TY - JOUR AU - Hatos, István AU - Hargitai, Hajnalka AU - Fekete, Gusztáv AU - Fekete, Imre TI - Effect of Energy Density on the Mechanical Properties of 1.2709 Maraging Steel Produced by Laser Powder Bed Fusion JF - MATERIALS J2 - MATERIALS VL - 17 PY - 2024 IS - 14 SN - 1996-1944 DO - 10.3390/ma17143432 UR - https://m2.mtmt.hu/api/publication/35131120 ID - 35131120 AB - The unusual combination of the fundamentally contradictory properties of high tensile strength and high fracture toughness found in maraging steel makes it well suited for safety-critical applications that require high strength-to-weight materials. In certain instances, additive manufacturing (AM) has produced materials that may be desirable for safety-critical applications where impact toughness is a key property, such as structural parts for the aerospace industry or armor plates for military applications. Understanding the influence of process parameters and defect structure on the properties of maraging steel parts produced via laser powder bed fusion (LPBF) is a fundamental step towards the broader use of AM technologies for more demanding applications. In this research, the impact energy of V-notched specimens made of 1.2709 maraging steel produced by LPBF was determined via Charpy impact testing. Specimens were produced using different processing parameter sets. By combining the process parameters with the porosity values of the parts, we demonstrate that an almost full prediction of the impact properties can be achieved, paving the way for significantly reducing the expenses of destructive testing. LA - English DB - MTMT ER - TY - JOUR AU - Kocsis, Bence AU - Hatos, István AU - Varga, Lajos Károly TI - 3D printed metal-insulator layered structure JF - JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS J2 - J MAGN MAGN MATER VL - 563 PY - 2022 PG - 4 SN - 0304-8853 DO - 10.1016/j.jmmm.2022.169994 UR - https://m2.mtmt.hu/api/publication/33113582 ID - 33113582 LA - English DB - MTMT ER - TY - JOUR AU - Török, Dániel AU - Zink, Béla AU - Ageyeva, Tatyana AU - Hatos, István AU - Zobač, M. AU - Fekete, Imre AU - Boros, Róbert AU - Hargitai, Hajnalka AU - Kovács, József Gábor TI - Laser powder bed fusion and casting for an advanced hybrid prototype mold JF - JOURNAL OF MANUFACTURING PROCESSES J2 - J MANUFACT PROCES VL - 81 PY - 2022 SP - 748 EP - 758 PG - 11 SN - 1526-6125 DO - 10.1016/j.jmapro.2022.07.034 UR - https://m2.mtmt.hu/api/publication/33039222 ID - 33039222 N1 - Department of Polymer Engineering, Faculty of Mechanical Engineering, Budapest University of Technology and Economics, Műegyetem rkp. 3., Budapest, H-1111, Hungary MTA-BME Lendület Lightweight Polymer Composites Research Group, Műegyetem rkp. 3., Budapest, H-1111, Hungary Department of Materials Science and Technology, Széchenyi István University, Egyetem Tér 1., Győr, H-9026, Hungary Institute of Scientific Instruments, The Czech Academy of Sciences, Královopolská 147., Brno, CZ-612 64, Czech Republic Export Date: 4 August 2022 Correspondence Address: Ageyeva, T.; Department of Polymer Engineering, Műegyetem rkp. 3., Hungary; email: ageyevat@pt.bme.hu AB - One of the factors limiting the throughput of injection molding is cooling time, which is the most significant part of the total cycle time. The cooling efficiency of molds can be considerably improved with additive manufacturing techniques. A 3D printed injection mold with conformal cooling channels reduces cooling time by 30–40 %. However, the cooling efficiency of these