Effect of nanostructuring frictional treatment on the properties of high-carbon pearlitic steel. Part I: microstructure and surface properties

Savrai, R. A.; Makarov, A. V.; Malygina, I. Yu.; Волкова, Е. Г.

doi:10.1016/j.msea.2018.07.099

Cited by 24 publications

(10 citation statements)

References 46 publications

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“…Tailoring the hardness and corrosion resistance of dual-phase low-alloy high-carbon steel is gathering huge attention recently because of low-cost production of this grade of steel and its exceptional properties 1,2 . Utilisation of this high strength, hardness and wear resistance steels in engineering products reduces metal intensity, promoting cost-effectiveness due to its low energy consumption 3 , thus reducing the issues of serious environmental pollution and resource scarcity 4–7 .…”

Section: Introductionmentioning

confidence: 99%

Effect of selective-precipitations process on the corrosion resistance and hardness of dual-phase high-carbon steel

Handoko

Anurag

Pahlevani

et al. 2019

Sci Rep

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It is commonly known that precipitation of secondary phase in non-ferrous alloys will affect the mechanical properties of them. But due to the nature of dual-phase low-alloy high-carbon steel and its high potential of precipitation of cementite, there is limited study on tailoring the mechanical and corrosion properties of this grade of steel by controlling the precipitation of different phases. Predicting and controlling precipitation behaviour on this grade of steel is of great importance towards producing more advanced applications using this low-cost alloy. In this study the new concept of selective-precipitation process for controlling the mechanical and corrosion behaviour of dual-phase low-alloy high-carbon steel has been introduced. We have investigated the precipitation of different phases using in-situ observation ultra-high temperature confocal scanning laser microscopy, image analyser – ImageJ, scanning electron microscopy with energy dispersive spectroscopy (SEM/EDS) and electron probe microanalysis (EPMA). Volume fraction of each phase including retained austenite, martensite and precipitated phases was determined by X-ray diffraction (XRD), electrochemical corrosion test by Tafel extrapolation method and hardness performance by nanoindentation hardness measurement. The experimental results demonstrated that, by controlling the precipitations inside the matrix and at grain boundaries through heat treatment, we can increase the hardness of steel from 7.81 GPa to 11.4 GPa. Also, corrosion resistance of steel at different condition has been investigated. This new approach will open new possibility of using this low-cost steel for high performance applications.

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Section: Introductionmentioning

confidence: 99%

Effect of selective-precipitations process on the corrosion resistance and hardness of dual-phase high-carbon steel

Handoko

Anurag

Pahlevani

et al. 2019

Sci Rep

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“…Перспективным направлением в улучшении свойств различных материалов является поверхностное пластическое деформирование. Существует ряд методов для создания на поверхности металла упрочненного слоя с измельченной структурой в результате интенсивного механического воздействия: фрикционная [1,2] и дробеструйная обработки [3], ультразвуковая обработка шариками в вакууме [4] или инструментом, колеблющимся с ультразвуковой частотой [5,6], обработка трением с перемешиванием [7] и другие. Преимуществом таких обработок является возможность изменять свойства поверхности при сохранении структуры изделия в целом и создавать благоприятные сжимающие напряжения в упрочненном слое с плавным переходом к основе [8].…”

Section: Introductionunclassified

“…Transverse surface profile of 09Mn2Si steel after single pass of UIT (a) and UIFT at α = 50° (b). Влияние угла α при УЗУФО на параметр шероховатости поверхности R a стали 09Г2С: поперечный микрорельеф (1) и субмикрорельеф(2).…”

