1. PhD. thesis: Research of weldability of stainless steel and copper by power beam welding methods
Supervisor: doc. Ing. Erika Hodúlová, PhD., erika.hodulova@stuba.sk
Anotation: The main aim will be the creation of suitable dissimilar welded joints (stainless steel and copper) using the progressive joining method – laser beam welding. These joints need to fulfill structural integrity and required mechanical properties. Several modern scientific methods will be used. During the solving, method of scientific analysis and planning of the experiments using the Response surface method (RSM) package will be used to determine the optimal parameters of the high-productive joining method-laser beam of the two types of joints (butt joint and lap joint). The simulation methods will be used to confirm the appropriate parameters prior to the actual welding process with the help of creating a mathematical model of the weld joint, while monitoring and evaluating the thermal and deformation fields results. Simulation programs ANSYS and SYSWELD will be used as a research tool. To achieve the stated objectives working procedures will be developed based on the knowledge and gathered information. Macrostructural and microstructural analysis of the joints will be used as experimental methods to evaluate the structural integrity of welded and brazed joints. SEM analysis and extended to high-resolution transmission electron microscopy will be used to determine the creation of different phases and changes in chemical composition as well as the identification of excluded phases in joints. For the determination of internal defects of welded joints, the computer tomography will be involved. The mechanical properties of the joints will be evaluated by tensile strength test in case of butt welds, by shear strength in case for lap joints, the microhardness will be measured and the fracture test will be performed while the fracture surface will be evaluated.
Characteristics of supervisor: Erika Hodúlová (female) is a scientific and research employee of SUT FMST since May 2003. She received her PhD. (2007) in Machining Technologies and Materials, in research of lead-free solder joints interface and she received her associated professor – doc. (2013) in research of application of lead-free solders in soldering process. During her practice at the Faculty she was actively involved in solution of several national and international scientific projects. She has been registered in many professional databases, while the most significant case seems to be her registration as the Delegate and Chair Person in IIW (International Institute of Welding) commission XVII „Brazing, soldering and diffusion welding“, sub-commission XVII-C „Soldering“ and expert in Commission IV- Power Beam Processes and Commission V – Non-destructive Testing and Quality Assurance of Welded Products. She is a co-author of several CC publications and reviewer for Journal of Alloys and Compounds and Welding in the World.
The most important publications of supervisor:
- HODÚLOVÁ, Erika - PALCUT, Marián - LECHOVIČ, Emil - ŠIMEKOVÁ, Beáta - ULRICH, Koloman. Kinetics of intermetallic phase formation at the interface of Sn-Ag-Cu-X (X = Bi, In) solders with Cu substrate. In Journal of Alloys and Compounds. Vol. 509, Iss. 25 (2011), s.7052-7059. ISSN 0925-8388 (2011: 2.289 - IF, 1.164 - SJR, Q1 - SJR Best Q). V databáze: WOS ; SCOPUS.
- HODÚLOVÁ, Erika - ŠIMEKOVÁ, Beáta - KOVAŘÍKOVÁ, Ingrid [Sukubová, Indrig]. Structural changes of the IMC in lead free solder joints. In Materials transactions. Vol. 56, No. 7 (2015), s. 1043-1046. ISSN 1345-9678 (2015: 0.689 - IF, Q3 - JCR Best Q, 0.491 - SJR, Q2 - SJR Best Q). V databáze: CC ; SCOPUS ; WOS ; DOI: DOI: 10.2320/matertrans.MI201408.
- KOVAČÓCY, Pavel - ŠIMEKOVÁ, Beáta - KOVAŘÍKOVÁ, Ingrid [Sukubová, Indrig] - HODÚLOVÁ, Erika - DOMÁNKOVÁ, Mária - PTAČINOVÁ, Jana - JURČI, Peter. Investigation of the microstructure and mechanical characteristics of disk laser-welded Ti-6Al-4V alloy joints. In Journal of Materials Engineering and Performance. Vol. 29, iss. 1 (2020), s. 593 - 606. ISSN 1059-9495 (2018: 1.476 - IF, Q3 - JCR Best Q, 0.541 - SJR, Q2 - SJR Best Q). V databáze: DOI: 10.1007/s11665-019-04539-5 ; WOS: 000505391200007 ; SCOPUS: 2-s2.0-85077633658.
- SOPOUŠEK, Jiří - PALCUT, Marián - HODÚLOVÁ, Erika - JANOVEC, Jozef. Thermal Analysis of the Sn-Ag-Cu-In Solder Alloy. In Journal of Electronic Materials. Vol. 39, Iss. 3 (2010), s.312-317. ISSN 0361-5235 (2010: 1.421 - IF, 0.773 - SJR, Q1 - SJR Best Q). V databáze: SCOPUS ; WOS.
- PALCUT, Marián - SOPOUŠEK, Jiří - TRNKOVÁ, Lýdia - HODÚLOVÁ, Erika - SZEWCZYKOVÁ, Beáta - OŽVOLD, Milan - TURŇA, Milan - JANOVEC, Jozef. Thermal analysis of selected tin-based lead-free solder alloys. In Kovové materiály. Metallic materials. Vol. 47, No.1 (2009), s.43-50. ISSN 0023-432X (2009: 0.468 - SJR, Q1 - SJR Best Q). V databáze: WOS ; SCOPUS.
