Experimental and Molecular Dynamic Study of Grain Refinement and Dislocation Substructure Evolution in HSLA and IF Steels after Severe Plastic Deformation

Muszka, Krzysztof; Zych, Dawid; Lisiecka-Graca, Paulina; Madej, Łukasz; Majta, Janusz

doi:10.3390/met10091122

Cited by 11 publications

(4 citation statements)

References 17 publications

(19 reference statements)

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“…The second approach, called the “top-down” process, is based on grinding the grains using severe plastic deformation (SPD). The SPD processes create ultra-thin cloths by applying extreme stretching at high hydrostatic pressures and low homologous temperatures [ 33 , 34 , 35 , 36 , 37 ]. The achievable minimum grain sizes depend on the material properties, but as a rule, grain sizes up to the nanocrystalline state are not achieved.…”

Section: Introductionmentioning

confidence: 99%

Development of a Thermomechanical Treatment Mode for Stainless-Steel Rings

et al. 2022

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This article describes a technology for the thermomechanical treatment of stainless-steel piston rings. This technology makes it possible to obtain rings with an optimal combination of plastic and strength properties that is essential for piston rings. The following thermomechanical treatment is suggested for piston rings manufacturing: quenching at 1050 °C, holding for 30 min and cooling in water, then straining by the HPT method for eight cycles at cryogenic temperature and annealing at a temperature up to 600 °C. The resulting microstructure consisted of fine austenite grains sized 0.3 μm and evenly distributed carbide particles. Annealing above this temperature led to the formation of ferrite in the structure; however, preserving the maximum fraction of austenitic component is very important, since the reduction of austenite in the structure will cause a deterioration of corrosion resistance. The strength properties of steel after such treatment increased by almost two times compared with the initial ones: microhardness increased from 980 MPa to 2425 MPa, relative elongation increased by 20%. The proposed technology will improve the strength and performance characteristics of piston rings, as well as increase their service life, which will lead to significant savings in the cost of repair, replacement and downtime.

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Section: Introductionmentioning

confidence: 99%

Development of a Thermomechanical Treatment Mode for Stainless-Steel Rings

et al. 2022

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“…Most importantly, utilizing more expensive steel causes the entire production process less economically efficient. The creation of ultrafine-grained wire in such wires employing pressure metal treatment (PMT) technologies is one of the most promising areas in improving steel-copper wire's plasticity and tensile properties [47][48][49][50][51][52] as a result of heating a steel-copper. It is difficult to use a wire made of two metals with distinct physical and mechanical properties in the future because diffusion processes can generate brittle intermetallic inclusions at the steel-copper bond's border.…”

Section: Introductionmentioning

confidence: 99%

Study of the Heat Equation and the Effect of Temperature Inside an Electric Cable Consisting of Aluminum and Copper Metals

Maturi¹

2023

GEOMATE

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In this paper, we study the mathematical physics model; partial discharge (PD) mapping and power cable fault location are approaches based on the principle of time domain reflection (TDR) measurement, influenced by the power cable's height Frequency wave propagation properties. Furthermore, power cables. They're increasingly being used to transmit electrical energy and communication signals simultaneously. Smart grids are an example of such technology. Power cables are exposed to a variety of temperatures when in use. Changes in the load current flowing through the cable cause differences. As a result, it is essential to Recognize how temperature affects the high-frequency characteristics of power wires. Temperature changes advance Errors in TDR measurements, according to simulations, and result in numerical solutions undertaken in this study. It's also shown that when the cable's temperature rises from25°C to 60°C, the attenuation increases by 1° and the propagation velocity rises by 1°.a 4-percentage-point average The phase constant, on the other hand, drops by order of magnitude on average. The findings imply that temperature effects must be considered while making decisions. Communication channels in power cables are designed.

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“…One of the most promising areas in terms of increasing the plasticity and strength properties of steel-copper wire is the obtainment of ultrafine-grained wire in such wires by using pressure metal treatment (PMT) methods [ 25 , 26 , 27 , 28 , 29 , 30 ]. Since heating a steel–copper wire composed of two metals with different physical and mechanical properties can lead to diffusion processes, this can result in the formation of brittle intermetallic inclusions at the boundary of the steel–copper bond, which hinders the subsequent use of such a wire.…”

Section: Introductionmentioning

confidence: 99%

Hardening of Bimetallic Wires from Secondary Materials Used in the Construction of Power Lines

et al. 2022

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Copper-sheathed steel wires combine the conductivity of copper and the traction resistance of steel, which makes a bimetallic wire an ideal material for the construction of power lines. Currently, there is a small number of studies devoted to the change in the microstructure of steel-copper wire during its strain. Since steel and copper have different mechanical properties, these metals at the interface can be deformed in different ways. Therefore, the present research is devoted to the study of ECAP-drawing process impacts on the properties of bimetallic steel-copper wire. During the conducted studies, the possibility and efficiency of using the combined strain technology for the formation of ultrafine grained structure and increased strength properties of steel-copper wire have been proved.

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Experimental and Molecular Dynamic Study of Grain Refinement and Dislocation Substructure Evolution in HSLA and IF Steels after Severe Plastic Deformation

Cited by 11 publications

References 17 publications

Development of a Thermomechanical Treatment Mode for Stainless-Steel Rings

Development of a Thermomechanical Treatment Mode for Stainless-Steel Rings

Study of the Heat Equation and the Effect of Temperature Inside an Electric Cable Consisting of Aluminum and Copper Metals

Hardening of Bimetallic Wires from Secondary Materials Used in the Construction of Power Lines

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