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Advanced Manufacturing, Microstructure Engineering, and Multifunctional Applications of Modern Alloys and Composites

A Special Issue of Materials (ISSN 1996-1944) belonging to the section "Metals and Alloys".

Deadline for manuscript submissions: 31 December 2026 | Viewed by 1718

Editors


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Guest Editor
Machinery and Metal Technologies Department, Corlu Vocational School, Tekirdag Namik Kemal University, 59830 Tekirdag, Turkey
Interests: shape memory alloys; Ti-based alloys; semiconductor thin films; biomedical alloys

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Guest Editor Assistant
Division of Advanced Nuclear Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Republic of Korea
Interests: additively manufactured materials; shape memory alloys; Ti-based alloys; biomedical alloys

Special Issue Information

Dear Colleagues,

This Special Issue aims to showcase recent advances in the processing, microstructure engineering, and multifunctional applications of modern alloys and composites. Focus areas include shape memory alloys (SMAs), porous titanium-based biomaterials, and advanced manufacturing routes such as powder metallurgy, additive manufacturing, and severe plastic deformation.

SMAs (NiTi, FeMnAlNi) offer unique thermomechanical properties including superelasticity, shape memory effect, and high damping capacity – making them suitable not only for biomedical stents and actuators but also for seismic damping devices in civil engineering. Porous Ti-based alloys (TiNb, TiNbSn, TiZr, TiNbZr) are increasingly important for orthopedic and dental implants due to their low elastic modulus, corrosion resistance, and osseointegration capability. Furthermore, semiconductor thin films (ZnO, GaAs/Si) and diffusion-bonded dissimilar material couples (Ti-6Al-4V/steel) are included to reflect the growing demand for multifunctional material systems.

Topics of interest include, but are not limited to, the following:

  • Martensitic transformation, phase stability, and damping capacity of NiTi and FeMnAlNi SMAs;
  • Thermomechanical cyclic stability and superelastic response;
  • Powder metallurgy, additive manufacturing, and severe plastic deformation of porous Ti-based alloys;
  • Biocompatibility, corrosion behavior, and in vitro/in vivo evaluation;
  • Diffusion bonding of Ti-6Al-4V to steel and other dissimilar systems;
  • Semiconductor thin films (ZnO, GaAs/Si) for electronic and photonic applications;
  • Microstructure–property relationships using DSC, XRD, SEM‑EDS, TEM, and mechanical testing;
  • New alloy design strategies (Ti-rich NiTi, CuSn, CuSnMn, MgAl, …);
  • Seismic damping and civil engineering applications of SMAs;
  • Ceramic materials.

Both original research articles and comprehensive reviews are welcome. This Special Issue seeks to foster cross-disciplinary collaboration among materials scientists, physicists, chemists, mechanical engineers, and civil engineers.

Prof. Dr. Mehmet Kaya
Guest Editor

Dr. Ömer Çakmak
Guest Editor Assistant

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 250 words) can be sent to the Editorial Office for assessment.

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-anonymized 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 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

  • shape memory alloys
  • NiTi
  • FeMnAlNi
  • porous biomaterials
  • Ti-based alloys
  • powder metallurgy
  • additive manufacturing
  • severe plastic deformation
  • martensitic transformation
  • damping capacity
  • biocompatibility
  • semiconductor materials
  • diffusion bonding
  • seismic damping
  • Fe-based alloys

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Published Papers (2 papers)

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Research

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27 pages, 20780 KB  
Article
Fabrication and Wear Performance of Al Matrix Composites Reinforced with Metallic and Oxidized WMoNb Medium-Entropy Alloy Powders
by Muhammet Gökhan Albayrak
Materials 2026, 19(17), 3692; https://doi.org/10.3390/ma19173692 - 30 Aug 2026
Viewed by 237
Abstract
Aluminum matrix composites reinforced with refractory medium-entropy alloy particles are of growing interest for wear-resistant applications, yet the contribution of an oxidized core–shell reinforcement remains largely unexplored. This study investigates the fabrication and tribological performance of Al composites reinforced with WMoNb refractory medium-entropy [...] Read more.
Aluminum matrix composites reinforced with refractory medium-entropy alloy particles are of growing interest for wear-resistant applications, yet the contribution of an oxidized core–shell reinforcement remains largely unexplored. This study investigates the fabrication and tribological performance of Al composites reinforced with WMoNb refractory medium-entropy alloy (RMEA) powder and its oxidized derivative (RMEO). Equiatomic WMoNb powder was synthesized by 150 h high-energy ball milling, forming a single-phase BCC solid solution, then oxidized at 650 °C/4 h, selectively converting Mo and Nb into Mo4O11 and NbO0.76 while W remained metallic, yielding a core–shell RMEO structure. Composites containing 2.5–10 wt.% RMEA or RMEO were fabricated by cold pressing/sintering and evaluated by dry sliding wear testing (pin-on-disc, Al2O3 counterpart). Both reinforcements reduced friction and wear loss relative to pure Al in a dose-dependent manner; RMEO outperformed RMEA at every ratio, cutting friction and wear loss by ~60% at 10 wt.% and reaching the highest hardness (132 HB) of all compositions. Worn-surface and profilometric analyses revealed a wear-mechanism shift from severe adhesive/abrasive wear in pure Al to a tribo-oxide-mediated regime in RMEO composites. These findings indicate that selective oxidation of refractory medium-entropy alloy powders is an effective strategy for enhancing the wear resistance of Al matrix composites. Full article
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Review

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48 pages, 2183 KB  
Review
Porous Ti-6Al-4V Architectures in Load-Bearing Orthopedic Reconstruction: A Critical Narrative Review of the Translational Gap Across Microstructure, Fatigue, Surface Function, and Clinical Failure Modes
by Gündüz Ercan Kutluay, Fatih Erdoğan and Yaşar Mahsut Dinçel
Materials 2026, 19(18), 3860; https://doi.org/10.3390/ma19183860 - 10 Sep 2026
Viewed by 182
Abstract
An aging population and a rising revision burden are increasing demand for bone-compatible load-bearing implants. Because the elastic modulus of conventional Ti-6Al-4V (~110 GPa) exceeds that of cortical bone (7–30 GPa), stress shielding can drive bone resorption and aseptic loosening. Two solution lines [...] Read more.
An aging population and a rising revision burden are increasing demand for bone-compatible load-bearing implants. Because the elastic modulus of conventional Ti-6Al-4V (~110 GPa) exceeds that of cortical bone (7–30 GPa), stress shielding can drive bone resorption and aseptic loosening. Two solution lines have emerged: low-modulus β-type alloys and porous architectures. Focusing on additive manufacturing (AM), this critical narrative review synthesizes the evidence along the axis of clinical failure modes. Materials science has lowered β-Ti’s modulus to ~40 GPa in bulk, yet clinical implants rely predominantly on porous conventional Ti-6Al-4V: the low effective modulus (single-digit GPa) comes from architecture, not alloying. These architectures range from porous fixation surfaces on solid acetabular shells to predominantly porous constructs—revision knee cones and sleeves, acetabular augments, and spinal interbody cages. In the acetabular cohorts, where clinical evidence is concentrated, short- to mid-term survivorship is favorable though heterogeneous; revisions were driven mainly by infection and instability, with aseptic loosening low. Two tools are proposed: a synthesis matrix setting laboratory claims alongside clinical evidence for each design parameter, and a 16-item minimum reporting checklist. Applied to the 12 primary series reviewed, the checklist found manufacturing and architecture-verification parameters largely unreported even where clinical outcomes are well documented. Full article
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