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Evaluation of temperature‐sensitive fatigue crack propagation of a high‐speed railway wheel rim material
Author(s) -
Fang XiuYang,
Cai ZhenBing,
Wang JunGuo,
Yang XuFeng
Publication year - 2019
Publication title -
fatigue and fracture of engineering materials and structures
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.887
H-Index - 84
eISSN - 1460-2695
pISSN - 8756-758X
DOI - 10.1111/ffe.13021
Subject(s) - materials science , tearing , fracture mechanics , crack closure , brittleness , lamellar structure , transition temperature , structural engineering , composite material , transition point , paris' law , point (geometry) , mechanics , engineering , geometry , condensed matter physics , superconductivity , physics , mathematics
The fatigue crack growth rate (FCGR) of ER8C high‐speed railway wheel rim material was tested at various service temperatures. The temperature sensitivity of fatigue crack propagation was evaluated, and the effect of temperature on the crack propagation mechanism was analyzed. The obtained results indicate a fatigue ductile‐to‐brittle transition (FDBT) point at −20°C for the ER8C wheel rim materials. A reverse relationship was found between FCGR and temperature for the near threshold and Paris regimes when the temperature was below the FDBT point. However, no evident changing rule was found when the temperature was above this transition point. An evident fatigue crack propagation mode transition was found from lamellar tearing to intergranular cracks, which was related to the FDBT for the near‐threshold regime.