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Current issue
Manufacturing Technology Journal, 2026 (vol. 26), issue 3
Gradient Stiffness Modelling of Thin Adhesive Bonds
Kamil Anasiewicz
Manufacturing Technology 2026, 26(3):258-270 
The objective of this study was to evaluate the influence of through-thickness variability of Young’s modulus on the numerical modelling of adhesive joint behaviour. The study combined experimental characterization with finite element simulations. Nanoindentation measurements were used to deter-mine the distribution of Young’s modulus across adhesive layers with thicknesses of 0.05 mm and 0.1 mm. Based on these measurements, two-dimensional finite element models of double-overlap joints were developed in Abaqus. Two modelling approaches were analysed: a conventional homogeneous model with constant material properties and a heterogeneous...
Degradation Behaviour of P235GH, P265GH and P355GH Steels in High-Temperature Boiler Applications
Alena Breznická, Michal Krbaťa, Marcel Kohutiar, Pavol Mikuš, Ľudmila Timárová, Jozef Jaroslav Fekiač, Lucia Kakošová, Alex Jeluš
Manufacturing Technology 2026, 26(3):271-279
The study focuses on the evaluation of the degradation behaviour of structural materials used in a heat exchanger boiler exposed to elevated thermal, pressure, and cyclic loading conditions. The research is aimed at non alloy pressure steels P235GH, P265GH, and P355GH employed in critical boiler components. The objective of the study was to analyse the effect of temperature in the range of 250–600 °C on the residual mechanical properties, plastic deformation, and fatigue behaviour of these materials. The results indicate that at temperatures above 300–400 °C, a significant degradation of mechanical properties occurs. The residual...
Impact of Infill Patterns and Densities on the Mechanical Strength of FDM 3D-Printed Components
Marija Dimovska, Nenad Radenkovikj, Ognen Tuteski, Ema Vasileska, Boban Kusigerski, Mite Tomov, Valentina Gechevska
Manufacturing Technology 2026, 26(3):280-295
Additive manufacturing (AM), more commonly known as 3D printing, is a highly convenient manufacturing process that enables the creation of complex 3D objects. The large body of literature proved that the choice of material, the printing technology used, and the values of certain process parameters all influence the mechanical behavior of the final part. In this study, the Fused Deposition Modeling (FDM) technology was used to manufacture standardized test specimens, which were all subjected to mechanical testing. The main aim of the research was to investigate the effects of various infill pat-terns, combined with various infill densities, on tensile...
3D Printing – Weight Optimization of FDM-Printed Components Using PLA and PETG
Alexandr Fales, Vít Černohlávek, Marcin Suszynski, Jan Štěrba, Patrik Balcar, Marek Makúch, Pavel Houška
Manufacturing Technology 2026, 26(3):296-306
Within the framework of my doctoral thesis, the selection of suitable FDM 3D printing parameters for the fabrication of parts for modular educational robotics kits is systematically analysed. The research encompasses both the choice of an appropriate 3D printer and the design and implementation of a series of experimental measurements and mechanical tests aimed at obtaining a sufficiently robust data set for determining the optimal combination of filament materials and printing parameters. These parameters are intended to ensure that the printed parts achieve the required dimensional, weight, and mechanical characteristics while minimizing the need...
Study on Removal Mechanism and Surface Topography in Ultrasonic-Assisted Grinding of High Volume Fraction SiCp/Al Composite
Weicheng Guo, Hailong Zhang, Miaoxian Guo
Manufacturing Technology 2026, 26(3):307-318
High volume fraction SiCp/Al composites are highly valued in aerospace, automotive, and electronic packaging for their exceptional mechanical and thermal properties. To enhance the machinability of these difficult-to-cut materials, this study systematically evaluates ultrasonic vibration-assisted grinding (UAG) against conventional grinding (CG). Experimental comparisons reveal that UAG lowers grinding forces by up to 26%, a benefit primarily driven by the reduction in undeformed chip thickness (UCT). This kinematic modification optimizes the particle removal mode, thereby mitigating severe particle fracture and interfacial debonding. Crucially, the...
Applications of the Boriding process in the Defence industry
Martin Jaššo, Richard Pastirčák, Peter Fabian, Jozef Bronček
Manufacturing Technology 2026, 26(3):319-333
The study analyses current trends in the manufacturing of highly stressed components used in the defence industry, with a particular focus on handgun components. These parts are commonly produced from low-alloy steels that are refined to achieve medium strength levels. To enhance their resistance to mechanical and thermal loading, conventional production routes typically involve surface hardening followed by tempering. This study investigates the potential of replacing these established methods with a chemical–thermal surface treatment, specifically boriding, in which the surface layer is enriched with boron atoms. The mechanical properties of...
