A Modified Method for Hardness Determination from Nanoindentation Experiments with Imperfect Indenters
Nanoindentation is an effective nondestructive method for small scale determination of mechanical properties of materials. However, indentation response of metallic materials is very sensitive to indenter tip roundness, size effects, loading rate, and so forth. This study will analyze the effect of...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2016-01-01
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| Series: | Advances in Materials Science and Engineering |
| Online Access: | http://dx.doi.org/10.1155/2016/9213841 |
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| author | Wei Chao Guo Heng Xu Xin Qin Gao Xiao Li Hou Yan Li |
| author_facet | Wei Chao Guo Heng Xu Xin Qin Gao Xiao Li Hou Yan Li |
| author_sort | Wei Chao Guo |
| collection | DOAJ |
| description | Nanoindentation is an effective nondestructive method for small scale determination of mechanical properties of materials. However, indentation response of metallic materials is very sensitive to indenter tip roundness, size effects, loading rate, and so forth. This study will analyze the effect of indenter shape imperfections on hardness determination. For this purpose, experimental investigations and finite element simulations are carried out. At first, it is found that hardness values determined with Oliver and Pharr’s method are affected by errors caused by imperfect indenter tip: errors increase for imperfect indenters with larger tip radii. Afterwards, several commonly used methods accounting at different extents for tip radius variations are compared. However, most of those methods are found not to be accurate for shallow indentation. For this reason, a novel hardness determination method based on geometrical relations of the imperfect indenter tip is developed. Results show that the new approach is very effective even in the case of shallow indentation. |
| format | Article |
| id | doaj-art-e280aa7937bf44cba3cf10c07c163f8c |
| institution | DOAJ |
| issn | 1687-8434 1687-8442 |
| language | English |
| publishDate | 2016-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Materials Science and Engineering |
| spelling | doaj-art-e280aa7937bf44cba3cf10c07c163f8c2025-08-20T03:21:06ZengWileyAdvances in Materials Science and Engineering1687-84341687-84422016-01-01201610.1155/2016/92138419213841A Modified Method for Hardness Determination from Nanoindentation Experiments with Imperfect IndentersWei Chao Guo0Heng Xu1Xin Qin Gao2Xiao Li Hou3Yan Li4School of Mechanical and Instrumental Engineering, Xi’an University of Technology, Xi’an 710048, ChinaBusiness Intelligence and Knowledge Engineering Lab, Henan University of Technology, Zhengzhou 450001, ChinaSchool of Mechanical and Instrumental Engineering, Xi’an University of Technology, Xi’an 710048, ChinaSchool of Mechanical and Instrumental Engineering, Xi’an University of Technology, Xi’an 710048, ChinaSchool of Mechanical and Instrumental Engineering, Xi’an University of Technology, Xi’an 710048, ChinaNanoindentation is an effective nondestructive method for small scale determination of mechanical properties of materials. However, indentation response of metallic materials is very sensitive to indenter tip roundness, size effects, loading rate, and so forth. This study will analyze the effect of indenter shape imperfections on hardness determination. For this purpose, experimental investigations and finite element simulations are carried out. At first, it is found that hardness values determined with Oliver and Pharr’s method are affected by errors caused by imperfect indenter tip: errors increase for imperfect indenters with larger tip radii. Afterwards, several commonly used methods accounting at different extents for tip radius variations are compared. However, most of those methods are found not to be accurate for shallow indentation. For this reason, a novel hardness determination method based on geometrical relations of the imperfect indenter tip is developed. Results show that the new approach is very effective even in the case of shallow indentation.http://dx.doi.org/10.1155/2016/9213841 |
| spellingShingle | Wei Chao Guo Heng Xu Xin Qin Gao Xiao Li Hou Yan Li A Modified Method for Hardness Determination from Nanoindentation Experiments with Imperfect Indenters Advances in Materials Science and Engineering |
| title | A Modified Method for Hardness Determination from Nanoindentation Experiments with Imperfect Indenters |
| title_full | A Modified Method for Hardness Determination from Nanoindentation Experiments with Imperfect Indenters |
| title_fullStr | A Modified Method for Hardness Determination from Nanoindentation Experiments with Imperfect Indenters |
| title_full_unstemmed | A Modified Method for Hardness Determination from Nanoindentation Experiments with Imperfect Indenters |
| title_short | A Modified Method for Hardness Determination from Nanoindentation Experiments with Imperfect Indenters |
| title_sort | modified method for hardness determination from nanoindentation experiments with imperfect indenters |
| url | http://dx.doi.org/10.1155/2016/9213841 |
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