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Improving Alloy Material Performance: Alloy design, Structural Modification and Advanced Processing

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Manufacturing Processes and Systems".

Deadline for manuscript submissions: closed (15 April 2021) | Viewed by 6023

Special Issue Editor


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Guest Editor
University of Chemistry and Technology, Prague, Prague, Czech Republic
Interests: alloys design; aluminum alloys structure; microscopy; rapidly solidified alloys; self-healing materials

Special Issue Information

Dear Colleagues,

As the guest editor of the following Special Issue of Materials, I would like to invite you to contribute a research paper to the Issue on the topic of “Improving Alloy Material Performance: Alloy Design and Structural Modification”. The Issue will cover several scientific problems. Among them, the main focus will be aimed at alloy design (new alloys composition, influence of alloying elements on properties of common alloys, and new alloys processing leading to structural changes), a description of the microstructure influence on the improvement of alloy properties (e.g., additive manufacturing, powder metallurgy processing, rapid solidification, and grain boundary engineering), and the new unique properties of alloy materials (e.g., self-reporting materials, self-healing materials, and biodegradable alloys).

I would greatly appreciate a reply to this invitation, letting us know whether you would like to contribute.

We look forward to collaborating with you in the near future.

Dr. Alena Michalcová
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 submissions that pass pre-check are 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.

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Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 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

  • alloy design
  • alloy structure
  • high performance materials
  • unique properties of materials
  • structural modification of alloys

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Published Papers (2 papers)

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Research

18 pages, 8347 KiB  
Article
Combined Manufacturing Process of Copper Electrodes for Micro Texturing Applications (AMSME)
by Carlos J. Sánchez, Pedro M. Hernández, María D. Martínez, María D. Marrero and Jorge Salguero
Materials 2021, 14(10), 2497; https://doi.org/10.3390/ma14102497 - 12 May 2021
Cited by 3 | Viewed by 2248
Abstract
Surface texturing has brought significant improvements in the functional properties of parts and components. Sinker electro discharge machining (SEDM) is one of the processes which generates great texturing results at different scale. An electrode is needed to reproduce the geometry to be textured. [...] Read more.
Surface texturing has brought significant improvements in the functional properties of parts and components. Sinker electro discharge machining (SEDM) is one of the processes which generates great texturing results at different scale. An electrode is needed to reproduce the geometry to be textured. Some geometries are difficult or impossible to achieve on an electrode using conventional and even unconventional machining methods. This work sets out the advances made in the manufacturing of copper electrodes for electro erosion by additive manufacturing, and their subsequent application to the functional texturing of Al-Cu UNS A92024-T3 alloy. A combined procedure of digital light processing (DLP) additive manufacturing, sputtering and micro-electroforming (AMSME), has been used to produce electrodes. Also, a specific laboratory equipment has been developed to reproduce details on a microscopic scale. Shells with outgoing spherical geometries pattern have been manufactured. AMSME process has shown ability to copper electrodes manufacturing. A highly detailed surface on a micrometric scale have been achieved. Copper shells with minimum thickness close to 300 µm have been tested in sinker electro discharge machining (SEDM) and have been shown very good performance in surface finishing operations. The method has shown great potential for use in surfaces texturing. Full article
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21 pages, 13726 KiB  
Article
Bending Fatigue Behaviors Analysis and Fatigue Life Prediction of 20Cr2Ni4 Gear Steel with Different Stress Concentrations near Non-metallic Inclusions
by Zhiguo Xing, Zhiyuan Wang, Haidou Wang and Debin Shan
Materials 2019, 12(20), 3443; https://doi.org/10.3390/ma12203443 - 21 Oct 2019
Cited by 11 | Viewed by 3097
Abstract
To investigate the relationship between inclusions and bending fatigue behaviors in 20Cr2Ni4 steel under different stress concentrations. This paper designs a new experimental method to prefabricate different size stress concentrations near the inclusions, and then conducts a new type of bending fatigue test [...] Read more.
To investigate the relationship between inclusions and bending fatigue behaviors in 20Cr2Ni4 steel under different stress concentrations. This paper designs a new experimental method to prefabricate different size stress concentrations near the inclusions, and then conducts a new type of bending fatigue test to study the inclusions and their surrounding stress distributions in 20Cr2Ni4 steel. A microhardness tester was combined with laser etching equipment to realize the prefabrication of different stress concentrations at arbitrary positions around any inclusion on the gear steel surface. This method provides an experimental basis for the quantitative analysis of the relationship between stress distribution and fatigue life around the inclusions of heavy-duty gear steels. We also predict the bending fatigue lives of heavy-duty gear steels with different types of inclusions, stress states, and spatial distributions. Then, based on the prefabricated notch parameters and the state of inclusions in the steel, a mathematical model of quantitative analysis is proposed, which can accurately predict the fatigue limit of heavy-duty gear steel. The research results can be applied to the actual use of heavy-duty gears and to the accurate life estimation based on the state of gear stress, thereby providing a quantitative reference model for subsequent gear steel production and gear part processing. Full article
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