Structure and Properties of Metallic Based Functional Materials and Alloys

A special issue of Metals (ISSN 2075-4701).

Deadline for manuscript submissions: closed (30 November 2021) | Viewed by 8184

Special Issue Editor


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Guest Editor
1. Institute of Materials Engineering, Faculty of Science and Technology, University of Silesia in Katowice, Chorzów, Poland
2. Silesian Centre for Education and Interdisciplinary Research, Chorzów, Poland
Interests: Shape memory alloys; magnetic shape memory alloys; structure; electron microscopy; TEM; SEM; XRD; EBSD; MSMA; FSMA

Special Issue Information

Dear Colleagues,

Due to the exponential growth of energy consumption, a vital priority for researchers is designing new materials that can fulfill the energy requirements, reduce the environmental risks, and health problems as well. The functionalization of the materials has major potential as a response to the growing challenges in the fields of energy, environment, and health applications. This demand leads to the rapid global development of the new and novel materials among which alloys and functional materials are the most important groups. Materials with improved functional properties have not only attracted more and more attention from researchers, but are also required in a wide range of advanced technology fields.

However, the functional properties of the materials are tightly correlated with their structure.

This Special Issue presents the original papers in which the authors correlate the properties of a novel metallic based materials with their structure. We are particularly interested in presenting results of the metallic based:

1)    Advanced functional materials                         
2)    Novel alloys and compounds
3)    Smart materials
4)    Biological and biocompatible based materials
5)    Micro and nanostructured materials


Dr. Krystian Prusik
Guest Editor

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Keywords

  • Structure and properties of the metallic based materials
  • Functional materials
  • Novel alloys and compounds
  • Magnetic actuators
  • Shape memory alloys
  • Smart materials
  • Biological and biocompatible-based materials
  • Micro and nanostructured materials

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Published Papers (3 papers)

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Research

12 pages, 5351 KiB  
Article
Influence of Batch Mass on Formation of NiTi Shape Memory Alloy Produced by High-Energy Ball Milling
by Tomasz Goryczka and Piotr Salwa
Metals 2021, 11(12), 1908; https://doi.org/10.3390/met11121908 - 26 Nov 2021
Cited by 5 | Viewed by 1494
Abstract
A high-energy ball milling technique was used for production of the equiatomic NiTi alloy. The grinding batch was prepared in two quantities of 10 and 20 g. The alloy was produced using various grinding times. Scanning electron microscopy, X-ray diffraction, hardness measurement and [...] Read more.
A high-energy ball milling technique was used for production of the equiatomic NiTi alloy. The grinding batch was prepared in two quantities of 10 and 20 g. The alloy was produced using various grinding times. Scanning electron microscopy, X-ray diffraction, hardness measurement and differential scanning calorimetry were used for materials characterization at various milling stages. The produced alloy was studied by means of microstructure, chemical and phase composition, average grain and crystallite size, crystal lattice parameters and microstrains. Increasing the batch mass to 20 g and extending the grinding time to 140 h caused the increase in the average size of the agglomerates to 700 µm while the average crystallites size was reduced to a few nanometers. Microstrains were also reduced following elongation of milling time. Moreover, when the grinding time is extended, the amount of the monoclinic phase increases at the expense of the body-centered cubic one—precursors of crystalline, the B2 parent phase and the B19′ martensite. Crystallization takes place as a multistage process, however, at temperatures below 600 °C. After crystallization, the reversible martensitic transformation occurred with the highest enthalpy value—4 or 5 J/g after 120 and 140 h milling, respectively. Full article
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12 pages, 6600 KiB  
Article
Analysis of Stainless Steel Waste Products Generated during Laser Cutting in Nitrogen Atmosphere
by Maciej Zubko, Jan Loskot, Paweł Świec, Krystian Prusik and Zbigniew Janikowski
Metals 2020, 10(12), 1572; https://doi.org/10.3390/met10121572 - 25 Nov 2020
Cited by 6 | Viewed by 2941
Abstract
Laser cutting technology is one of the basic approaches used for thermal processing of parts fabricated from almost all engineering materials. Various types of lasers are utilized in the industry with different attendant gases such as nitrogen or argon. When the laser beam [...] Read more.
Laser cutting technology is one of the basic approaches used for thermal processing of parts fabricated from almost all engineering materials. Various types of lasers are utilized in the industry with different attendant gases such as nitrogen or argon. When the laser beam interacts with a metal surface, the area underneath is heated to the melting point. This liquid or vaporized metal is ejected from the kerf area to the surrounding atmosphere by attendant gas and becomes undesirable waste in the form of powder. In the presented work, the X-ray diffraction, scanning electron microscopy, electron backscatter diffraction, transmission electron microscopy, and energy-dispersive X-ray spectroscopy methods were used to analyze AISI 304 stainless steel, which was cut by a semiconductor fiber laser, and the waste powder generated during the laser cutting process. The results suggest that this waste material may be reused for industrial applications such as additive manufacturing. Full article
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16 pages, 2863 KiB  
Article
Microstructure and Mechanical Properties of Co-Cr-Mo-Si-Y-Zr High Entropy Alloy
by Karsten Glowka, Maciej Zubko, Paweł Świec, Krystian Prusik, Robert Albrecht, Grzegorz Dercz, Jan Loskot, Bartosz Witala and Danuta Stróż
Metals 2020, 10(11), 1456; https://doi.org/10.3390/met10111456 - 30 Oct 2020
Cited by 7 | Viewed by 3109
Abstract
Presented work was focused on obtaining new, up to our knowledge, non-described previously in the literature high entropy Co15Cr15Mo25Si15Y15Zr15 alloy to fill in the knowledge gap about the six-elemental alloys located in [...] Read more.
Presented work was focused on obtaining new, up to our knowledge, non-described previously in the literature high entropy Co15Cr15Mo25Si15Y15Zr15 alloy to fill in the knowledge gap about the six-elemental alloys located in the adjacent to the center of phase diagrams. Material was obtained using vacuum arc melting. Phase analysis revealed the presence of a multi-phase structure. Scanning electron microscopy microstructure analysis revealed the existence of three different phases with partially dendritic structures. Chemical analysis showed that all phases consist of all six principal elements—however, with different proportions. Transmission electron microscopy microstructure analysis confirmed the presence of amorphous and nanocrystalline areas, as well as their mixture. For the studied alloy, any phase transformation and solid-state crystallization were not revealed in the temperature range from room temperature up to 1350 °C. Nanoindentation measurements revealed high nanohardness (13(2) GPa and 18(1) GPa for dendritic and interdendritic regions, respectively) and relatively low Young’s modulus (185(23) GPa and 194(9) GPa for dendritic and interdendritic regions, respectively) of the observed phases. Full article
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