Special Issue "Advances in Titanium Alloys: Mechanical Properties, Microstructure and Ultrasonic Impact Treatment"

A special issue of Metals (ISSN 2075-4701). This special issue belongs to the section "Metal Casting, Forming and Heat Treatment".

Deadline for manuscript submissions: 30 June 2023 | Viewed by 161

Special Issue Editor

Institute of Strength Physics and Materials Science, Siberian Branch of Russian Academy of Sciences, Tomsk 634055, Russia
Interests: additive manufacturing; titanium alloys; microstructure; phase transformation; ultrasonic impact treatment; surface hardening; deformation

Special Issue Information

Dear Colleagues,

Due to the remarkable combination of high strength-to-weight ratio, strong resistance to creep, excellent corrosion resistance, and low heat conductivity, titanium and its alloys have been extensively used in a wide range of applications in aerospace, biomedical, chemical, marine, automotive, and many other industries. However, the poor wear resistance of titanium alloys is still the main shortcoming that restricts their applications, particularly in areas involving friction and wear.

Currently, ultrasonic impact treatment (UIT) and its modifications (ultrasonic impact peening, ultrasonic nanostructural surface modification, etc.) are effective methods for surface hardening that significantly improves functional properties of structural materials, as well as their welded joints. Surface deformation by means of a metallic striker oscillating with ultrasonic frequency is accompanied by refinement of grains and subgrains in polycrystalline materials down to nano- and submicron-size ranges, development of compressive stresses in the surface layer of the specimens, a decrease in surface roughness, etc., that considerably increases the yield point and the tensile strength, the fatigue strength, the wear resistance, the corrosion resistance, and other characteristics of structural materials. Unlike shot peening, sandblasting, SMAT, and other techniques of work hardening of surface layers, the impact force and the strike density in UIT can be precisely controlled that allows more effective treatment of a specimen. Moreover, ultrasonic impact treatment is an inexpensive technique that does not require complex equipment and provides capability to treat hard-to-reach areas and complex parts.

Generally, the nature of morphological changes taking place in the materials during the UIT processing is determined not only by the temperature–rate parameters, but also by their microstructures, phase compositions, the presence of carbide-forming elements, possible polymorphic transformations under severe plastic strains, etc. There is no doubt that explicit identifying the mechanisms of structural and phase transformations during repeated penetrations of a striker into the treated specimen is made possible by computer simulations. In this Special Issue, we welcome articles that focus on the experimental observations, a molecular dynamics simulation and ab initio calculation mechanisms underlying the development of structural and phase transformations in loaded titanium alloys which made it possible to explain the UIT effect on their microstructure, mechanical properties, as well as deformation and fracture behavior under different external actions.

Prof. Dr. Alexey Panin
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.

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 2000 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.


  • titanium alloys
  • ultrasonic impact treatment
  • microstructure
  • phase transformation
  • surface hardening
  • deformation
  • mechanical properties

Published Papers

This special issue is now open for submission.
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