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Pop-in Behavior during Nanoindentation on Steel Alloy

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I thank you for this interesting presentation on did you try to correlate the values of the force displacement 1st
the pop scene on the actual energies of the events of you mentioned like inflation license on my because this could be very useful input for herself system well yet still actually so that in my evidence so I think I did of the development of the Kasey getting call themselves but the starting point is the motivation of this name individual the old intrinsic property of these chemical properties hard so we must consider the very complex complexes mechanical behavior but I mean that the Indonesian side so that means that you might ,comma necessary dislocation and the soda pop and behaviors very complex at this moment so I want to obtained that the appropriate the input data for sheep European but it is always it's not easy it to be believed that this kind of thing that you from we can this official question from about
200 times since the area of forced displacement Coke can be
considered as will all energy do you think it will be possible to "quotation mark debate if we beat them in the different types of transformation and the effect we his so since the area of forced displacement gathered because of me can be considered as the ball more energy but do you think that it would be possible to 183 did mean that different cut off consummated energy of on the home other members exactly the the
transformation and so anyway for the variance selection then so we must to consider the mechanical interest energy and love between
India and the oppressed us and say that with this strange that the transformation strange so I think the afforded principal variant that outside India it is stated that the same a chemical chemical free energy from also I too much insight so honeymoon but Senate so we're supposed to have a university endowment and so I think had yet the question about the
studies so the US about the use the anymore because studies Asian during the and then the
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I wanted to get out the relationship between discontinuous yielding intention and and the pop
and it compression here and so how good is so we have still is that you have continuous yielding and discontinues yielding a man and continues yielding with variations in the amount in a macroscopic tension tests of how how good is the correspondents the screen what you would measure in indentation to what you would predict intention when you look at that spectrum of yield 21 editions V-J Day a very small specimen of a macroscopic material and predicts and understand it is you want to to show the kitchen so I like to do that so I tried it but the narrow indentation is assessed to just 1 point data about the depends just on macroscopic data so it's not easy to cold-call correlate this between the tool to mechanical properties such only in thing is the lower the relationship between them is valid but the quantity believed in In the matches this is not to that I think it is more than 2 1 question I think that I have is that this man pressure because of that we
always try to use them because economists and 2 related that your students and vocal also passed through them Nato intended we also try to get something and fall at
the minute practical peacemaking in variety we also I tried to get such information in order to move to by other people mission behavior so that by case you have any from subject companies that many middle pop Kopitar infrastructure so so maybe we can relate the and they go and they don't get her fatherless they'd have to the EU stress some do you have any idea to go out to the Cumbre to add to the assessment message so make this case and that means that the calculation you up but at this moment the mold but so so no money in others the high-priced deals there had been adult can't contains a better structure the various pages still fighting in our indentation that we can't mentally the intrinsic property we each phase and we can compare the 2 properties so it is reasonable I think but macroscopic and microscopic valued at between the microscope therein Annabelle used quite a big difference at this moment so we can compare the 2 page was replaced this is a mechanical properties
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Metadaten

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

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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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