Effect of ion irradiation on nanoindentation fracture and deformation in silicon carbide
Silicon carbide is desirable for many nuclear applications, making it necessary to understand how it deforms after irradiation. Ion implantation combined with nanoindentation is commonly used to measure radiation-induced changes to mechanical properties; hardness and modulus can be calculated from l...
| Main Authors: | , , |
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| Format: | Journal article |
| Language: | English |
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Springer
2021
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| _version_ | 1797078529250164736 |
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| author | Leide, AJ Todd, RI Armstrong, DEJ |
| author_facet | Leide, AJ Todd, RI Armstrong, DEJ |
| author_sort | Leide, AJ |
| collection | OXFORD |
| description | Silicon carbide is desirable for many nuclear applications, making it necessary to understand how it deforms after irradiation. Ion implantation combined with nanoindentation is commonly used to measure radiation-induced changes to mechanical properties; hardness and modulus can be calculated from load–displacement curves, and fracture toughness can be estimated from surface crack lengths. Further insight into indentation deformation and fracture is required to understand the observed changes to mechanical properties caused by irradiation. This paper investigates indentation deformation using high-resolution electron backscatter diffraction (HR-EBSD) and Raman spectroscopy. Significant differences exist after irradiation: fracture is suppressed by swelling-induced compressive residual stresses, and the plastically deformed region extends further from the indentation. During focused ion beam cross-sectioning, indentation cracks grow, and residual stresses are modified. The results clarify the mechanisms responsible for the modification of apparent hardness and apparent indentation toughness values caused by the compressive residual stresses in ion-implanted specimens.
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| first_indexed | 2024-03-07T00:33:11Z |
| format | Journal article |
| id | oxford-uuid:80842df8-e88d-4232-89e5-f2b18b1cb135 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T00:33:11Z |
| publishDate | 2021 |
| publisher | Springer |
| record_format | dspace |
| spelling | oxford-uuid:80842df8-e88d-4232-89e5-f2b18b1cb1352022-03-26T21:23:53ZEffect of ion irradiation on nanoindentation fracture and deformation in silicon carbideJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:80842df8-e88d-4232-89e5-f2b18b1cb135EnglishSymplectic ElementsSpringer2021Leide, AJTodd, RIArmstrong, DEJSilicon carbide is desirable for many nuclear applications, making it necessary to understand how it deforms after irradiation. Ion implantation combined with nanoindentation is commonly used to measure radiation-induced changes to mechanical properties; hardness and modulus can be calculated from load–displacement curves, and fracture toughness can be estimated from surface crack lengths. Further insight into indentation deformation and fracture is required to understand the observed changes to mechanical properties caused by irradiation. This paper investigates indentation deformation using high-resolution electron backscatter diffraction (HR-EBSD) and Raman spectroscopy. Significant differences exist after irradiation: fracture is suppressed by swelling-induced compressive residual stresses, and the plastically deformed region extends further from the indentation. During focused ion beam cross-sectioning, indentation cracks grow, and residual stresses are modified. The results clarify the mechanisms responsible for the modification of apparent hardness and apparent indentation toughness values caused by the compressive residual stresses in ion-implanted specimens. |
| spellingShingle | Leide, AJ Todd, RI Armstrong, DEJ Effect of ion irradiation on nanoindentation fracture and deformation in silicon carbide |
| title | Effect of ion irradiation on nanoindentation fracture and deformation in silicon carbide |
| title_full | Effect of ion irradiation on nanoindentation fracture and deformation in silicon carbide |
| title_fullStr | Effect of ion irradiation on nanoindentation fracture and deformation in silicon carbide |
| title_full_unstemmed | Effect of ion irradiation on nanoindentation fracture and deformation in silicon carbide |
| title_short | Effect of ion irradiation on nanoindentation fracture and deformation in silicon carbide |
| title_sort | effect of ion irradiation on nanoindentation fracture and deformation in silicon carbide |
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