Renata Latypova - Academia.edu (original) (raw)
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Papers by Renata Latypova
Materials and Corrosion, 2018
This paper presents a novel TFT (Tuning Fork Test) stress corrosion testing method, which was dev... more This paper presents a novel TFT (Tuning Fork Test) stress corrosion testing method, which was developed for classifying martensitic high-strength steels. The novel method was developed by applying finite element calculations to optimize a tuning fork geometry to enable accurate stress adjustment with simple inexpensive equipment. Different steels were exposed to cathodic hydrogen charging conditions with various elastic tensile stress levels that were achieved by displacement control. All steels exhibited hydrogen-induced stress corrosion cracking after exceeding a material-specific threshold stress level that decreased linearly with increasing hardness.
Corrosion, 2020
Hydrogen embrittlement is a well-known problem with high-strength steels. An important aspect of ... more Hydrogen embrittlement is a well-known problem with high-strength steels. An important aspect of hydrogen embrittlement research is the effect of the prior austenite grain (PAG) structure on hydrogen-induced fracture. The microstructural anisotropy of PAG structure depends on the steel manufacturing process. In this study, 500 HBW martensitic steels with different PAG structures are investigated with a novel tuning-fork test that utilizes an integrated loadcell system. The loadcell clamping system is used during hydrogen charging, allowing tracking of the applied force throughout the tests, which enables detection of separate phases of cracking and time-to-fracture. The elongated PAG morphology produces different results depending on the crack path direction in relation to the rolling direction, whereas the equiaxed PAG morphology does not manifest an orientation dependence. Depending on the PAG shape, also the fracture morphology differs. Time-to-fracture results show that elongate...
Materials and Corrosion, 2018
This paper presents a novel TFT (Tuning Fork Test) stress corrosion testing method, which was dev... more This paper presents a novel TFT (Tuning Fork Test) stress corrosion testing method, which was developed for classifying martensitic high-strength steels. The novel method was developed by applying finite element calculations to optimize a tuning fork geometry to enable accurate stress adjustment with simple inexpensive equipment. Different steels were exposed to cathodic hydrogen charging conditions with various elastic tensile stress levels that were achieved by displacement control. All steels exhibited hydrogen-induced stress corrosion cracking after exceeding a material-specific threshold stress level that decreased linearly with increasing hardness.
Corrosion, 2020
Hydrogen embrittlement is a well-known problem with high-strength steels. An important aspect of ... more Hydrogen embrittlement is a well-known problem with high-strength steels. An important aspect of hydrogen embrittlement research is the effect of the prior austenite grain (PAG) structure on hydrogen-induced fracture. The microstructural anisotropy of PAG structure depends on the steel manufacturing process. In this study, 500 HBW martensitic steels with different PAG structures are investigated with a novel tuning-fork test that utilizes an integrated loadcell system. The loadcell clamping system is used during hydrogen charging, allowing tracking of the applied force throughout the tests, which enables detection of separate phases of cracking and time-to-fracture. The elongated PAG morphology produces different results depending on the crack path direction in relation to the rolling direction, whereas the equiaxed PAG morphology does not manifest an orientation dependence. Depending on the PAG shape, also the fracture morphology differs. Time-to-fracture results show that elongate...