Thermal fatigue behavior of gray cast iron with striated biomimetic non-smooth surface

Tong, Xin; Zhou, Hong; Zhang, Wei; Zhang, Zhihui; Liu, Ren

doi:10.1016/j.jmatprotec.2007.12.043

Cited by 31 publications

(15 citation statements)

References 22 publications

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“…A fatigue life assessment model was developed by Norman et al 47 for the compacted graphite iron EN-GJV-400. It is based on assumptions related to an observation of fatigue microcrack initiation and propagation in compacted graphite irons at room temperature, 48,49 during thermal cycling 50 and thermomechanical fatigue. 37,51 In particular, it is assumed that the average microcrack length attained in a representative element volume follows a Paris' law expression and that the end-of-life is associated with instantaneous crack coalescence occurring at a critical average microcrack length.…”

Section: Fatigue Life Model Based On Microcrack Propagationmentioning

confidence: 99%

Thermomechanical fatigue of grey cast iron brake discs for heavy vehicles

Gigan

Norman

Ahlström

et al. 2017

Proceedings of the Institution of Mechanical Engineers, Part D:

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The development of fatigue life assessment models for vehicle components exposed to thermomechanical fatigue supports the establishing of adequate maintenance intervals that neither cause unnecessary vehicle downtime, nor jeopardize the function of the components. In modern automotive applications, braking is closely related to safety and is commonly performed with disc brakes. Failure here may result in structural damage or even breakdown and loss of lives. In the present work, the cyclic response of grey cast iron is analysed and the fatigue life of brake discs made from this material is studied by use of four different fatigue life assessment models: the Smith-Watson-Topper model, the Coffin-Manson model, and two mechanism-based damage models. Results from isothermal and thermomechanical experiments on uniaxially loaded specimens are used for calibration of the models. Finally, the models are used to assess the life of a brake disc for a simulated brake dynamometer experiment. It is found that the fatigue model parameters that are calibrated using different sets of isothermal uniaxial test data show a substantial spread. A comparison with results from full-scale brake rig experiments shows that predictions by any of the models that have been calibrated using data from a well-designed thermomechanical test are in reasonable agreement with the estimated crack initiation phase for actual brake disc lives. It can be concluded that it is not sufficient to calibrate the studied fatigue life models using isothermal uniaxial tests for predictions of thermomechanical fatigue lives.

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Section: Fatigue Life Model Based On Microcrack Propagationmentioning

confidence: 99%

Thermomechanical fatigue of grey cast iron brake discs for heavy vehicles

Gigan

Norman

Ahlström

et al. 2017

Proceedings of the Institution of Mechanical Engineers, Part D:

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“…8 shows the results as a function of the cross section. We can see that the crack on the bionic samples with the circular cross section before 600 periods for fatigue test is almost negligible, which is much better than those thermal specimens processed by laser beam [14,15], but for those with both square and rectangular cross section, the surface demonstrates the presence of some cracks. A main crack in length of 0.8 mm was initially detected on the sample with the circular cross section as the fatigue test reached 800 fatigue periods.…”

Section: Thermal Fatigue Resistancementioning

confidence: 88%

The thermal fatigue resistance of vermicular cast iron coupling with H13 steel units by cast-in process

et al. 2010

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a b s t r a c tThis paper focuses on improving the thermal fatigue resistance on the surface of vermicular cast iron coupling with inserted H13 steel blocks that had different cross sections, by cast-in processing. The microstructure of bionic units was examined by scanning electron microscope. Micro-hardness and thermal fatigue resistance of bionic samples with varied cross sections and spacings were investigated, respectively. Results show that a marked metallurgical bonding zone was produced at interface between the inserted H13 steel block and the parent material -a unique feature of the bionic structure in the vermicular cast iron samples. The micro-hardness of the bionic samples has been significantly improved. Thermal resistance of the samples with the circular cross section was the highest and the bionics sample with spacing of 2 mm spacing had a much longer thermal fatigue life, thus resulting in the improvement for the thermal fatigue life of the bionic samples, due to the efficient preclusion for the generation and propagation of crack at the interface of H13 block and the matrix.Crown

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“…The time to fracture for gray cast iron is very short, because an initial crack is easily generated by the material's internal graphitic flake . As a consequence, the life prediction results of the previous conventional equations, which are used successfully for the predictions of steels and aluminiums, may provide unreliable results for gray cast iron.…”

Section: Evaluation Of Life Prediction Methods For Gray Cast Iron At mentioning

confidence: 99%

“…The time to fracture for gray cast iron is very short, because an initial crack is easily generated by the material's internal graphitic flake. [30][31][32] As a consequence, the life prediction results of the previous conventional equations, [21][22][23][24][25][26][27][28][29] which are used successfully for the predictions of steels and aluminiums, may provide unreliable results for gray cast iron. Table 1 shows the amount of data falling into the boundary of E f (s = 3) and its calculated fraction of the total amount of low-cycle fatigue data for gray cast iron.…”

Section: Evaluation By Fractionmentioning

confidence: 99%

A comparison of methods for predicting the fatigue life of gray cast iron at elevated temperatures

Lee

2015

Fatigue Fract Eng Mat Struct

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High temperature fatigue life tests were compared with various life assessment methods for gray cast iron in the cylinder liners of marine engines. The plastic strain range‐based methods such as the universal slopes method, Mitchell's method, Bäumel and Seeger's method, and Ong's method were not predicted well. A method employing tensile energy density, which is defined as the sum of the tensile area of the plastic energy and the elastic energy in the hysteresis loop, was suggested as an improved alternative to the plastic strain range‐based methods. The life estimation equation using tensile energy density predicted well within the 3X scatter band at various temperature ranges of the gray cast iron.

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Thermal fatigue behavior of gray cast iron with striated biomimetic non-smooth surface

Cited by 31 publications

References 22 publications

Thermomechanical fatigue of grey cast iron brake discs for heavy vehicles

Thermomechanical fatigue of grey cast iron brake discs for heavy vehicles

The thermal fatigue resistance of vermicular cast iron coupling with H13 steel units by cast-in process

A comparison of methods for predicting the fatigue life of gray cast iron at elevated temperatures

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