Počet záznamů: 1
Corrosion fatigue lifetime assessment of high-speed railway axle EA4T steel with artificial scratch
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SYSNO ASEP 0544864 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Corrosion fatigue lifetime assessment of high-speed railway axle EA4T steel with artificial scratch Tvůrce(i) Hu, Y. (CN)
Wu, S. (CN)
Withers, P.J. (GB)
Cao, H. (GB)
Chen, P. (CN)
Zhang, Y. (CN)
Shen, Z. (GB)
Vojtek, Tomáš (UFM-A) ORCID
Hutař, Pavel (UFM-A) RID, ORCIDCelkový počet autorů 9 Číslo článku 107588 Zdroj.dok. Engineering Fracture Mechanics. - : Elsevier - ISSN 0013-7944
Roč. 245, MAR (2021)Poč.str. 13 s. Jazyk dok. eng - angličtina Země vyd. GB - Velká Británie Klíč. slova High cycle fatigue ; Defect-tolerant design ; Crack initiation and propagation ; Stress corrosion cracking ; High-speed railway axles Vědní obor RIV JG - Hutnictví, kovové materiály Obor OECD Materials engineering Způsob publikování Open access Institucionální podpora UFM-A - RVO:68081723 UT WOS 000633033100004 EID SCOPUS 85100990592 DOI https://doi.org/10.1016/j.engfracmech.2021.107588 Anotace The effects of environment (in air and 3.5 wt% NaCl solution) and artificially-induced surface scratches are investigated on the fatigue properties of railway EA4T (also called 25CrMo4) alloy steel. This steel is found to be markedly sensitive to the chloride-containing environment, with cracking at stresses two thirds of the in-air fatigue limit (+/-326 MPa) under rotating bending (Wohler) tests. The scratched specimens show even shorter lifetime at stresses below 300 MPa and no fatigue limit is found down to 100 MPa. The fracture surfaces are characterized by the initiation of cracks from multiple sources and intergranular cracking. The fatigue failure of smooth specimens tends to initiate from localized corrosion pitting, while the corrosive environment facilitates crack initiation without pitting for scratched specimens. The fatigue crack growth rate in NaCl solution is slightly higher than that in air. Within the framework of defect-tolerant design, El-Haddad modified Kitagawa-Takahashi (KT) diagrams are constructed to explore the variation in fatigue strength and the defect assessment for both conditions. The modified KT model, which takes the short crack behavior into account, is in better agreement with the experimental results than the original KT diagrams. Pracoviště Ústav fyziky materiálu Kontakt Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485 Rok sběru 2022 Elektronická adresa https://www.sciencedirect.com/science/article/pii/S001379442100059X?via%3Dihub
Počet záznamů: 1