Modification of steel surfaces induced by turning: non-destructive characterization using Barkhausen noise and positron annihilation

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F14%3A10288261" target="_blank" >RIV/00216208:11320/14:10288261 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1088/0022-3727/47/44/445301" target="_blank" >http://dx.doi.org/10.1088/0022-3727/47/44/445301</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1088/0022-3727/47/44/445301" target="_blank" >10.1088/0022-3727/47/44/445301</a>

Result language
angličtina
Original language name
Modification of steel surfaces induced by turning: non-destructive characterization using Barkhausen noise and positron annihilation
Original language description
This paper deals with the characterization of sub-surface damage caused by the machining of 100Cr6 roll bearing steel. The samples turned using tools with variable flank wears were characterized by two non-destructive techniques sensitive to defects introduced by plastic deformation: magnetic Barkhausen noise and positron annihilation. These techniques were combined with light and electron microscopy, x-ray diffraction and microhardness testing. The results of the experiment showed that damage in the sub-surface region increases with increasing flank wear, but from a certain critical value dynamic recovery takes place. The intensity of Barkhausen noise strongly decreases with increasing flank wear due to the increasing density of the dislocations pinning the Bloch walls and suppressing their motion. This was confirmed by positron annihilation spectroscopy, which enables the determination of the dislocation density directly. Hence, a good correlation between Barkhausen noise emission an
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
BM - Solid-state physics and magnetism
OECD FORD branch
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Project
<a href="/en/project/GA13-09436S" target="_blank" >GA13-09436S: Non-destructive mapping of spatial distribution of defects in highly strained materials</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2014
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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