High-speed mechanical mapping of blended cement pastes and its comparison with standard modes of nanoindentation

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F20%3A00340178" target="_blank" >RIV/68407700:21110/20:00340178 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68407700:21220/20:00340178

Výsledek na webu

<a href="https://doi.org/10.1016/j.mtcomm.2019.100806" target="_blank" >https://doi.org/10.1016/j.mtcomm.2019.100806</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.mtcomm.2019.100806" target="_blank" >10.1016/j.mtcomm.2019.100806</a>

Jazyk výsledku

angličtina

Název v původním jazyce

High-speed mechanical mapping of blended cement pastes and its comparison with standard modes of nanoindentation

Popis výsledku v původním jazyce

The paper presents a new nanoindentation mode of accelerated property mapping (XPM) which is designed to access local mechanical property maps in the order of minutes, i.e. much faster than with standard modes of grid nanoindentation or modulus mapping. XPM is tested on three typical cementitious samples: cement paste, fly-ash and slag blended cement pastes. The results from the techniques were found quantitatively comparable in terms of local mechanical properties. The methods are characterized by different spatial resolution, different property fluctuations and acquisition times. High-speed loading in XPM brings strain rate effects that are not present in standard modes. The paper summarizes advantages and disadvantages of each technique and shows mutual comparisons for the tested composites. It is concluded that the new XPM mode brings an advantage of very fast characterization of heterogeneous composites with reasonably high spatial resolution. The quantitativeness of the method is disturbed by strain rate effects causing artificial shift of the properties towards higher values compared to static loading cases. Some parameters associated with longer acquisition times such as creep properties are not captured with XPM. XPM is especially suited for fast sensing of local differences between composite phases on smaller areas (~103μm2). Statistical data from larger sample areas (104-105μm2) are still easier obtainable from classical grid nanoindentation.

Název v anglickém jazyce

High-speed mechanical mapping of blended cement pastes and its comparison with standard modes of nanoindentation

Popis výsledku anglicky

The paper presents a new nanoindentation mode of accelerated property mapping (XPM) which is designed to access local mechanical property maps in the order of minutes, i.e. much faster than with standard modes of grid nanoindentation or modulus mapping. XPM is tested on three typical cementitious samples: cement paste, fly-ash and slag blended cement pastes. The results from the techniques were found quantitatively comparable in terms of local mechanical properties. The methods are characterized by different spatial resolution, different property fluctuations and acquisition times. High-speed loading in XPM brings strain rate effects that are not present in standard modes. The paper summarizes advantages and disadvantages of each technique and shows mutual comparisons for the tested composites. It is concluded that the new XPM mode brings an advantage of very fast characterization of heterogeneous composites with reasonably high spatial resolution. The quantitativeness of the method is disturbed by strain rate effects causing artificial shift of the properties towards higher values compared to static loading cases. Some parameters associated with longer acquisition times such as creep properties are not captured with XPM. XPM is especially suited for fast sensing of local differences between composite phases on smaller areas (~103μm2). Statistical data from larger sample areas (104-105μm2) are still easier obtainable from classical grid nanoindentation.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20101 - Civil engineering

Projekt

<a href="/cs/project/GA17-05360S" target="_blank" >GA17-05360S: Lomové vlastnosti amorfních a krystalických materiálů stanovené pomocí nanoindentace a fokusovaného iontového svazku v malém měřítku</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2020

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Materials Today Communications

ISSN

2352-4928

e-ISSN

—

Svazek periodika

23

Číslo periodika v rámci svazku

June

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

15

Strana od-do

—

Kód UT WoS článku

000536946500004

EID výsledku v databázi Scopus

2-s2.0-85079689424