EFFECT OF PLASMA NITRIDING ON THE NOTCH TOUGHNESS OF SPRING STEEL

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60162694%3AG43__%2F16%3A00532674" target="_blank" >RIV/60162694:G43__/16:00532674 - isvavai.cz</a>
Result on the web
<a href="http://www.metal2016.com/cz/" target="_blank" >http://www.metal2016.com/cz/</a>
DOI - Digital Object Identifier
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Result language
angličtina
Original language name
EFFECT OF PLASMA NITRIDING ON THE NOTCH TOUGHNESS OF SPRING STEEL
Original language description
Specimens made from spring steel 54SiCr6 were nitrided using various parameters of plasma nitriding in order to achieve a layer of variable thickness. The microstructure, phase constitution, hardness and case hardness depth were investigated. Subsequently notch toughness was measured by the instrumented Charpy impact test on 10x10x55 mm test specimens with U-notch 5 mm depth. Instrumented Charpy impact test was carried out at -40 °C, +21 °C and +70 °C. Results of notch toughness were correlated with the structure, chemical composition and the depth of the nitrided layers both on the surface and especially in Unotch of specimens. In the end the fractographic analysis of fracture surfaces were carried out. The notch toughness is negatively influenced as a result of presence of a nitrided layer on the surface of root of Unotch and decrease again as the thickness of nitrided layer increases and with decrease in temperature. It turned out, if the nitrided layer in root of U-notch was “sufficiently” thick, the crack spread had unstable course. The change of the character of the crack spread was also influenced by temperature.
Czech name
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Czech description
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Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2016
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection
METAL 2016, 25th Anniversary International Conference on Metallurgy and Materials
ISBN
978-80-87294-67-3
ISSN
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e-ISSN
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Number of pages
8
Pages from-to
1037-1044
Publisher name
TANGER Ltd., Keltickova 62, 710 00 Ostrava, Czech Republic, EU
Place of publication
Ostrava, Czech Republic, EU
Event location
Brno, Czech Republic, EU
Event date
May 25, 2016
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
000391251200168

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