Abstract

Here are presented results of experimental investigation about effect of inclusions on the fatigue strength of a bearing steel 100Cr6. Fatigue tests were carried out at sinusoidal cyclic tension-compression loading, f = 190 Hz, R = −1, room temperature, in the region ranged from N ≈ 3.5 × 105 to N ≈ 1.0 × 108 cycles of loading. Initiation of the fatigue cracks was observed in the bulk of the tested specimens and the so-called “fish eyes” were observed, mainly on the TiN inclusions (66 % Ti, 19 % N, 9 % Cr, remainder Fe, V, Zr). The TiN inclusions are hard, with sharp edges causing a significant stress concentration in a small localized area, resulting in an initiation of a fatigue crack. On the other hand, in standard for the chemical composition of this steel, the content of Ti was not prescribed.

Details

Title
Effect of inclusions on the fatigue strength of a bearing steel
Author
Nový, F 1 ; Bokůvka, O 1 ; Vicen, M 1 ; Činčala, M 2 ; Nikolić, R 1 

 University of Žilina, Univerzitná 1, 010 26 Žilina, Slovakia 
 Volkswagen a. s., Priemyselná 1/9042, 036 01 Martin, Slovakia 
Publication year
2021
Publication date
Aug 2021
Publisher
IOP Publishing
ISSN
17578981
e-ISSN
1757899X
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
2577068612
Copyright
© 2021. This work is published under http://creativecommons.org/licenses/by/3.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.