Special Issue "Structure and Mechanical Properties of Alloys"

A special issue of Materials (ISSN 1996-1944).

Deadline for manuscript submissions: 15 December 2019.

Special Issue Editor

Guest Editor
Prof. Dr. Tomasz Tański Website E-Mail
Institute of Engineering Materials and Biomaterials, Silesian University of Technology, Gliwice, Poland
Interests: light alloys; nanomaterials; thin films; research method; mechanical properties; structure; surface engineering

Special Issue Information

Dear Colleagues,

The dynamic industry development is demanding higher and higher requirements for present constructions and elements in relation to the anticipated working conditions and existing real needs, thus supporting as well as directing the progress in the field of material engineering and favouring the production, testing, and analysis of new materials. Modern, advanced engineering materials allow for the design of more advanced, safe-to-use, and energy-saving constructions, characterised by significantly better corrosion resistance and higher mechanical strength compared to the materials used until recently. Contemporary trends in material engineering related to metallic materials concern mainly the reduction of their grain size, structure modifications using thermal, chemical, and mechanical treatment, as well as the decrease of the specific weight of the finished elements by using light metal alloys such as those containing aluminium, magnesium, and titanium. This Special Issue will focus on the influence of special treatment processes on the evolution of the microstructure and the properties of metal alloys.

Prof. Tomasz Tański
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All papers will be peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Materials is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 1800 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • metallic alloys
  • non-ferrous alloys
  • mechanical properties
  • manufacturing
  • heat treatment
  • nanostructured, structure–property correlations
  • advanced materials characterization

Published Papers (3 papers)