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“…Surface roughness R a of 09Mn2Si steel depending on UIFT angle α: transverse microrelief (1), submicrorelief(2).…”

mentioning

confidence: 99%

“…Деградация цементита перлитных колоний в низкоуглеродистой конструкционной стали активно развивается также под действием фрикционной обработки скользящим твердосплавным индентором [20]. При переходе углерода из цементита в твердый раствор он не только повышает прочность стали за счет твердорастворного упрочнения, но и эффективно закрепляет дислокации, тем самым упрочняя и стабилизируя структуру деформированного слоя [2,9]. Таким образом, важный вклад в наблюдаемое повышенное упрочнение феррито-перлитной стали 09Г2С при УЗУФО вносит более интенсивное диспергирование и растворение цементита в перлитных колониях, обусловленное усилением сдвиговой деформации в условиях нагружения наклонным ударом и без применения смазки, уменьшающей фрикционное воздействие деформирующего инструмента.…”

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The effect of ultrasonic impact-frictional treatment on the surface roughness and hardening of 09Mn2Si constructional steel

2019

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The paper compares the strengthening of constructional steel 09Mn2Si achieved by traditional ultrasonic impact treatment (UIT), and, the new method of ultrasonic impact-frictional treatment (UIFT), proposed by the authors. UIT is usually performed normally on the surface of the part with lubrication in the contact zone. The idea of UIFT is based on plastic shear deformation, activated by the friction effect of impulse impacts at a certain angle to the surface to be processed. In order to raise the friction coefficient, UIFT is performed without lubrication. It is shown that a decrease in the load application angle to the sample surface (α) increases the depth and hardness of the deformed surface layer of 09G2S structural steel. At the same time, the strengthening effect of treatment in the range of angles of 90 -70° mainly manifests itself in a thin (a few microns) near-surface layer, and the surface roughness remains almost unchanged. A further decrease in the angle increases the contribution of the friction component. Thus, UIFT at α = 50° gives the depth of the deformed layer 1.5 times, and the surface hardness is 2.5 times higher than after the traditional UIT. It was found that the profile of the pile-ups behind a moving instrument changed from symmetrical after UIT to shifted in the impact direction after UIFT, which led to a twofold increase in surface roughness for α = 50°. It was established that reduction of the UIFT scanning step from 0.2 mm to 0.1 mm (load of 149 N and processing speed of 600 mm/min), improved the surface roughness R a by a factor of 5 from 3.9 μm to 0.7 μm. A further decrease in the scanning step resulted in a surface coarsening due to fatigue degradation.

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Phase Prediction of High Carbon Pearlitic Steel: An Improved Model Combining Mind Evolutionary Algorithm and Neural Networks

et al. 2021

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Accurate phase constitution prediction is crucial for guiding the new steel design with desirable properties. This article uses three machine learning (ML) algorithms, backpropagation neural network (BPNN), radial basis function neural network (RBFNN), and fuzzy neural network (FNN), to compare the accuracy of predictive model. Toward the collected data, statistical measure of correlation is taken in the present work by determining Pearson correlation coefficient (PCC). The results show that the testing accuracy using BPNN is higher than the corresponding testing accuracy using RBFNN and FNN. With these understandings, the well‐known optimization algorithms, namely, mind evolutionary algorithm (MEA), are implemented to find optimal hyperparameters set that is able to induce a higher predictive capability. The resulting MEA‐BPNN further enhances the prediction results in the present dataset and efficiently explores the relationship between alloying elements and phase constitution. Finally, the reliability and practicability of the model are verified by experimental measurement on the ferrite content for prepared steels, and their mechanical properties are tested for engineering applications. As such, the work proposes a useful MEA‐BPNN model for predicting the phases of high carbon pearlite steel and provides an alternative route of designing new steels in a given system.

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Effect of nanostructuring frictional treatment on the properties of high-carbon pearlitic steel. Part I: microstructure and surface properties

Cited by 24 publications

References 46 publications

Effect of selective-precipitations process on the corrosion resistance and hardness of dual-phase high-carbon steel

Effect of selective-precipitations process on the corrosion resistance and hardness of dual-phase high-carbon steel

The effect of ultrasonic impact-frictional treatment on the surface roughness and hardening of 09Mn2Si constructional steel

Phase Prediction of High Carbon Pearlitic Steel: An Improved Model Combining Mind Evolutionary Algorithm and Neural Networks

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