Why monitor acoustic emissions during nanomechanical tests?

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F20%3A73602038" target="_blank" >RIV/61989592:15310/20:73602038 - isvavai.cz</a>

Alternative codes found

RIV/68378271:_____/20:00537579

Result on the web

<a href="https://ojs.cvut.cz/ojs/index.php/APP/article/view/6705/5747" target="_blank" >https://ojs.cvut.cz/ojs/index.php/APP/article/view/6705/5747</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.14311/APP.2020.27.0126" target="_blank" >10.14311/APP.2020.27.0126</a>

Result language

angličtina

Original language name

Why monitor acoustic emissions during nanomechanical tests?

Original language description

Acoustic Emissions (AE) monitoring has been proved as an effective non-destructive technique at the macro scale. Nevertheless, it may also be employed at nano/micro scale during nanomechanical and nanotribological testing. Local mechanical properties of surfaces or micro object are routinely explored using nanoindentation, scratch test or dynamic impact tests that are evaluated based on analysis of depth-load-time records or microscopic observation of residual indents, scratch grooves or impact craters, respectively. Although these approaches have been proven to be sufficient in most cases for a variety of materials, there are many situations where they do not provide sufficient information for a complex understanding of the deformation response. On the other hand, analysis of AE signals generated during these tests may provide valuable complementary information and provide some insight into the dynamics of phenomena like cracking, phase transitions, plastic instabilities, etc. That means that the analysis of acoustic emissions provides a better understanding and more complex interpretation of the results obtained by the above-mentioned tests. The strength of the AE based method is demonstrated for optical thin films deposited on glass tested via scratch test. Combination of AE and nanoindentation will be presented for various types of glasses. The complementary analysis of the time and frequency domain will draw the potential of the AE extended approach. Especially dynamics of the failure and fracture processes will be distinguished and elucidated. In both cases the analysis of AE events will be correlated with standard approaches.

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

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OECD FORD branch

10306 - Optics (including laser optics and quantum optics)

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

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

Publication year

2020

Confidentiality

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

Article name in the collection

14th International conference on Local mechanical properties - LMP 2019

ISBN

978-80-01-06735-2

ISSN

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e-ISSN

2336-5382

Number of pages

5

Pages from-to

126-130

Publisher name

ČVUT v Praze

Place of publication

Praha

Event location

Praha

Event date

Nov 6, 2019

Type of event by nationality

EUR - Evropská akce

UT code for WoS article

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