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Metals
Special Issues
High-Performance Alloys and Alloys Manufacturing
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High-Performance Alloys and Alloys Manufacturing

A special issue of Metals (ISSN 2075-4701). This special issue belongs to the section "Metallic Functional Materials".

Deadline for manuscript submissions: closed (30 July 2023) | Viewed by 2884

Special Issue Editors

Dr. Katakam Sivaprasad

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Guest Editor
Department of Metallurgical and Materials Engineering, National Institute of Technology Tiruchirappalli, Tiruchirappalli, India
Interests: super alloys; additive manufacturing; welding; characterization of strategic materials; high-entropy alloys; creep; forming
Special Issues, Collections and Topics in MDPI journals
Dr. P. Susila

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Guest Editor
Department of Mechanical Engineering, University College of Engineering, Anna University Trichy, Tiruchirappalli 620024, India
Interests: nuclear materials, superalloys, processing of high-performance alloys
Prof. Dr. Konda Gokuldoss Prashanth

E-Mail Website
Guest Editor
Head of the Additive Manufacturing Laboratory, Professor at the Department of Mechanical and Industrial Engineering, Tallinn University of Technology, Ehitajate Tee 5, 19086 Tallinn, Estonia
Interests: powder metallurgy; additive manufacturing; powder bed fusion processes (laser (SLM)/electron beam (EBM)); selective laser sintering (SLS); meta-stable materials (including amorphous materials); light metals; materials joining and structure–property correlation in metals
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The demand for new materials or materials with superior properties for high-performance applications, such as in automotive, petrochemical, nuclear, defense, and aerospace sectors, increases day-by-day. Such alloys do always have a high emphasis on their structural properties and process correlations. Some special sectors do have specific requirements such as abnormal performance for structural applications such as in superalloys. Few other sectors demand a superior performance for their functional applications. Additionally, not only does designing or selecting such materials play a key role, but also their manufacturing processes and parameters are going to be the key aspects.

Scientific contributions are invited from scientists, researchers, engineers, and industry to disseminate recent inventions and developments in the areas of high-performance alloy systems and their synthesis, characterization, properties, processing, and/or manufacturing. Manuscripts on computational aspects including simulations/modeling are also welcome.

Dr. Katakam Sivaprasad
Dr. P. Susila
Prof. Dr. Konda Gokuldoss Prashanth
Guest Editors

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.

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. Metals is an international peer-reviewed open access monthly 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 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

  • strategic materials
  • carbon-based systems
  • single crystal systems
  • cocktail alloy systems / high-entropy alloys for high-performance applications
  • intermetallics
  • ODS alloys
  • superalloys
  • additive manufacturing / 3-D printing
  • novel manufacturing processes
  • characterization and Nondestructive testing and evaluation

Published Papers (2 papers)

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Research

14 pages, 3495 KiB  
Article
Mechanical Characteristics and Corrosion Behavior of Two New Titanium Alloys
by Ionelia Voiculescu, Santiago Jose Brito-Garcia, Óscar M. González-Díaz and Julia Mirza-Rosca
Metals 2023, 13(10), 1729; https://doi.org/10.3390/met13101729 - 12 Oct 2023
Viewed by 944
Abstract
While Ti6Al4V is one of the most used titanium alloys in the biomaterials field, it is not without its challenges and limitations, among which very important is the modulus mismatch with the bone. This modulus mismatch can lead to stress shielding potentially leading [...] Read more.
While Ti6Al4V is one of the most used titanium alloys in the biomaterials field, it is not without its challenges and limitations, among which very important is the modulus mismatch with the bone. This modulus mismatch can lead to stress shielding potentially leading to bone resorption and implant loosening. Researchers continue to explore alternative materials and modifications to address this challenge and improve the performance of biomaterials. Two new fabricated titanium alloys Ti-10Al and Ti-4Fe are analyzed in this paper from corrosion and elastic modulus points of view. Metallography, microhardness, open circuit potential, DC electrochemical linear polarization, and Electrochemical Impedance Spectroscopy were performed. It was found that the corrosion resistance measurement for the Ti4Fe alloy is two orders of magnitude lower than for the Ti10Al alloy as determined by the equivalent circuit simulation, which is also supported by the similar disparity in the corrosion rate values for the two alloys which was determined using the DC method. The modulus of elasticity values were fairly close, hovering about 35GPa, and were lower than those of many commercial alloys. Full article
(This article belongs to the Special Issue High-Performance Alloys and Alloys Manufacturing)
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18 pages, 9392 KiB  
Article
Analysis on Bonding Interface during Solid State Additive Manufacturing between 18Cr-8Ni and 42CrMo4 High Performance Alloys
by Syed Quadir Moinuddin, Venkata Varalakshmi Machireddy, Vadla Raghavender, Tejonadha Babu Kaniganti, Venukumar Sarila, Shankar Madhuraveli Ponnappan, Ragavanantham Shanmugam and Muralimohan Cheepu
Metals 2023, 13(3), 488; https://doi.org/10.3390/met13030488 - 27 Feb 2023
Cited by 10 | Viewed by 1503
Abstract
The need for additive manufacturing (3D printing) to create near net shape components from a wide variety of materials has grown in recent years. There are several additive manufacturing methods to build various parts by different materials. However, it is challenging to construct, [...] Read more.
The need for additive manufacturing (3D printing) to create near net shape components from a wide variety of materials has grown in recent years. There are several additive manufacturing methods to build various parts by different materials. However, it is challenging to construct, the components with incompatible materials combination for high temperature and creep resistance using conventional methods. Consequently, the purpose of this research is to investigate the use of solid state welding (friction welding) in additive manufacturing (SSAM) of incompatible materials, namely alloy Cr18-Ni8 and 42CrMo4 low alloy alternative layers. The interface bonding strength must be strengthened to achieve the desired isotropic characteristics and high strength for the components. Due to the low temperature at the bonding interface, secondary phases cannot develop when solid state welding is used. In order to obtain the highest bonding strength, optimal process parameters were examined using design of experiments (DOE) with Box–Behnken design model and analysis of variance (ANOVA). The major process parameters of upset pressure, friction pressure and burn-off length were varied to obtain the optimal conditions. In addition, the bonded interfaces were examined by the microstructural characteristics as well as mechanical properties such as micro-hardness and bonding strength. The interface is made up of alloys intermixed with different zones such as a dynamically recrystallized zone and a thermomechanical affected zone. The intermixed layers revealed the migration of C and Mo to Cr18-Ni8 alloy and separated the Fe and Ni bands. The fractography analysis revealed ductile and slightly brittle fracture surfaces with a mixed mode. The relationship between bond strength and interface thickness was determined by studying the impact of interface thickness on bond strength. Full article
(This article belongs to the Special Issue High-Performance Alloys and Alloys Manufacturing)
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