More information https://is.stuba.sk/pracoviste/prehled_temat.pl?detail=81438;pracoviste=60
Institute: Institute of Production Technologies
Study program: Mechanical Engineering Technologies and Materials
2. PhD. thesis: CAx technology and technology solutions in the high-tech industry
Supervisor: prof. Dr. Ing. Jozef Peterka, jozef.peterka@stuba.sk
Anotation:
Characteristics of supervisor: 3D COMPLICATED MODELING AND 5-AXIS MACHINING, CAD/CAM/CAPP TECHNOLOGY, CUTTING TECHNOLOGY, ECOLOGY FRIENDLY MACHINING, HARD MACHINING, HIGH SPEED MACHINING, MODELING AND SIMULATION OF CUTTING PROCESSES, SURFACE ROUGHNESS, CUTTING TOOLS BALANCING. WOS ResearcherID: Y-7014-2019
The most important publications of supervisor:
- KURIC, I. -- KOŠTURIAK, J. -- MARCINČIN, J. -- JANÁČ, A. -- PETERKA, J. Počítačom podporované systémy v strojárstve (Computer-aided systems in mechanical engineering). Žilina : Žilinská univerzita, 2002. 351 s. ISBN 80-7100-948-2. Počítačom podporované systémy v strojárstve. zv. 1998. ISSN 1335-3926.
- Pokorny, Peter; Peterka, Jozef; Vaclav, Stefan The task of 5-axis milling. 2014 in Management and Production Engineering Review. DOI: 10.2478/MPER-2014-0001
- Kuruc, M.; Vopat, T.; Peterka, J. Surface Roughness of Poly-Crystalline Cubic Boron Nitride after Rotary Ultrasonic Machining. 2015 in Procedia Engineering. DOI: 10.1016/J.PROENG.2015.01.444
- Jakubowski, Julian; Peterka, Jozef Design for Manufacturing for in virtual environment using knowledge engineering. 2014 in Management and Production Engineering Review. DOI: 10.2478/MPER-2014-0001
- Peterka, J. A new approach to calculating the arithmetical mean deviation of a profile during copy milling. Stroj Vest - J of Mech Eng. 2004. 50, 12, 594-597 WOS 000226942800003
More information
Institute: Institute of Production Technologies
Study program: Mechanical Engineering Technologies and Materials
3. PhD. thesis: Laser beam surface treatment of powder metallurgy based Ti composites
Supervisor: prof. Ing. Peter Šugár, CSc., peter.sugar@stuba.sk
Anotation: The dissertation thesis deals with the laser beam surface treatment of titanium and titanium metal matrix composite prepared by vacuum low temperature extrusion. When heated under the working atmosphere, the reaction of titanium with oxygen or nitrogen molecules is assumed. The processes of formation of specific biocompatible surface layers of TiO, TiO2 and TiN and their combinations by applying pulse laser beam and suitable gas atmosphere will be studied. The influence of the input process parameters on the morphology, microstructure, chemistry and osseointegration properties of a new types of surface layers will be analysed with the aim to be applied in modern dental and ortopaedic implantology. During study of physical and metallurgical processes, scientific methods such as surface morphology and roughness evaluation, chemical microanalysis, X-ray phase analysis and electron microscopy will be utilized.
Characteristics of supervisor: Professor Peter Šugár is a university teacher at the Institute of Production Technologies, Faculty of Materials Science and Technology, Slovak University of Technology in Trnava. His research is focused on advanced machining processes with special interest in applying laser micromachining technologies in surface engineering. He has managed and performed variety of R&D&I national and European research projects focused on the experimental study of laser surface texturing and its application for improvement of tribological properties of sheet metal forming tools. Actually he works on the project which deals with the laser surface treatment of Ti – graphite composites prepared by low temperature methods of powder metallurgy dedicated for application in dental implantology, where he has close cooperation with Slovak Academy of Sciences in Bratislava and Laboratory of Interaction of Cells with Nanomaterials, Charles University in Prague.
The most important publications of supervisor:
- ŠUGÁR, Peter - MIKOLÁŠ, Juraj - ŠUGÁROVÁ, Jana. Experimental study of Nd: YAG laser machining of Cr-Ni austenitic stainless steel. In Tehnički Vjesnik - Technical Gazette. Vol. 20, No. 4 (2013), pp. 577-580. ISSN 1330-3651 (2013: 0.615 - IF, Q3 - JCR Best Q, 0.397 - SJR, Q2 - SJR Best Q).
- ŠUGÁR, Peter - ŠUGÁROVÁ, Jana - FRNČÍK, Martin. Laser surface texturing of tool steel: textured surfaces quality evaluation. In Open Engineering. Vol. 6, iss. 1 (2016), online, s. 90-97. ISSN 2391-5439 (2016: 0.204 - SJR, Q3 - SJR Best Q).
- ŠUGÁROVÁ, Jana - ŠUGÁR, Peter - FRNČÍK, Martin. Friction evaluation of laser textured tool steel surfaces. In Acta Mechanica et Automatica. Vol. 11, no. 2 (2017), s. 129-134. ISSN 2300-5319 (2017: 0.204 - SJR, Q3 - SJR Best Q).
- ŠUGÁR, Peter - ŠUGÁROVÁ, Jana - FRNČÍK, Martin - LUDROVCOVÁ, Barbora. Nanosecond Yb fibre laser milling of aluminium bronze: effect of process parameters on the surface finish. In Advances in Science and Technology Research Journal. Vol. 12, iss. 3 (2018), s. 10-15. ISSN 2299-8624.
- ŠUGÁR, Peter - KOVÁČIK, Jaroslav - ŠUGÁROVÁ, Jana - LUDROVCOVÁ, Barbora. A study of laser micromachining of PM processed Ti compact for dental implants applications. In Materials [elektronický zdroj]. Vol. 12, iss. 14 (2019), s. 1-15. ISSN 1996-1944 (2018: 2.972 - IF, Q2 - JCR Best Q, 0.686 - SJR, Q2 - SJR Best Q).
More information
Institute: Institute of Production Technologies
Study program: Mechanical Engineering Technologies and Materials