Rolling and Rolling-Sliding Contact Fatigue Failure Mechanisms in 32 CrMoV 13 Nitrided Steel—An Experimental Study
| Autor: | António Castanhola Batista, Joao P. Nobre, Maria José Marques, Luís Manuel de Jesus Coelho |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Technology
Materials science QH301-705.5 rolling contact fatigue QC1-999 Rolling contact fatigue Residual stress General Materials Science Composite material Biology (General) Instrumentation QD1-999 Fluid Flow and Transfer Processes Process Chemistry and Technology Physics General Engineering fatigue failure mechanisms Spall Engineering (General). Civil engineering (General) nitriding Computer Science Applications X-ray diffraction Contact fatigue Chemistry residual stresses Crack initiation Rolling sliding TA1-2040 Nitriding |
| Zdroj: | Applied Sciences Volume 11 Issue 21 Applied Sciences, Vol 11, Iss 10499, p 10499 (2021) |
| ISSN: | 2076-3417 |
| DOI: | 10.3390/app112110499 |
| Popis: | The aim of this work is to characterize the rolling and rolling-sliding contact fatigue failure mechanisms on the 32CrMoV13 nitrided steel. During rolling contact fatigue tests (RCF), two general features were observed: specimens presenting short lives and rough and sharpened spalling damage and specimens presenting long lives and only microspalling marks. It was possible to determine a contact fatigue limit of 3 GPa. During rolling-sliding contact fatigue tests (RSCF), a clearly different behaviour between the two specimens in contact has been observed: the driver shows circumferential and inclined cracks and only inclined cracks appear in the follower. This behaviour can be understood if the effect of the residual stress state in near-surface layers is considered. Before RCF tests, the residual stresses are compressive in all near-surface layers. After RCF tests, strong residual stress relaxation and even reversing behaviour was observed in the axial direction, which facilitates the surface crack initiation in the circumferential direction at rolling track borders. |
| Databáze: | OpenAIRE |
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