Grzegorz Królczyk

Opole University of Technology

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Munish Kumar Gupta

Opole University of Technology

Radosław W. Maruda

University of Zielona Góra

Stanisław Legutko

Poznań University of Technology

Zhixiong Li

Opole University of Technology

Piotr Niesłony

Opole University of Technology

Szymon Wojciechowski

Poznań University of Technology

Jolanta Królczyk

Opole University of Technology

Mehmet Erdi Korkmaz

Karabük University

Navneet Khanna

Institute of Infrastructure Technology Research and Management

Chander Prakash

Chandigarh University

Cooperative Institutions

Opole University of Technology

China University of Mining and Technology

Poznań University of Technology

Indian Institute of Technology Dhanbad

Chinese Academy of Sciences

Lovely Professional University

University of Chinese Academy of Sciences

Xi'an Jiaotong University

Chandigarh University

Technical University of Košice

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Effect of EP/AW additive under MQCL cooling conditions on the surface morphology of 316L stainless steel

Mechanik (2016)

Grzegorz Królczyk Radosław W. Maruda Mariusz Michalski A Staszewski

Wpływ dodatku EP/AW w warunkach chłodzenia metodą

Morphology

10.17814/mechanik.2016.8-9.310

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Citations (0)

Influence of Cutting Parameters on Surface Morphology of Austenitic Stainless Steel after Turning

Applied Mechanics and Materials (2014)

Grzegorz Królczyk Stanisław Legutko Radosław W. Maruda

The study presents the contribution in engineering of surfaces particularly in surface morphology of Austenitic Stainless Steels. The objective of the investigation was to determine the surface morphology of austenitic stainless steel after turning with coated carbide tool point. The investigation included geometrical parameters of SI for different cutting parameters in dry turning process of austenitic stainless steel. The study has been performed within a production facility during the production of electric motor parts and deep-well pumps.

Austenitic stainless steel

Turning point

Morphology

10.4028/www.scientific.net/amm.657.23

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Citations (0)

Neutrosophic entropy-based ingenious measurement for fast fourier transforms based classification of process-parameters and wear resistance of friction-stir processed hybrid AA7075- B4C aluminium metal-matrix composites

Journal of Materials Research and Technology (2022)

Rajeev Kumar Jujhar Singh Shubham Sharma Changhe Li Grzegorz Królczyk

Friction Stir Processing

Tribometer

10.1016/j.jmrt.2022.07.026

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Citations (27)

Parametric and nonparametric description of the surface topography in the dry and MQCL cutting conditions

Measurement (2018)

Grzegorz Królczyk Radosław W. Maruda Jolanta Królczyk Piotr Niesłony Szymon Wojciechowski

Parametric surface

10.1016/j.measurement.2018.02.052

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Citations (154)

A Novel Method of Laser Coating Process on Worn-Out Cutter Rings of Tunnel Boring Machine for Eco-Friendly Reuse

Symmetry (2020)

Anil K. Agrawal Somnath Chattopadhyaya V. M. S. R. Murthy Stanisław Legutko Grzegorz Królczyk

Cutter rings form an integral part of tunnel boring machines (TBM). These cutters are deployed in various hard rock tunneling projects. The life of the cutter rings governs the economics of tunneling significantly. This paper presents a novel methodology to enhance hardness and wear resistance of used worn out disc cutters in TBM for eco-friendly reuse. Disc cutters are mainly made of H13 tool steel. To improve the hardness and wear resistance, a layer of tungsten carbide is coated on the used cutter rings. Considering the long operating hours of TBM, cutter rings get worn out due to severe interaction with the hard rock both in compression and rolling mode. Replacement of the cutter-ring is costly, and quite a time consuming and cumbersome job. Refurbishment is always a better option and laser cladding is a novel technique for enhanced life of cutters. It increases the hardness and wear resistance of the cutters to a considerable extent. Cladding is carried out with the help of a laser beam. In this method, a layer of nanoparticles of tungsten carbide powder is deposited on the worn-out surface of the cutters. For carrying out the investigation, different coating parameters are selected based on the central composite design (CCD). With different capacities of laser, a total of 13 samples were prepared at various scanning speeds varying between 200 to 300 mm/min and a level of laser power varying between 100 to 200 W. The coating is critically inspected by various means such as an optical microscope, FESEM, and EDS. Hardness testing was accomplished by Vicker’s hardness testing machine. Wear testing was carried out with the aid of pin on disc setup. The results shows an asymmetrical behavior between the yield parameters (hardness and wear rate) and process parameters (scanning speed and laser power). The hardness values increased from 16% to 95%. A correlation test was conducted between the hardness and wear rate. The results depict a clear negative correlation between them, indicating the advantage of laser coating for reducing cutter ring wear in TBM.

