K
Krzysztof Grzelak
Researcher at Military University of Technology in Warsaw
Publications - 46
Citations - 260
Krzysztof Grzelak is an academic researcher from Military University of Technology in Warsaw. The author has contributed to research in topics: Ultimate tensile strength & Medicine. The author has an hindex of 6, co-authored 32 publications receiving 110 citations.
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The Influence of Exposure Energy Density on Porosity and Microhardness of the SLM Additive Manufactured Elements
TL;DR: The results of porosity and microhardness analysis made on specimens manufactured during a specially prepared process helped to discover connections between changing hatching distance, exposure speed and porosity.
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The Examination of Restrained Joints Created in the Process of Multi-Material FFF Additive Manufacturing Technology.
Janusz Kluczyński,Lucjan Śnieżek,Alexander Kravcov,Krzysztof Grzelak,Pavel Svoboda,Ireneusz Szachogłuchowicz,Ondřej Franek,Nikolaj Morozov,Janusz Torzewski,Petr Kubeček +9 more
TL;DR: The article presents the outcomes of a non-destructive materials test in the form of the data from the Laser Amplified Ultrasonography, microscopic observations of the joints area and tensile tests of the specially designed samples.
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A Critical Review on Effect of Process Parameters on Mechanical and Microstructural Properties of Powder-Bed Fusion Additive Manufacturing of SS316L.
Meet Gor,Harsh Soni,Vishal Ashok Wankhede,Pankaj Sahlot,Krzysztof Grzelak,Ireneusz Szachgluchowicz,Janusz Kluczyński +6 more
TL;DR: In this article, the effect of various input parameters, i.e., laser power, scanning speed, hatch spacing, and layer thickness, on various mechanical properties of additive manufacturing (AM) SS316L, such as tensile strength, hardness, and effect of porosity, along with the microstructure evolution is also discussed.
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Microstructure and Low Cycle Fatigue Properties of AA5083 H111 Friction Stir Welded Joint
TL;DR: It was determined that fatigue cracks are initiated by cyclic slip deformation due to local stress concentration from the surface in the corner of the samples for the base material and the heat-affected zone for FSW joints.
Journal ArticleDOI
Influence of Selective Laser Melting Technological Parameters on the Mechanical Properties of Additively Manufactured Elements Using 316L Austenitic Steel.
Janusz Kluczyński,Lucjan Śnieżek,Krzysztof Grzelak,Jacek Janiszewski,Paweł Płatek,Janusz Torzewski,Ireneusz Szachogłuchowicz,Krzysztof Gocman +7 more
TL;DR: The main aim of this study was to investigate the influence of different energy density values used for the additively manufactured elements using selective laser melting (SLM) and the porosity growth mechanism and its influence on the material strength (including static and dynamic tests).