Benefits of use of acoustic emission in scratch testing

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F20%3A73602018" target="_blank" >RIV/61989592:15310/20:73602018 - isvavai.cz</a>

Alternative codes found

RIV/68378271:_____/20:00537563

Result on the web

<a href="https://ojs.cvut.cz/ojs/index.php/APP/article/view/6704" target="_blank" >https://ojs.cvut.cz/ojs/index.php/APP/article/view/6704</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.14311/APP.2020.27.0121" target="_blank" >10.14311/APP.2020.27.0121</a>

Result language

angličtina

Original language name

Benefits of use of acoustic emission in scratch testing

Original language description

Scratch test is regularly used for assessment of cohesive and adhesive strength of thin films and coatings. By default, its evaluation is based on analysis of depth-load-time record and microscopic observation of residual scratch groove. The visual analysis of the residual groove provides the most detailed description of the final damage of the surface (crack patterns, extent of plastic deformation, delamination, etc.), but it may be a time demanding approach. Although the continuous recording of indenter penetration depth and applied load offers instantaneous information about the performance of the tested material, it may not provide sufficient description of the sample’s deformation behaviour. Therefore, other complementary techniques for description of the deformation response to scratch loading are desirable. Continuous recording of acoustic emissions (AE) generated during the test could be a possible solution. It is especially the ability of AE method to detect the very first and even subsurface failures of the material that is of the most importance and otherwise inaccessible by standardly used techniques. What is more, it is a non-destructive and real-time method. In principle, AE method can be beneficially employed for a wide range of materials explored via scratch test. The strength of the AE analysis of the nano/micro scratch test will be demonstrated on various types of materials including optical thin films, durable metal and hard ceramic films as well as bulk laser cladding. Selected phenomena and features of the use of AE during scratch testing will be presented, including effect of scratch load on character of AE records (burst vs. continuous) for TiO2 on glass, subsurface damage of SiC films on silicon and selective failure of hard carbide phase embedded in a metal matrix in case of laser re-melted layers.

Czech name

—

Czech description

—

Type

D - Article in proceedings

CEP classification

—

OECD FORD branch

20504 - Ceramics

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

2336-5382

e-ISSN

—

Number of pages

5

Pages from-to

121-125

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

—