Nanomechanical properties of rough surfaces
The nanoindentation technique allows the determination of mechanical properties at nanometric scale. Hardness (H) and elastic modulus (E) profiles are usually determined by using the Oliver-Pharr method from the load/unload curves. This approach is valid only for flat surfaces, or at least, when a v...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Associação Brasileira de Metalurgia e Materiais (ABM); Associação Brasileira de Cerâmica (ABC); Associação Brasileira de Polímeros (ABPol)
2006-06-01
|
| Series: | Materials Research |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392006000200009 |
| _version_ | 1819017267637125120 |
|---|---|
| author | Gelson Biscaia de Souza Carlos Eugênio Foerster Silvio Luiz Rutz da Silva Carlos Maurício Lepienski |
| author_facet | Gelson Biscaia de Souza Carlos Eugênio Foerster Silvio Luiz Rutz da Silva Carlos Maurício Lepienski |
| author_sort | Gelson Biscaia de Souza |
| collection | DOAJ |
| description | The nanoindentation technique allows the determination of mechanical properties at nanometric scale. Hardness (H) and elastic modulus (E) profiles are usually determined by using the Oliver-Pharr method from the load/unload curves. This approach is valid only for flat surfaces, or at least, when a very low degree of asperity is present (lower than 30 nm). The basic statement is the determination of the zero tip-surface contact point. If a rough surface is present, errors can occur in determining this contact point and, as a consequence, the surface hardness and elastic modulus profiles are drastically altered resulting in under evaluated values. Surfaces with different roughness were produced by controlled nitrogen glow discharge process on titanium. The changed nitriding parameters were different N2/H2 atmospheres and temperatures (600 °C-900 °C). The most correct H and E profiles were obtained by using the contact stiffness analysis method, proposed here, that overcomes the surface roughness. The obtained results were compared with available literature data. |
| first_indexed | 2024-12-21T03:00:49Z |
| format | Article |
| id | doaj.art-afaf2a59773d4973a8f31fff0cdb0cee |
| institution | Directory Open Access Journal |
| issn | 1516-1439 |
| language | English |
| last_indexed | 2024-12-21T03:00:49Z |
| publishDate | 2006-06-01 |
| publisher | Associação Brasileira de Metalurgia e Materiais (ABM); Associação Brasileira de Cerâmica (ABC); Associação Brasileira de Polímeros (ABPol) |
| record_format | Article |
| series | Materials Research |
| spelling | doaj.art-afaf2a59773d4973a8f31fff0cdb0cee2022-12-21T19:18:11ZengAssociação Brasileira de Metalurgia e Materiais (ABM); Associação Brasileira de Cerâmica (ABC); Associação Brasileira de Polímeros (ABPol)Materials Research1516-14392006-06-019215916310.1590/S1516-14392006000200009Nanomechanical properties of rough surfacesGelson Biscaia de SouzaCarlos Eugênio FoersterSilvio Luiz Rutz da SilvaCarlos Maurício LepienskiThe nanoindentation technique allows the determination of mechanical properties at nanometric scale. Hardness (H) and elastic modulus (E) profiles are usually determined by using the Oliver-Pharr method from the load/unload curves. This approach is valid only for flat surfaces, or at least, when a very low degree of asperity is present (lower than 30 nm). The basic statement is the determination of the zero tip-surface contact point. If a rough surface is present, errors can occur in determining this contact point and, as a consequence, the surface hardness and elastic modulus profiles are drastically altered resulting in under evaluated values. Surfaces with different roughness were produced by controlled nitrogen glow discharge process on titanium. The changed nitriding parameters were different N2/H2 atmospheres and temperatures (600 °C-900 °C). The most correct H and E profiles were obtained by using the contact stiffness analysis method, proposed here, that overcomes the surface roughness. The obtained results were compared with available literature data.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392006000200009nanoindentationroughnessnitridingtitanium |
| spellingShingle | Gelson Biscaia de Souza Carlos Eugênio Foerster Silvio Luiz Rutz da Silva Carlos Maurício Lepienski Nanomechanical properties of rough surfaces Materials Research nanoindentation roughness nitriding titanium |
| title | Nanomechanical properties of rough surfaces |
| title_full | Nanomechanical properties of rough surfaces |
| title_fullStr | Nanomechanical properties of rough surfaces |
| title_full_unstemmed | Nanomechanical properties of rough surfaces |
| title_short | Nanomechanical properties of rough surfaces |
| title_sort | nanomechanical properties of rough surfaces |
| topic | nanoindentation roughness nitriding titanium |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392006000200009 |
| work_keys_str_mv | AT gelsonbiscaiadesouza nanomechanicalpropertiesofroughsurfaces AT carloseugeniofoerster nanomechanicalpropertiesofroughsurfaces AT silvioluizrutzdasilva nanomechanicalpropertiesofroughsurfaces AT carlosmauriciolepienski nanomechanicalpropertiesofroughsurfaces |