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Research

Open AccessArticle
Effect of Heat Treatment Temperature on Martensitic Transformation and Superelasticity of the Ti49Ni51 Shape Memory Alloy
Materials 2019, 12(16), 2539; https://doi.org/10.3390/ma12162539 - 09 Aug 2019
Abstract
The martensitic transformation and superelasticity of Ti49Ni51 shape memory alloy heat-treatment at different temperatures were investigated. The experimental results show that the microstructures of as-cast and heat-treated (723 K) Ni-rich Ti49Ni51 samples prepared by rapidly-solidified technology are [...] Read more.
The martensitic transformation and superelasticity of Ti49Ni51 shape memory alloy heat-treatment at different temperatures were investigated. The experimental results show that the microstructures of as-cast and heat-treated (723 K) Ni-rich Ti49Ni51 samples prepared by rapidly-solidified technology are composed of B2 TiNi phase, and Ti3Ni4 and Ti2Ni phases; the microstructures of heat-treated Ti49Ni51 samples at 773 and 823 K are composed of B2 TiNi phase, and of B2 TiNi and Ti2Ni phases, respectively. The martensitic transformation of as-cast Ti49Ni51 alloy is three-stage, A→R→M1 and R→M2 transformation during cooling, and two-stage, M→R→A transformation during heating. The transformations of the heat-treated Ti49Ni51 samples at 723 and 823 K are the A↔R↔M/A↔M transformation during cooling/heating, respectively. For the heat-treated alloy at 773 K, the transformations are the A→R/M→R→A during cooling/heating, respectively. For the heat-treated alloy at 773 K, only a small thermal hysteresis is suitable for sensor devices. The stable σmax values of 723 and 773 K heat-treated samples with a large Wd value exhibit high safety in application. The 773 and 823 K heat-treated samples have large stable strain–energy densities, and are a good superelastic alloy. The experimental data obtained provide a valuable reference for the industrial application of rapidly-solidified casting and heat-treated Ti49Ni51 alloy. Full article
(This article belongs to the Special Issue Structure and Mechanical Properties of Alloys)
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Open AccessArticle
Mechanical and Corrosion Properties of Mg-Based Alloys with Gd Addition
Materials 2019, 12(11), 1775; https://doi.org/10.3390/ma12111775 - 31 May 2019
Abstract
Magnesium alloys with rare earth metals are very attractive materials for medical application because of satisfactory mechanical properties. Nevertheless, low corrosion resistance is an obstacle in the use of Mg alloys as resorbable orthopedic implants. The paper presents results of mechanical and corrosion [...] Read more.
Magnesium alloys with rare earth metals are very attractive materials for medical application because of satisfactory mechanical properties. Nevertheless, low corrosion resistance is an obstacle in the use of Mg alloys as resorbable orthopedic implants. The paper presents results of mechanical and corrosion properties of MgCa5-xZn1Gdx (x = 1, 2, and 3 wt. %) alloys. Based on the microscopic observations it was stated that the studied alloys show a dendritic microstructure with interdendritic solute rich regions. The phase analysis reveals an occurrence of α-Mg and Mg2Ca, Ca2Mg6Zn3 phases that are thermodynamic predictions, and stated Mg26Zn59Gd7 phases in MgCa5-xZn1Gdx (x = 1, 2, and 3 wt. %) alloys. The Mg26Zn59Gd7 phases are visible as lamellar precipitations along interdendritic regions. It was confirmed that an increase of Gd content from 1 to 3 wt. % improves ultimate tensile (Rm; from 74 to 89 MPa) and compressive strength (Rc; from 184 to 221 MPa). Moreover, the studied alloys are active in Ringer’s solution. They are characterized by an increase of corrosion potential (Ecorr) of about 150 mV in comparison with values of open circuit potential (EOCP). The best electrochemical parameters (e.g., corrosion current density, icorr, polarization resistance, Rp, and Ecorr) were obtained for the MgCa3Zn1Gd2 alloy. Full article
(This article belongs to the Special Issue Structure and Mechanical Properties of Alloys)
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Open AccessArticle
Strengthening of the Fe-Ni Invar Alloy Through Chromium
Materials 2019, 12(8), 1297; https://doi.org/10.3390/ma12081297 - 20 Apr 2019
Abstract
Invar alloys with both high strength and low thermal expansion are urgently needed in fields such as overhead power transmission, aero-molds, and so on. In this paper, Cr was introduced as a cost-efficient alloying element into the Fe-36Ni binary invar alloy to increase [...] Read more.
Invar alloys with both high strength and low thermal expansion are urgently needed in fields such as overhead power transmission, aero-molds, and so on. In this paper, Cr was introduced as a cost-efficient alloying element into the Fe-36Ni binary invar alloy to increase its mechanical strength. Our results confirmed that fine Cr7C3 precipitants, together with some Fe3C, in the invar alloy aged at 425 °C could be obtained with a short aging time. Those precipitants then grew and aggregated at grain or sub-grain boundaries with an increase in aging time. Simultaneously, mechanical strength and coefficient of thermal expansion (CTE) parabolically varied with the increase in aging time. The sample aged at 425 °C for 7 h presented a maximum strength of 644.4 MPa, together with a minimum coefficient of thermal expansion of 3.30 × 10−6 K−1 in the temperature range of 20–100 °C. This optimized result should be primarily attributed to the precipitation of the nanoscaled Cr7C3. Full article
(This article belongs to the Special Issue Structure and Mechanical Properties of Alloys)
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Planned Papers

The below list represents only planned manuscripts. Some of these manuscripts have not been received by the Editorial Office yet. Papers submitted to MDPI journals are subject to peer-review.

1. Title: Comparison between Mechanical Properties and Structures of a Rolled and a 3-D Printed Stainless Steel

Authors: Andrea Brotzu, Stefano Natali and Daniela Pilone

2. Title: Tailoring Mechanical Properties of a Novel Nb-Mo Microalloyed 6.5Mn Steel by Controlling Heterogeneous Complex Microstructure and Nano-Precipitation

Authors: Shan Liu, Minghui Cai, Wenxia Li, Junhua Su and Yunpeng Wang

3. Title: Annealing Behaviour of the AlMg3 Alloy Deformed by DRECE Method

Authors: P. Snopiński, T. Tański, S. Rusz and O. Hilser

4. Author: Dongxing Zhang

5. Author: Shuguo Zheng

6. Author: Bin Yang

7. Author: Y. F. Shen

8. Author: Gang Han

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