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Microstructure and Mechanical Properties of Laser Additive Manufactured H13 Tool Steel
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SYSNO ASEP 0556593 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Microstructure and Mechanical Properties of Laser Additive Manufactured H13 Tool Steel Author(s) Trojan, K. (CZ)
Ocelik, V. (NL)
Čapek, J. (CZ)
Čech, J. (CZ)
Canelo-Yubero, David (UJF-V) ORCID, SAI
Ganev, N. (CZ)
Kolařík, K. (CZ)
de Hosson, J. T. M. (NL)Number of authors 8 Article number 243 Source Title Metals. - : MDPI
Roč. 12, č. 2 (2022)Number of pages 21 s. Publication form Online - E Language eng - English Country CH - Switzerland Keywords laser additive manufacturing ; laser cladding ; AISI H13 tool steel ; microstructure ; residual stresses ; electron diffraction ; X-ray diffraction ; neutron diffraction ; in-situ tensile testing OECD category Materials engineering Research Infrastructure CANAM II - 90056 - Ústav jaderné fyziky AV ČR, v. v. i.
Reactors LVR-15 and LR-0 II - 90120 - Centrum výzkumu Řež s.r.o.Method of publishing Open access Institutional support UJF-V - RVO:61389005 UT WOS 000775925500001 EID SCOPUS 85123440482 DOI 10.3390/met12020243 Annotation Hot working tool steel (AISI H13) is one of the most common die materials used in casting industries. A die suffers from damage due to friction and wear during its lifetime. Therefore, various methods have been developed for its repair to save costs to manufacture a new one. A great benefit of laser additive manufacturing (cladding) is the 3D high production rate with minimal influence of thermal stresses in comparison with conventional arc methods. Residual stresses are important factors that influence the performance of the product, especially fatigue life. Therefore, the aim of this contribution is to correlate the wide range of results for multilayer cladding of H13 tool steel. X-ray and neutron diffraction experiments were performed to fully describe the residual stresses generated during cladding. Additionally, in-situ tensile testing experiments inside a scanning electron microscope were performed to observe microstructural changes during deformation. The results were compared with local hardness and wear measurements. Because laser cladding does not achieve adequate accuracy, the effect of necessary post-grinding was investigated. According to the findings, the overlapping of beads and their mutual tempering significantly affect the mechanical properties. Further, the outer surface layer, which showed tensile surface residual stresses and cracks, was removed by grinding and surface compressive residual stresses were described on the ground surface. Workplace Nuclear Physics Institute Contact Markéta Sommerová, sommerova@ujf.cas.cz, Tel.: 266 173 228 Year of Publishing 2023 Electronic address https://doi.org/10.3390/met12020243
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