molds can be further improved with a multi-material approach and the use of materials with excellent thermal and mechanical properties. In this study, we propose a hybrid mold insert made of steel and copper, produced with the combination of Laser Powder Bed Fusion (L-PBF) and casting. The steel shell that contains conformal cooling channels was printed by L-PBF. Then this shell was cast with copper. We found that the hybrid mold insert we developed has lower residual cooling time and heat extraction is more uniform than the conventional printed steel insert. The developed hybrid mold insert enables a reduction of residual cooling time by 15 %. LA - English DB - MTMT ER - TY - CHAP AU - Fekete, Imre AU - Kocsis, Bence AU - Nagy, András Lajos AU - Hatos, István TI - Study on the effects of different manufacturing parameters on the properties of maraging steel by DMLS T2 - 12th IEEE International Conference on Cognitive Infocommunications (CogInfoCom 2021) PB - Institute of Electrical and Electronics Engineers (IEEE) CY - Online kiadás SN - 9781665424943 PY - 2021 SP - 729 EP - 733 PG - 5 UR - https://m2.mtmt.hu/api/publication/32787741 ID - 32787741 LA - English DB - MTMT ER - TY - CONF AU - Fekete, Imre AU - Ibriksz, Tamás AU - Hatos, István TI - Additív technológiával előállított erősítőanyagok szintaktikus fémhabokban való alkalmazhatóságának vizsgálata T2 - Additív technológiával előállított erősítőanyagok szintaktikus fémhabokban való alkalmazhatóságának vizsgálata PY - 2021 SP - 1 UR - https://m2.mtmt.hu/api/publication/31999144 ID - 31999144 LA - Hungarian DB - MTMT ER - TY - THES AU - Hatos, István TI - Additív szerszámgyártás technológiájának fejlesztése járműipari alkatrészek gyártásához PY - 2020 DO - 10.15477/SZE.MMTDI.2021.004 UR - https://m2.mtmt.hu/api/publication/33882478 ID - 33882478 LA - Hungarian DB - MTMT ER - TY - JOUR AU - Kocsis, Bence AU - Fekete, Imre AU - Hatos, István AU - Varga, Lajos Károly TI - Soft Magnetic Composites Prepared by 3D Laser Printing JF - ACTA PHYSICA POLONICA A J2 - ACTA PHYS POL A VL - 137 PY - 2020 IS - 5 SP - 886 EP - 888 PG - 3 SN - 0587-4246 DO - 10.12693/APhysPolA.137.886 UR - https://m2.mtmt.hu/api/publication/31455166 ID - 31455166 N1 - CODEN: ATPLB LA - English DB - MTMT ER - TY - CHAP AU - Hatos, István ED - Dernóczy, Adrienn TI - Wear measurement of DMLS and conventional tool steels parts T2 - Kutatási jelentés - Research Report, 2. kötet PB - Universitas-Győr Nonprofit Kft. CY - Győr T3 - Kutatási jelentés (Széchenyi István Egyetem, Győr), ISSN 2676-7937 ; 2. PY - 2020 SP - 238 EP - 242 PG - 5 UR - https://m2.mtmt.hu/api/publication/31411480 ID - 31411480 LA - English DB - MTMT ER - TY - JOUR AU - Hatos, István AU - Fekete, Imre AU - Harangozó, Dóra AU - Hargitai, Hajnalka TI - Influence of Local Porosity on the Mechanical Properties of Direct Metal Laser-Sintered 1.2709 Alloy JF - STROJNISKI VESTNIK-JOURNAL OF MECHANICAL ENGINEERING J2 - STROJ VESTN-J MECH E VL - 66 PY - 2020 IS - 6 SP - 351 EP - 357 PG - 7 SN - 0039-2480 DO - 10.5545/sv-jme.2020.6573 UR - https://m2.mtmt.hu/api/publication/31360504 ID - 31360504 LA - English DB - MTMT ER - TY - CHAP AU - Hatos, István ED - Dernóczy, Adrienn TI - Szerszámbetétek fém 3D nyomtatása T2 - Kutatási jelentés, 1. kötet PB - Universitas-Győr Nonprofit Kft. CY - Győr T3 - Kutatási jelentés (Széchenyi István Egyetem, Győr), ISSN 2676-7937 ; 1. PY - 2019 SP - 170 EP - 174 PG - 5 UR - https://m2.mtmt.hu/api/publication/30704608 ID - 30704608 LA - Hungarian DB - MTMT ER -