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Number of results: 7
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Abstract

In this paper, the influence of Mo addition on the structure and mechanical properties of the NiCoMnIn alloys have been studied. Series of polycrystalline NiCoMnIn alloys containing from 0 to 5 mas.% of Mo were produced by the arc melting technique. For the alloys containing Mo, two-phase microstructure was observed. Mo-rich precipitates were distributed randomly in the matrix. The relative volume fraction of the precipitates depends on the Mo content. The numbers of the Mo rich precipitates increases with the Mo contents. The structures of the phases were determined by the TEM. The mechanical properties of the alloys are strongly affected by Mo addition contents. Brittleness of the alloys increases with the Mo contents.

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Authors and Affiliations

K. Prusik
E. Matyja
M. Wąsik
M. Zubko
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Abstract

An equiatomic multi-component alloy Ni20Ti20Ta20Co20Cu20 (at. %) was obtained using vacuum arc melting. In order to characterize such an alloy, microstructure analysis has been performed using Scanning and Transmission Electron Microscopy, Electron Backscattered Diffraction, X-ray Diffraction and Energy Dispersive X-ray Spectroscopy techniques. Microstructure analysis revealed the presence of one rhombohedral and two cubic phases. Energy Dispersive X-ray Spectroscopy measurements revealed that both observed phases include five chemical elements in the structure. Using Rietveld refinement approach the lattice parameters were refined for the observed phases.

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Authors and Affiliations

K. Glowka
M. Zubko
P. Świec
K. Prusik
G. Dercz
D. Stróż
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Abstract

A new NiTi-based multi-component Ni35Ti35Ta10Co10Cu10 (at.%) alloy was obtained by vacuum arc melting. The microstructure of the alloy has been studied using scanning and transmission electron microscopy, backscatter electron diffraction and X-ray diffraction techniques. The performed measurements showed presence of two cubic and one tetragonal phases. Energy dispersive X-ray spectroscopy analysis confirmed that all the observed phases contained all five principal elements.

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Authors and Affiliations

K. Glowka
M. Zubko
P. Świec
K. Prusik
G. Dercz
E. Matyja
D. Stróż
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Abstract

Scientists and medics are still searching for new metallic materials that can be used in medicine, e.g., as material for implants. The following article proposes materials based on titanium with vital elements prepared by combined powder metallurgy and arc melting methods. Four compositions of Ti-28Ta-9Nb, Ti-28Ta-19Nb, Ti-28Ta-9Zr and Ti-28Ta-19Zr (wt.%) have been prepared. The tested material was thoroughly analyzed by X-ray diffraction and scanning electron microscopy. Qualitative phase analysis using X-ray diffraction showed the presence of two phases, α' and β titanium. In addition, a microhardness test was conducted, and the material was characterized in terms of corrosion properties. It was found that the corrosion resistance decreases with an increase of the β phase presence.
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Authors and Affiliations

I. Matuła
1
ORCID: ORCID
G. Dercz
1
ORCID: ORCID
K. Prusik
1
ORCID: ORCID
M. Szklarska
1
ORCID: ORCID
A. Kazek-Kęsik
2
ORCID: ORCID
W. Simka
2
ORCID: ORCID
E. Sudoł
3

  1. University of Silesia in Katowice, Institute of Materials Engineering, 75 Pułku Piechoty Str., 1 A, 41-500 Chorzów, Poland
  2. Silesian University of Technology, Faculty of Chemistry, 6 B. Krzywoustego Str., 44-100 Gliwice, Poland
  3. Graduate, Institute of Materials Engineering, University of Silesia in Katowice, 75 Pułku Piechoty Street 1 A, 41-500 Chorzów, Poland
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Abstract

This work investigated two titanium-based alloys with a constant tantalum content and variable contents of alloy additives – niobium and zirconium. The Ti-30Ta-10Zr-20Nb (wt.%) and Ti-30Ta-20Zr-10Nb (wt.%) alloys were obtained using a combination of powder metallurgy and arc melting methods. The influence of alloying additives on the structure and properties of the Ti-Ta-Nb-Zr system was studied using, among others: X-ray diffraction and scanning electron microscopy. The X-ray diffraction confirmed the single-β-phase structure of both alloys. In addition, the microscopic analysis revealed that a higher amount of zirconium favoured the formation of larger grains. However, the microhardness analysis indicated that the alloy with the higher niobium content had the higher microhardness. Importantly, the in vitro corrosion study revealed that the addition of niobium promoted the better corrosion resistance of the investigated alloy.
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Authors and Affiliations

G. Dercz
1
ORCID: ORCID
I. Matuła
1
ORCID: ORCID
K. Prusik
1
ORCID: ORCID
J. Zając
1
M. Szklarska
1
ORCID: ORCID
A. Kazek-Kęsik
2
ORCID: ORCID
W. Simka
2
ORCID: ORCID

  1. Institute of Materials Engineering, University of Silesia in Katowice, 75 Pułku Piechoty Street 1 A, 41-500 Chorzów, Poland
  2. Faculty of Chemistry, Silesian University of Technology, B. Krzywoustego Street 6, 44-100 Gliwice, Poland
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Abstract

In the presented work, two multicomponent Cr 25Z 25Co 20Mo 15Si 10Y 5 and Cr 25Co 25Zr 20Mo 15Si 10Y 5 alloys were produced from bulk chemical elements using the vacuum arc melting technique. X-ray diffraction phase analysis was used to determine the phase composition of the obtained materials. Microstructure analysis included scanning electron microscopy and energy dispersive X-ray spectroscopy techniques. The studies revealed the presence of multi-phase structures in both alloys. Elemental distribution maps confirmed the presence of all six alloying elements in the microstructure. The segregation of chemical elements was also observed. Microhardness measurement revealed that both alloys exhibited microhardness from 832(27) to 933(22) HV1.
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Authors and Affiliations

K. Glowka
1
ORCID: ORCID
M. Zubko
1
ORCID: ORCID
K. Piotrowski
1
ORCID: ORCID
P. Świec
1
ORCID: ORCID
K. Prusik
1
ORCID: ORCID
R. Albrecht
1
ORCID: ORCID
D. Stróż
1
ORCID: ORCID

  1. University of Silesia in Katowice, Institute of Materials Engeenering, Chorzów, Poland

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