Tungsten Carbide

Cladding (metalworking)

10.3390/sym12030471

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Citations (19)

Retraction notice to “Sustainability analysis of a hybrid renewable power system with battery storage for islands application” [J. Energy Storage 50 (2022) 104682]

Journal of Energy Storage (2024)

Xinrui Qi Jianmei Wang Grzegorz Królczyk Paolo Gardoni Zhixiong Li

Battery storage

10.1016/j.est.2024.111953

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Citations (0)

Investigation of machining characteristics of hard-to-machine Ti-6Al-4V-ELI alloy for biomedical applications

Journal of Materials Research and Technology (2019)

Swastik Pradhan Sunpreet Singh Chander Prakash Grzegorz Królczyk Alokesh Pramanik

Dry machining of Ti-6Al-4V alloy was investigated using SNMA120408 grade inserts. The material studied is designed for orthopedic applications. The effects of main cutting speed (VC), at constant feed rate (F) and depth of cut (DC) on machining characteristics (Feed force (Ff), radial force (Rf), Tangential Force (Tf)) and surface integrity (i.e., tool-chip contact length, chip segmentation, surface roughness, and tool wear) were examined. Experimental data indicate the cutting speed as the major parameter with direct impact on the machining characteristics. Increasing of the cutting speed promotes higher tangential forces that allow a decrease of the chip contact length; a smaller contact length results in a lower surface roughness and flank wear rate, respectively. To gain further insight from the simulated turning process an advanced Finite Element (FE) model was developed. The numerical model was built on the DEFORM-3D commercial software by incorporating the experimental cutting parameters. The numerical simulations results agree very well with experimental outputs in terms of cutting forces (FCS), tool-chip (T-C) contact length. Therefore, it was possible to estimate with accuracy the effective stress (σE) and the cutting temperature (TC). Further, due to its high robustness, the numerical model developed can be implemented in solving the industrial challenge (i.e., biomedical field) for predicting formations of serrated chip segment, chip thickness, potential types of chips, types of fracture mechanism and tool wear mechanism/rate generated during machining process.

Chip formation

Flank

Titanium alloy

10.1016/j.jmrt.2019.08.033

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Citations (91)

Microhardness and Surface Integrity in Turning Process of Duplex Stainless Steel (DSS) for Different Cutting Conditions

Journal of Materials Engineering and Performance (2013)

Grzegorz Królczyk Piotr Niesłony Stanisław Legutko

The objective of the investigation was to identify microhardness of surface integrity (SI) after turning with wedges of coated sintered carbide. SI is important in determining corrosion resistance, and also in fatigue crack initiation. The investigation included microhardness analyses in dry and wet machining of duplex stainless steel. The microhardness of SI for various cutting speeds was compared. It has been shown that wet cutting leads to the decrease of SI hardening depth, while increasing the rounded cutting edge radius of the wedge increases the maximum microhardness values and the hardening depth. An infinite focus measurement machine has been used for the rounded cutting edge radius analysis. The study has been performed within a production facility during the production of electric motor parts and deep-well pumps as well as explosively cladded sheets.

Surface Integrity

Hardening (computing)

10.1007/s11665-013-0832-4

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Citations (85)

Analysis of the Deviation in a Low-Cost System for Stepless Digital Control of Conventional Lathe Spindle Speeds

Applied Sciences (2018)

Tadeusz Mikołajczyk Tomasz Paczkowski Danil Yurievich Pimenov Mozammel Mia Karali Patra

A conventional manual lathe electric motor drives the multi-stage gearbox transmitting torque to the spindle so that the workpiece makes contact with the machine tool at a given speed. The cutting speed is proportional to both the diameter of the workpiece and the spindle speed, however, the increments in spindle speed are limited. Manual lathe machines cannot be regulated at the optimum cutting speeds for all diameters. An innovative modernization of the main driveline of a TSB16 manual lathe is proposed in this paper, allowing for a cost-effective system for digital control of spindle speeds using an inverter. The inverter is controlled using an 8-bit AO (analog output) converter with special software developed with Visual Basic. The results of the analysis and various test runs with this new system for automated control of spindle rotation, showed that the required cutting speed can be achieved for any workpiece diameter. The deviation of cutting-speed of the upgraded system for any turning diameter is greatly reduced in comparison with the deviation of cutting-speed of a manual lathe. Finally, tests on this versatile system demonstrated a cost-effective method for modernizing the drive system of conventional lathe machines.

Machine tool

Gear ratio

10.3390/app9010012

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Citations (3)

Influence of Technological Cutting Parameters on Surface Texture of Austenitic Stainless Steel

Applied Mechanics and Materials (2014)

Grzegorz Królczyk Stanisław Legutko Radosław W. Maruda

The paper presents the contribution in engineering of surfaces particularly in surface texture of Austenitic Stainless Steels. The objective of the investigation was to determine the surface texture of austenitic stainless steel after turning with coated carbide tool point. The investigation included geometrical parameters of Surface Integrity for different technological cutting parameters in dry turning process of austenitic stainless steel. The article presents the surface roughness parameters with the roughness profiles (irregular slopes). The percentage of isotropic surfaces and Bearing Area of Primary Model. Analyses were performed for variable cutting parameters. An Infinite Focus Measurement Machine (IFM) was used for the surface texture analysis. The study was performed within a production facility during the machining of electric motor parts and deep-well pumps.

Austenitic stainless steel

Texture (cosmology)

10.4028/www.scientific.net/amm.693.430

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Citations (8)