Effect of temperature on deformation and fracture behaviour of high strength rail steel

Yu, Feng; Jar, P.‐Y. Ben; Hendry, Michael T.

doi:10.1016/j.engfracmech.2015.07.039

Cited by 15 publications

(2 citation statements)

References 26 publications

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“…The Voce equation is applied from the yielding point to the UTS, whereas the Hollomon equation is used after the UTS. At the UTS point, the zeroth‐ and first‐order consistency is ensured, which is detailed in Yu et al 45 Note that conventionally the true stress–strain data from tensile tests before the UTS can be directly used in subsequent FE analysis of metals. In present paper, the true stress–strain relations are fitted before UTS, which is the premise to derive the effective true stress–strain curve by adjusting the magnitude of parameters in the fitted equation.…”

Section: Resultsmentioning

confidence: 99%

Ductile fracture of hydrostatic‐stress‐insensitive metals using a coupled damage‐plasticity model

Wang

Shen

et al. 2020

Fatigue Fract Eng Mat Struct

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In this paper, a new coupled damage‐plasticity model is proposed to predict plastic response and ductile fracture for two hydrostatic‐stress‐insensitive metals. A convenient hybrid experiment–simulation approach is designed to calibrate model parameters. Geometry transferability of model parameters is validated to various notched tensile specimens. With the characteristics of the present constitutive model, the critical damage parameter is demonstrated to be an appropriate fracture criterion, where fracture strains of various notched tensile specimens are in good agreement with experimental data. The study also reveals that there exist complementing mechanisms for the stress‐triaxiality‐dependent damage evolution and strain hardening of effective (undamaged) stress, respectively, that result in the non‐uniform distribution of overall (damaged) equivalent stress–strain curves on the minimum cross section of tensile specimens. Then, it is the combined effect of non‐uniformly distributed overall equivalent stress–strain curves that results in the phenomenon of hydrostatic‐stress insensitivity in metals.

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Section: Resultsmentioning

confidence: 99%

Ductile fracture of hydrostatic‐stress‐insensitive metals using a coupled damage‐plasticity model

Wang

Shen

et al. 2020

Fatigue Fract Eng Mat Struct

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“…[5] However, the heavier transport conditions tend to significantly increase the risk of damage and failure of rail steels. [6][7][8][9][10] Serving in complicated conditions, it is generally acceptable that the rails life is strongly related to the wear behavior, including the abrasive, adhesive, and wear mechanisms. Subjected to intensive abrasion wear, the mechanical properties of steels deteriorate significantly which results in the reduction of mass and variation in their geometric configuration.…”

Section: Introductionmentioning

confidence: 99%

Machine Learning‐Guided Design of Pearlitic Steel with Promising Mechanical and Tribological Properties

Qiao

Zhu

2021

Adv Eng Mater

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Herein, attempts have been made to design and develop pearlitic steels for application in heavy‐haul rails. The hardness plays a vital role in studying the mechanical and tribological properties, which is theoretically related to the alloying composition of steel. With aid of machine learning (ML) method, the particle swarm optimization (PSO) improved generalized regression neural network (GRNN) is utilized to model the relationship between composition and hardness of pearlitic steel. The results show that the designed steel exhibits superior hardness and mechanical properties with fine pearlite lamellar microstructure. In addition, the wear behavior of the steel and its wear mechanism are systematically studied by tribological testing and electron probe microanalysis (EPMA) observations of worn surface and wear particles. With composition optimization, the wear resistance has further improved as evidenced by the lower friction coefficient and reduction of wear volume. The pearlitic steels exhibit a combined wear mechanism including adhesive wear, abrasion, delamination, and plastic deformation. As a result, the designed steels offer high hardness with very good mechanical and tribological properties which are far superior to previously reported pearlitic steels. This work may assist in developing the appropriate composition to create the desired hardness, mechanical, and tribological properties.

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The Wear Mechanism of High-Boron, Medium-Carbon Alloy at High Temperature

Xiao-li

Jiang

et al. 2016

Trans Indian Inst Met

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Effect of temperature on deformation and fracture behaviour of high strength rail steel

Cited by 15 publications

References 26 publications

Ductile fracture of hydrostatic‐stress‐insensitive metals using a coupled damage‐plasticity model

Ductile fracture of hydrostatic‐stress‐insensitive metals using a coupled damage‐plasticity model

Machine Learning‐Guided Design of Pearlitic Steel with Promising Mechanical and Tribological Properties

The Wear Mechanism of High-Boron, Medium-Carbon Alloy at High Temperature

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