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Number of results: 5
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Abstract

In this paper, the microstructure of laser beam welded Sc-modified AA2519-F has been taken under investigation. The welded joint has been produced using Fanuc 710i industrial robot equipped with YLS-6000 6 kW laser beam source. The welding speed and laser power were equal to 0.75 m/min and 3.2 kW, respectively. The investigation involved microstructure observations with the use of both light microscope and scanning electron microscope with energy dispersive spectroscopy (EDS) analysis of chemical composition and microhardness distribution measurements. It has been stated that laser beam welding allows to obtain Sc-modified AA2519-F weld of good quality, characterized by the presence of an equiaxed grain zone containing scandium-rich precipitates adjacent to the fusion boundary.
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Authors and Affiliations

R. Kosturek
1
ORCID: ORCID
L. Śnieżek
1
ORCID: ORCID
K. Grzelak
1
ORCID: ORCID
M. Wachowski
1
ORCID: ORCID

  1. Military University of Technology, Faculty of Mechanical Engineering, 2 gen. S. Kaliskiego Str., 00-908 Warszawa, Poland
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Abstract

The paper has presented the results of theoretical studies and experimental tests of the plastic deformation of multi-layered Ti/Al/Mg specimens. Theoretical studies were carried out using the Forge2011® computer program. Physical modeling, on the other hand, was performed using the Gleeble3800 simulator. Cuboidal specimens were cut off from the plates obtained in the explosive welding method. Based on the obtained investigation results it has been found non uniform deformation of the particular layer as a result their different value of flow stress.

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Authors and Affiliations

S. Mróz
A. Stefanik
P. Szota
M. Kwapisz
M. Wachowski
ORCID: ORCID
L. Śnieżek
ORCID: ORCID
A. Gałka
Z. Szulc
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Abstract

Industries that rely on additive manufacturing of metallic parts, especially biomedical companies, require material science-based knowledge of how process parameters and methods affect the properties of manufactured elements, but such phenomena are incompletely understood. In this study, we investigated the influence of selective laser melting (SLM) process parameters and additional heat treatment on mechanical properties. The research included structural analysis of residual stress, microstructure, and scleronomic hardness in low-depth measurements. Tensile tests with specimen deformation analysis using digital image correlation (DIC) were performed as well. Experiment results showed it was possible to observe the porosity growth mechanism and its influence on the material strength. Specimens manufactured with 20% lower energy density had almost half the elongation, which was directly connected with the porosity growth during energy density reduction. Hot isostatic pressing (HIP) treatment allowed for a significant reduction of porosity and helped achieve properties similar to specimens manufactured using different levels of energy density.

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Authors and Affiliations

J. Kluczyński
L. Śnieżek
ORCID: ORCID
K. Grzelak
ORCID: ORCID
A. Oziębło
K. Perkowski
J. Torzewski
I. Szachogłuchowicz
K. Gocman
M. Wachowski
ORCID: ORCID
B. Kania

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