Subcritical crack growth in hard alloys under cyclic loading
- In this work, the subcritical crack growth in Fe-, Ni- and Co-base hard alloys was investigated. Specimens were cyclically loaded in the pressure threshold range until a ring crack resulted as a failure criterion. Crack propagation along with the individual microstructural constituents and the associated resistance of the individual materials to crack propagation was investigated by scanning electron microscopy and by the methods adapted to it. For the Ni-base alloys, the formation of a closed ring fracture occurred after the lowest load cycle number, followed by the Co- and Fe-base alloys. Almost no crack deflection by the hard phases was detected in the Ni-base alloys. The higher number of loading cycles to produce a closed crack ring in the Fe-base alloys is attributed to the pronounced crack deflection by the hard phases and to the higher matrix strength. Besides, phase transformations were registered in front of the crack tip of the Co- and the partially austenitic Fe-base alloy. This phase transformation counteracts crack formation in the case of the Fe-base matrix but promotes crack propagation in the Co-base alloy.
Author: | Lukas BrackmannORCiDGND, Arne RöttgerORCiDGND, Sebastian WeberORCiDGND, Werner TheisenGND |
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URN: | urn:nbn:de:hbz:294-110349 |
DOI: | https://doi.org/10.1111/ffe.13363 |
Parent Title (English): | Fatigue & fracture of engineering materials & structures |
Publisher: | Wiley |
Place of publication: | Weinheim |
Document Type: | Article |
Language: | English |
Date of Publication (online): | 2024/03/11 |
Date of first Publication: | 2020/10/08 |
Publishing Institution: | Ruhr-Universität Bochum, Universitätsbibliothek |
Tag: | hard alloys; mechanized tunnelling; subcritical crack growth; wear |
Volume: | 44 |
Issue: | 2 |
First Page: | 349 |
Last Page: | 365 |
Note: | Dieser Beitrag ist auf Grund des DEAL-Wiley-Vertrages frei zugänglich. |
Institutes/Facilities: | Institut für Werkstoffe, Lehrstuhl Werkstofftechnik |
Dewey Decimal Classification: | Technik, Medizin, angewandte Wissenschaften / Ingenieurwissenschaften, Maschinenbau |
open_access (DINI-Set): | open_access |
faculties: | Fakultät für Maschinenbau |
Licence (English): | Creative Commons - CC BY-NC 4.0 - Attribution-NonCommercial 4.0 International |