Minnert, Christian ; Durst, Karsten (2022)
Nanoindentation creep testing: Advantages and limitations of the constant contact pressure method.
In: Journal of Materials Research, 37 (2)
doi: 10.1557/s43578-021-00445-6
Artikel, Bibliographie
Dies ist die neueste Version dieses Eintrags.
Kurzbeschreibung (Abstract)
Different loading protocols have been developed in the past to investigate the creep properties of materials using instrumented indentation testing technique. Recently, a new indentation creep method was presented, in which the contact pressure is kept constant during the creep test segment, similar to the constant stress applied in a uniaxial creep experiment. In this study, the results of constant contact pressure creep tests are compared to uniaxial and constant load hold indentation creep experiments on ultrafine grained Cu and CuAl5. The constant contact pressure method yields similar stress exponents as the uniaxial tests, down to indentation strain rates of 10⁻⁶ s⁻¹, whereas the constant load hold method results mainly in a relaxation of the material at decreasing applied pressures. Furthermore, a pronounced change in the power law exponent at large stress reductions is found for both uniaxial and constant contact pressure tests, indicating a change in deformation mechanism of ultrafine grained metals.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2022 |
| Autor(en): | Minnert, Christian ; Durst, Karsten |
| Art des Eintrags: | Bibliographie |
| Titel: | Nanoindentation creep testing: Advantages and limitations of the constant contact pressure method |
| Sprache: | Englisch |
| Publikationsjahr: | 2022 |
| Ort: | Berlin |
| Verlag: | Springer International Publishing |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Journal of Materials Research |
| Jahrgang/Volume einer Zeitschrift: | 37 |
| (Heft-)Nummer: | 2 |
| DOI: | 10.1557/s43578-021-00445-6 |
| Zugehörige Links: | |
| Kurzbeschreibung (Abstract): | Different loading protocols have been developed in the past to investigate the creep properties of materials using instrumented indentation testing technique. Recently, a new indentation creep method was presented, in which the contact pressure is kept constant during the creep test segment, similar to the constant stress applied in a uniaxial creep experiment. In this study, the results of constant contact pressure creep tests are compared to uniaxial and constant load hold indentation creep experiments on ultrafine grained Cu and CuAl5. The constant contact pressure method yields similar stress exponents as the uniaxial tests, down to indentation strain rates of 10⁻⁶ s⁻¹, whereas the constant load hold method results mainly in a relaxation of the material at decreasing applied pressures. Furthermore, a pronounced change in the power law exponent at large stress reductions is found for both uniaxial and constant contact pressure tests, indicating a change in deformation mechanism of ultrafine grained metals. |
| Freie Schlagworte: | Nanoindentation, Creep, Strain rate sensitivity, Severe plastic deformation, Ultrafine grained microstructure, Copper alloys |
| Sachgruppe der Dewey Dezimalklassifikatin (DDC): | 500 Naturwissenschaften und Mathematik > 530 Physik 500 Naturwissenschaften und Mathematik > 540 Chemie |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Physikalische Metallkunde |
| Hinterlegungsdatum: | 25 Sep 2024 08:44 |
| Letzte Änderung: | 25 Sep 2024 08:44 |
| PPN: | |
| Export: | |
| Suche nach Titel in: | TUfind oder in Google |
Verfügbare Versionen dieses Eintrags
-
Nanoindentation creep testing: Advantages and limitations of the constant contact pressure method. (deposited 24 Sep 2024 09:32)
- Nanoindentation creep testing: Advantages and limitations of the constant contact pressure method. (deposited 25 Sep 2024 08:44) [Gegenwärtig angezeigt]
 |
Frage zum Eintrag |
Optionen (nur für Redakteure)
 |
Redaktionelle Details anzeigen |
Drucken
Impressum