, except for those at initially unstable contact depths. The proposed method enables nanoindentation tests to obtain a constant indentation elastic modulus and low deviation of nanoindentation hardness of homogenously fused silica and metallic materials, which provides an efficient way to obtain more accurate test data.https://doi.org/10.1038/s41598-022-10490-8 |
| spellingShingle | Diancheng Geng Hao Yu Yasuki Okuno Sosuke Kondo Ryuta Kasada Practical method to determine the effective zero-point of indentation depth for continuous stiffness measurement nanoindentation test with Berkovich tip Scientific Reports |
| title | Practical method to determine the effective zero-point of indentation depth for continuous stiffness measurement nanoindentation test with Berkovich tip |
| title_full | Practical method to determine the effective zero-point of indentation depth for continuous stiffness measurement nanoindentation test with Berkovich tip |
| title_fullStr | Practical method to determine the effective zero-point of indentation depth for continuous stiffness measurement nanoindentation test with Berkovich tip |
| title_full_unstemmed | Practical method to determine the effective zero-point of indentation depth for continuous stiffness measurement nanoindentation test with Berkovich tip |
| title_short | Practical method to determine the effective zero-point of indentation depth for continuous stiffness measurement nanoindentation test with Berkovich tip |
| title_sort | practical method to determine the effective zero point of indentation depth for continuous stiffness measurement nanoindentation test with berkovich tip |
| url | https://doi.org/10.1038/s41598-022-10490-8 |
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