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Pop-in Behavior during Nanoindentation on Steel Alloy

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Automatisierte Medienanalyse

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because the descent of the day
Isolator <Luftstrahltriebwerk>
Satz <Drucktechnik>
Airbus 300
Fiat 500
Stoff <Textilien>
Drilling <Waffe>
Pfadfinder <Flugzeug>
Zementation <Metallurgie>
Stoff <Textilien>
Sänger <Raumtransporter>
Experiment innen
Explorer <Satellit>
Ford Focus
Los Alamos National Laboratory
Hulk <Schiff>
Entwicklung <Photographie>
Drilling <Waffe>
Öffentliches Verkehrsmittel
Spiel <Technik>
Korea Atomic Energy Research Institute
Elektrolokomotive Baureihe 80
Band <Textilien>


Formale Metadaten

Titel Pop-in Behavior during Nanoindentation on Steel Alloy
Alternativer Titel Pop-in deformation: APMS conference
Serientitel Adventures in the Physical Metallurgy of Steels 2013
Anzahl der Teile 31
Autor Han, Heung Nam
Lizenz CC-Namensnennung 3.0 Unported:
Sie dürfen das Werk bzw. den Inhalt zu jedem legalen Zweck nutzen, verändern und in unveränderter oder veränderter Form vervielfältigen, verbreiten und öffentlich zugänglich machen, sofern Sie den Namen des Autors/Rechteinhabers in der von ihm festgelegten Weise nennen.
DOI 10.5446/18625
Herausgeber University of Cambridge
Erscheinungsjahr 2013
Sprache Englisch
Produzent Central Sites Technical Services

Inhaltliche Metadaten

Fachgebiet Technik
Abstract A lecture given by Heung Nam Han, at the Adventures in the Physical Metallurgy of Steels (APMS) conference held in Cambridge University. About the nanoindentation of steel, and the pop-in effect, variant selection. Nano-indentation is an outstanding method to probe small-scale mechanical properties, which are relevant to a wide range of materials and applications. The response of a material to nano-indentation is usually presented in the form of a loadâ€"displacement curve. It is known that nano-indentation pop-in is a sudden displacement excursion on the load-displacement curve during load-controlled indentation. The sources of pop-in might be basically geometrical softening behaviors. In this study, several physical events which cause pop-ins during nano-indentation of steel alloys will be discussed. First, we consider the onset of plasticity resulting from dislocation nucleation or dislocation source activation in ferritic steel, which can produce the geometrical softening in the early stage of mechanical contact during nano-indentation. The effect of strain aging on the nano-indentation pop-in is observed and compared to the well-known macro-scale yield drop in tensile test. Second, both strain-induced alpha prime and epsilon martensitic transformations of metastable austenite are investigated by nano-indentation of individual austenite grains in multi-phase steels. The pop-ins are described as resulting from the geometrical softening due to the selection of favorable variants of alpha prime martensite and partial dislocation for epsilon martensite, respectively.

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