Fracture toughness of medium-high carbon steel for railroad wheel

Sakamoto, Haruo; Toyama, Kenzo; Hirakawa, Kenji

doi:10.1016/s0921-5093(00)00648-1

Cited by 27 publications

(13 citation statements)

References 3 publications

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“…Liang et al [11] reported that the size of the austenite grain and pearlite colony increased with the austenitizing temperature, while the impact toughness increased as the prior austenite grain size decreased. Sakamoto et al [12] found that refining the austenite grain can effectively improve the fracture toughness of medium-high carbon steels, whereas Kavishe et al [13] reported that the influence of the prior austenite grain size on plane strain fracture toughness is insignificant.In the above-mentioned studies, the dependences of the mechanical properties of pearlitic steels on the parameters of their structure were determined by traditional methods, namely, impacts, tension, and dynamic bending of the samples. However, there are conflicting results in the literature about the relationship between the toughness and the size of the prior austenite grains and pearlite colonies.…”

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Study on the Nucleation and Growth of Pearlite Colony and Impact Toughness of Eutectoid Steel

Zhang

Zhao

Tan

et al. 2019

Metals

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The relationship between microstructure parameters and mechanical properties was studied in this paper. The steel was heat-treated at different austenitizing temperatures to acquire varying microstructure. The results showed that austenite grain size increases with austenitizing temperature, while the pearlite colony size was relatively constant. The strength followed a Hall-Petch relationship with the austenite grain size, but the austenite grain size has nothing to do with the impact toughness. The control unit for determining the impact toughness of pearlitic steel is the pearlite colony size using a comparison method. Further studies have found that, in the hypoeutectoid steel and hypereutectoid steel, the pearlite colony size changes with the austenitizing temperature. However, when the eutectoid steel with a carbon content of 0.81% undergoes the isothermal transformation, the number of grain boundary precipitates is very few. There are many nucleation sites at the grain boundary. The pearlite colonies randomly nucleate at the grain boundaries and grow into the interior of the grains. Simultaneously, new pearlite colonies nucleate by the side of the existing pearlite colony. The intragranular pearlite colonies are also randomly nucleated. These nucleation sites increase the chance of the growing pearlite colonies colliding with each other, eventually resulting in a constant pearlite colony size. its toughness. However, it was known [10] that the toughness was mainly determined by the size of the initial austenite grain, rather than by the size of the pearlite colonies. Liang et al. [11] reported that the size of the austenite grain and pearlite colony increased with the austenitizing temperature, while the impact toughness increased as the prior austenite grain size decreased. Sakamoto et al. [12] found that refining the austenite grain can effectively improve the fracture toughness of medium-high carbon steels, whereas Kavishe et al. [13] reported that the influence of the prior austenite grain size on plane strain fracture toughness is insignificant.In the above-mentioned studies, the dependences of the mechanical properties of pearlitic steels on the parameters of their structure were determined by traditional methods, namely, impacts, tension, and dynamic bending of the samples. However, there are conflicting results in the literature about the relationship between the toughness and the size of the prior austenite grains and pearlite colonies. There are also few studies on the size of pearlite colonies, and these are short of definite conclusions. Therefore, the primary objective of the present work was to clarify the structure-property relationships. The formation process of the pearlite colony and the control unit of impact toughness were systematically studied in this paper.

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Study on the Nucleation and Growth of Pearlite Colony and Impact Toughness of Eutectoid Steel

Zhang

Zhao

Tan

et al. 2019

Metals

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“…The manganese rich stainless steels are also non-magnetic, and their combination of low susceptibility and low thermal expansion has been exploited in certain special cryogenic applications. 1 Sakamoto et al 7 have showed that the fracture toughness of the mediumhigh carbon alloy for railroad wheels can be increased by adding an appropriate quantity of Mn. These steels have the high work hardening ability under high stress or severe impact-loading conditions, 8 which makes them suitable to resist wear damage.…”

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Modeling the impact–sliding wear characteristics of rare earth additive iron-based hardfacing alloys

Singla

Dwivedi

Arora

2017

Proceedings of the Institution of Mechanical Engineers, Part J:

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This paper presents a systematic study of the effect of the cerium oxide content on the mechanical, microstructural and tribological properties of iron-based alloys. The results indicate that the microstructure of the hardfaced alloys is mainly composed of austenite, MC and M7C3 carbides. The primary austenite grain size was refined at first and then coarsened with the increase of the rare earth oxide additions. Meanwhile, the hardness of the hardfacing alloy was also increased. The increased area fraction of carbides was found to be beneficial for enhanced wear resistance. A statistical regression model was developed and verified with a number of test cases in order to evaluate the adequacy of the model. The optimal amount of rare earth was found to be less than 6 wt.%; below this composition, the microstructural, mechanical and tribological properties were excellent.

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“…However, poor ductility and toughness as well as inferior weld ability are always keeping a lid on their further utilisations [1][2][3][4]. Recently, a novel bimetal consisting of hypo eutectoid pearlitic steel (PS) and low carbon steel (LCS) was developed to overcome those shortcomings by absorbing the advantages (i.e.…”

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confidence: 99%

Constitutive analysis for hot deformation behaviour of novel bimetal consisting of pearlitic steel and low carbon steel

Gao

Jiang

Wei

et al. 2014

Materials Science and Engineering: A

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Fracture toughness of medium-high carbon steel for railroad wheel

Cited by 27 publications

References 3 publications

Study on the Nucleation and Growth of Pearlite Colony and Impact Toughness of Eutectoid Steel

Study on the Nucleation and Growth of Pearlite Colony and Impact Toughness of Eutectoid Steel

Modeling the impact–sliding wear characteristics of rare earth additive iron-based hardfacing alloys

Constitutive analysis for hot deformation behaviour of novel bimetal consisting of pearlitic steel and low carbon steel

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