Preliminary communication

Evaluation of the impact energy of the samples produced by the additive manufacturing technology

J. Dobránsky ; Technical University of Košice, Faculty of Manufacturing Technologies with a seat in Prešov, Slovak Republic
M. Kočiško ; Technical University of Košice, Faculty of Manufacturing Technologies with a seat in Prešov, Slovak Republic
P. Baron ; Technical University of Košice, Faculty of Manufacturing Technologies with a seat in Prešov, Slovak Republic
V. Simkulet ; Technical University of Košice, Faculty of Manufacturing Technologies with a seat in Prešov, Slovak Republic
L. Běhálek ; Technical University of Liberec, Faculty of Mechanical Engineering, Liberec, Czech Republic
E. Vojnová ; 1.PN Moulds and Tools, Prešov, Slovak Republic
L'. Nováková-Marcinčinová ; Technical University of Košice, Faculty of Manufacturing Technologies with a seat in Prešov, Slovak Republic

Abstract

The article covered the evaluation of the impact energy, notch toughness and morphology of the fracture surfaces of the specimens manufactured by the Direct Metal Laser Sintering Technology. Specimens without heat treatment with no notch were not broken through in course of testing, therefore there was no fracture surface present. The heat treatment resulted in the increase in hardness values. The values of impact energy after the heat treatment was approximately 60 % lower. Ductile intergranular fracture with more or less segmented dimple morphology appeared in every specimen. At places where the internal plastic bond was resisting the test, cracks remaining after particles broke away from the surface can be seen as craters.

Keywords

metal powder; mechanical properties; impact energy; fracture; surface

Hrčak ID:

153689

URI

https://hrcak.srce.hr/153689

Publication date:

1.7.2016.

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