Influence of quenching strategy on phase transformation and mechanical properties of low alloy steel

Bansal, Gaurav; Tripathy, S. Swarupa; Chandan, Avanish Kumar; Rajinikanth, V.; Ghosh, Chiradeep; Srivastava, V. C.; Chowdhury, Sandip Ghosh

doi:10.1016/j.msea.2021.141937

Cited by 14 publications

(8 citation statements)

References 77 publications

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“…The increase in tempering temperature provided energy for atomic diffusion, and the further diffusion of carbon (C) atoms made the prior austenite grain boundaries and martensitic lath boundaries become the main C atom segregation areas. In addition, C atoms were also prone to migrating to dislocations and interact with dislocations to reduce lattice distortion, thereby reducing the system energy and making the system more stable [31,[34][35][36].…”

Section: Effect Of Tempering Temperature On Microstructurementioning

confidence: 99%

Effect of Quenching and Tempering on Mechanical Properties and Impact Fracture Behavior of Low-Carbon Low-Alloy Steel

Yang

Xiao

Luo

et al. 2022

Metals

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Conventional quenching and tempering were employed to achieve the optimal strength and toughness of low-carbon low-alloy steel. The fracture behavior (crack initiation and propagation) of the steel in the impact process was also analyzed. It was found that the microstructures of the steel after different tempering treatments were mainly composed of martensite, and its mechanical properties were dependent on the tempering temperature. With the increase in tempering temperature, martensitic laths merged and coarsened. Moreover, recovery occurred, causing a decrease in dislocation density. Subsequently, the strength of the steel gradually decreased, and the impact energy increased. When the tempering temperature was 600 °C, the optimal yield strength (557 MPa) and the impact energy (331 J) were achieved. In addition, high angle grain boundaries (HAGBs) affected the impact energy and crack propagation. Cracks were easily deflected when they encountered high angle grain boundaries, and linearly expanded when they encountered low angle grain boundaries (LAGBs).

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Section: Effect Of Tempering Temperature On Microstructurementioning

confidence: 99%

Effect of Quenching and Tempering on Mechanical Properties and Impact Fracture Behavior of Low-Carbon Low-Alloy Steel

Yang

Xiao

Luo

et al. 2022

Metals

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“…In the dual-phase region, carbides began to dissolve, and austenite rapidly nucleated, grew, and connected with each other around the dissolved carbides along the boundary of the original martensite lath until they covered the entire boundary. [34,35] Regarding the lower bainite in the original microstructure, carbides have been directionally precipitated in the ferrite strip, which played a role in consolidating the ferrite strip. Therefore, the dual-phase microstructure of SLM 24CrNiMo low-alloy steel was austenitic-ferrite dual-phase microstructure, and martensite-ferrite microstructure was obtained after quenching.…”

Section: Microstructurementioning

confidence: 99%

Effects of Dual‐Phase Region Quenching Treatment on Microstructure and Mechanical Properties of 24CrNiMo Low‐Alloy Steel Prepared by Selective Laser Melting

Cui,

Wang,

Wang

et al. 2023

steel research int.

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In this paper, 24CrNiMo low alloy steel was successfully prepared using selective laser melting (SLM) technology. Effects of dual phase region quenching treatment on microstructure and mechanical properties of SLM 24CrNiMo low alloy steel were analyzed. The results showed that after three kinds of dual phase region quenching treatment, different martensite ‐ ferrite dual phase microstructure of the as‐quenched alloy steel was obtained. In the range of austenitizing temperature from 760°C to 820°C, the content and size of the ferrite decreased, on the contrary, the content and size of the martensite increased. Furthermore, with the austenitizing temperature increasing, the morphology of the ferrite gradually changed from acicular ferrite + polygonal ferrite to acicular ferrite, while the lath characteristics of the martensite became more and more obvious. For EBSD results, with increasing the quenching temperature, the crystallographic morphology gradually changed from columnar grains to equiaxed grains, meanwhile, the extreme value of texture strength and the average size of grains were both decreased. When the austenitizing temperature was 820°C, the microhardness and tensile strength of the as‐quenched alloy steel were much higher than that of the as‐deposited alloy steel.This article is protected by copyright. All rights reserved.

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“…To determine the constants of the structural model, the inverse finite element iteration method according to the flowchart in figure 15 is applied to the CI-A multi-scale finite element model. Based on this method and by calibrating the results of the finite element model with the experimental results of the CI-A sample, the constants of the Ramberg-Osgood model are obtained according to table 7.…”

Section: Meltmentioning

confidence: 99%

“…In these cast irons, the formation of spherical graphites leads to the reduction of stress concentration and, as a result, the improvement of mechanical behavior. Of course, it should be noted that the morphology of graphites (geometrical shape, size, distribution, and degree of sphericity of graphites) has a great influence on the mechanical behavior of cast iron, which is influenced by the type and amount of alloying elements, cooling speed, and solidification process, as well as heat treatment [5][6][7]. Studies show that the physical and mechanical properties of ductile irons depend on their microstructure, especially the type, distribution, and dispersion of spherical graphites [8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Mechanical properties prediction of ductile iron with spherical graphite using multi-scale finite element model

Alizadeh,

Ajri,

Maleki

2023

Phys. Scr.

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In this paper, using the multi-scale finite element method, the effect of graphite particles on the mechanical behavior of ductile iron has been investigated under tensile loading. For this purpose, taking into account the spherical geometric shape of the graphite phase and considering a specific volume fraction, these spheres are randomly placed in the whole body and a two-component composite material is created. Next, by defining the mechanical properties of two separate phases including the matrix and graphites as well as the interfaces between these two phases, a micromechanical model is developed for these materials. The mechanical properties of the matrix are simulated using the Ramberg-Osgood elastic-plastic model. By simulation in ABAQUS software and using nonlinear dynamic analysis, the effects of volume percentages and adhesion of graphite particles with matrix on the direct tensile load-displacement behavior of ductile iron were investigated. The results of experimental tests were used to verify the results of the numerical model. The weight percentage of graphite particles has a significant effect on the tensile strength and elastic modulus of these cast irons. The results show that with the increase in the amount of graphite particles, the tensile strength of cast iron increases up to a certain value and then reverses. With 21% graphite particles, the maximum tensile strength of ductile iron is 601 MPa. Compared with a pure sample of cast iron, the tensile strength increases by approximately 13.4% for this weight percentage of graphite particles.

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Influence of quenching strategy on phase transformation and mechanical properties of low alloy steel

Cited by 14 publications

References 77 publications

Effect of Quenching and Tempering on Mechanical Properties and Impact Fracture Behavior of Low-Carbon Low-Alloy Steel

Effect of Quenching and Tempering on Mechanical Properties and Impact Fracture Behavior of Low-Carbon Low-Alloy Steel

Effects of Dual‐Phase Region Quenching Treatment on Microstructure and Mechanical Properties of 24CrNiMo Low‐Alloy Steel Prepared by Selective Laser Melting

Mechanical properties prediction of ductile iron with spherical graphite using multi-scale finite element model

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