Hardening and softening mechanisms of pearlitic steel wire under torsion

Zhao, Tian-Zhang; Zhang, Shihong; Zhang, Guangliang; Song, Hong-Wu; Cheng, Mengchun

doi:10.1016/j.matdes.2014.03.029

Cited by 40 publications

(18 citation statements)

References 35 publications

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“…Thus, a relatively low amount of structural defects would render wires better torsion properties [23,34,35]. As demonstrated in this work, the torsion properties of wires with inherited texture are better than that of wires without inherited texture.…”

Section: Mechanical and Thermal Propertiesmentioning

confidence: 58%

Microstructure and mechanical properties of cold-drawn pearlitic wires affect by inherited texture

Fang

Zhou

et al. 2015

Materials & Design

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Section: Mechanical and Thermal Propertiesmentioning

confidence: 58%

Microstructure and mechanical properties of cold-drawn pearlitic wires affect by inherited texture

Fang

Zhou

et al. 2015

Materials & Design

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“…Thus, the modified JC constitutive equation can be express as follow: . The reason for the excessive errors is that the SiCp/7055Al composites not only has the strain rate hardening effect but also the softening effect, which is not taken into account in equation (18) [16,23,[35][36][37]. For some materials, the combined effect of thermal softening and strain hardening on the flow stress should be considered during dynamic deformation [22,23,38].…”

Section: Modified Johnson-cook Modelmentioning

confidence: 99%

A modified Johnson-Cook model for dynamic behavior of spray-deposition 17 vol.% SiCp/7055Al composites at high strain rates

Tang

Wang

Jin

et al. 2020

Mater. Res. Express

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In this study, the dynamic impact tests of spray-deposited 17 vol% SiCp/7055Al composites at various strain rates were performed with a Split Hopkinson Pressure Bar (SHPB). In these tests, the strain rate was 392 s −1 -2002 s −1 , and the temperature was 293 K-623 K. Subsequently, the Johnson-Cook (JC) was used to describe the flow behaviors under high speed impact deformation, and its effectiveness was assessed. Results show that the stress values predicted by the JC model could be inconsistent with the experimental ones. A modified JC constitutive model of 17 vol% SiCp/7055Al composites was developed by modifying the strain rate hardening term and considering coupling effects of strain, temperature and strain rate. According to the comparison between the experimental data and the results assessed with the modified JC model, the proposed model could assess the stress-strain values more accurately, especially in the beginning of plastic deformation. This indicates that the composites exert the joint effects of strain rate hardening and temperature softening during high-speed impact deformation.

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“…Изучается влияние деформации кручения на упрочнение изделий из чистых металлов [1,2], аустенитных сталей c инициированием мартенситного превращения [3], а также из перлитных сталей [4,5]. Отмечается разупрочнение [4] при циклическом кручении. Во всех перечисленных работах не рассматривается ТО, свойственная процессу патентирования, и не уделяется должного внимания остаточным напряжениям (ОН).…”

Section: Abstract: Hardening By Torsion Ansys Workbench Residual Stunclassified

“…В частности, при кручении упрочнение заготовок или готовых изделий типа торсионов происходит как по дислокационному механизму, так и вследствие возникновения ОН. Интенсивная деформация приводит к существенным структурно-фазовым изменениям [1,2,4,5,[10][11][12][13][14]. Немаловажную роль играет и ТО, аналогичная обработке, применяемой при патентировании.…”

Section: Abstract: Hardening By Torsion Ansys Workbench Residual Stunclassified

Hardening by Torsion and Process Modelling

Karatushin¹,

Храмова²,

Плешанова³

2019

PoHEI.MB

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Проведены моделирование в среде ANSYS Workbench и экспериментальное исследование процесса упрочнения деформацией кручения в сочетании с термической обработкой заготовки круглого сечения. Упрочнение кручением создает на поверхности заготовки сжимающие напряжения и одновременно приводит к деформационному упрочнению по дислокационному механизму. Сформировавшееся напряженнодеформированное состояние является благоприятным для витков цилиндрической пружины, так как снижает на их поверхности напряжения от внешней нагрузки. В отличие от процесса упрочнения патентированием деформация кручением не приводит к уменьшению диаметра заготовки, и упрочнение по сечению распределяется в соответствии со значением крутящего момента. Рассмотренный механизм упрочнения может быть применен для торсионов, заменив собой дробеметный наклеп и обкатку роликом. Ключевые слова: упрочнение кручением, ANSYS Workbench, остаточные напряжения, патентированиеThis work describes an experimental study and simulation of the process of hardening by torsion in combination with heat treatment for workpieces with round cross section using in ANSYS Workbench. Hardening by torsion creates compressive stresses on the workpiece surface and simultaneously leads to strain hardening by the dislocation mechanism. The formed stress-strain state is favorable for coils of cylindrical springs as it reduces the stress on the surface of the coils from an external load. In contrast to the process of hardening by patenting, torsional deformation does not reduce the diameter of the workpiece and hardening over the cross section is distributed in accordance with the amount of torque. The hardening mechanism examined in this work can be applied to torsion rods, thus replacing shot peening and roller burnishing.

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Hardening and softening mechanisms of pearlitic steel wire under torsion

Cited by 40 publications

References 35 publications

Microstructure and mechanical properties of cold-drawn pearlitic wires affect by inherited texture

Microstructure and mechanical properties of cold-drawn pearlitic wires affect by inherited texture

A modified Johnson-Cook model for dynamic behavior of spray-deposition 17 vol.% SiCp/7055Al composites at high strain rates

Hardening by Torsion and Process Modelling

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