Effect of Solution Heat Treatment Parameters on the Mechanical Properties of Re-aged EN AW-7022 Alloy
Mariana Kuffová, Michal Krbata, Marcel Kohutiar, Pavol Mikuš, Alena Breznická
Manufacturing Technology 2026, 26(3):334-345
The presented article deals with the influence of different solution annealing temperatures and times on the mechanical properties and microstructural changes of the EN AW-7022 aluminum alloy after two-stage re-aging. After the initial soft annealing, the samples were subjected to solution annealing at temperatures of 475 °C/20min, 500 °C/20min, 525 °C/30min and 575 °C/30min, followed by two-stage artificial aging at 120 °C/4h and 175 °C/6h. The mechanical properties were evaluated by static tensile testing and Vickers hardness measurements. The highest strength characteristics were recorded at 525 °C/30min. Metallographic and EDS analysis confirmed...
Comparative Surface Roughness Performance of Al7075, Al6061, and Al5052 in End Milling Using Taguchi L16 S/N and Anova
Richard A M Napitupulu, Siwan Edi Amanta Perangin-angin
Manufacturing Technology 2026, 26(3):346-355
This study examines the effects of cutting parameters on surface roughness (Ra) for three aluminum alloys AL7075, AL6061, and AL5052 using a Taguchi L16 (4³) design, smaller-is-better signal-to-noise (S/N) analysis, and ANOVA. Experiments were conducted on a 3-axis CNC milling machine with a 2-flute Ø6 mm carbide end mill. Overall, AL7075 produced the smoothest surface (minimum Ra = 0.143 μm), followed by AL6061 and AL5052. The observed trends are consistent with machining mechanics: increasing cutting speed suppresses built-up edge (BUE) and vibration, whereas larger feed and depth of cut (doc) increase chip load and tool deflection....
Marker-Based Photogrammetric Modelling of the Lower Leg Using Agisoft Metashape for 3D-Printed Splints
Minh-Ky Nguyen, Natasa Naprstkova, Tuong Nguyen Van
Manufacturing Technology 2026, 26(3):356-363
Designing patient-specific 3D-printed splints requires accurate limb geometry acquisition. Professional 3D scanners are commonly used for acquiring the 3D geometry of limbs but they are high cost and less accessible in routine clinical practice. Photogrammetry, which reconstructs 3D models from 2D images captured by digital or smartphone cameras, provides a low-cost and flexible alternative. This study proposes a practical workflow for lower leg modelling using Agisoft Metashape and AutoCAD, employing two printed markers as scaling references. The two markers with a precisely defined inter-marker distance of 150 mm were printed on an A4 sheet and used...
Analysis of Atmospheric Plasma Spray Surface Composite Multilayer for Tire Mold Applications
Jan Novotný, Filip Mamoń, Štefan Michna, Tomáš Vlach
Manufacturing Technology 2026, 26(3):364-371
Usti nad Labem. Czech Republic. E-mail: jan.novotny@ujep.cz This work investigates atmospheric plasma spraying (APS) coatings on aluminum molds used for truck tire vulcanization. Cobalt-based powders (MS1) and a NiAl interlayer combined with cobalt powders (MS1 + MS2) were deposited on AlMg3Mn alloy substrates. SEM/EDS analyses revealed that the NiAl interlayer improved adhesion, reduced chromium agglomeration, and enhanced ele-mental homogeneity. Vickers microhardness testing showed higher hardness values for MS1 + MS2 (457 HV 0,3) compared to MS1 (436 HV 0,3). Despite some residual cracks and porosity, their impact on per-formance was minimal. The...
Research on Flow and Erosion Characteristics of Supercritical Regulating Valve
Yongqiang Pan, Qiong Liu, Yue Tang
Manufacturing Technology 2026, 26(3):372-379
The regulating valve is a key component of the hydraulic control system. The flow characteristics of the regulating valve are an important parameter for the structural design of the regulating valve. The flow coefficient of the regulating valve directly reflects its flow characteristics, so it is significant to calculate the flow coefficient of the regulating valve accurately. Generally, the flow coefficient is determined by the empirical formula method or experimental method, and the accuracy and efficiency of the calculation are relatively low. In this study, a method for calculating the flow coefficient of the regulating valve com-bined with numerical...
Mathematical Analysis of Predictive Maintenance Strategies for Enhanced Manufacturing Efficiency
Varsha Haridas Sadrani, Lowlesh Nandkishor Yadav, Jan Blata, Shradhesh Rajuji Marve, Ankita Rekkaward, B Swarna, Robert Cep
Manufacturing Technology 2026, 26(3):380-394
In manufacturing, the demand is always for better proficiency, less operational costs, and greater effectiveness. The key in achieving these requirements through adept handling is, in fact, maintenance of machines and devices. Combinations of regular maintenance schemes, preventive and curative methods, usually tend to swing between unnecessary maintenance jobs and unexpected equipment failures. This situation calls for a need to develop a more sophisticated approach, which gives rise to Predictive Maintenance (PdM). PdM is different from the rest because it forecasts changes that lead to failure in the equipment even before they seem probable, preparing...