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Advanced Welding in Alloys and Composites, Second Edition
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Advanced Welding in Alloys and Composites, Second Edition

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

Deadline for manuscript submissions: 20 February 2026 | Viewed by 506

Special Issue Editors

Dr. Yang Li

E-Mail Website
Guest Editor
School of Materials Science and Engineering, Tianjin University, Tianjin 300354, China
Interests: carbon-fiber-reinforced composites; ultrasonic welding; ultrasonic additive manufacturing; resistance welding dissimilar materials joining; lightweight materials joining
Special Issues, Collections and Topics in MDPI journals
Dr. Sansan Ao

E-Mail Website
Guest Editor
School of Materials Science and Engineering, Tianjin University, Tianjin 300354, China
Interests: NiTi SMAs ultrasonic spot welding (USW), NiTi SMAs wire and arc additive manufacturing (WAAM); NiTi/SS wire dissimilar materials joining; NiTi electrolytic machining (ECM)
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

This Second Edition is a continuation of the Special Issue on "Advanced Welding in Alloys and Composites", which addresses cutting-edge welding technologies in the realm of alloys and composites. The aim of this Special Issue is to broaden the knowledge regarding recent scientific developments in various aspects of welding technologies for alloys and composites.

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

  1. Welding processes: friction-based welding, high-energy density welding, hybrid welding, dissimilar materials welding, and welding in extreme conditions, etc;
  2. Welding materials: advanced high-strength steels, high-temperature alloys, high-entropy alloys, shape memory alloys, light alloys, and polymer and metal matrix composites, etc;
  3. Joining mechanism: modeling and simulation are encouraged to understand the physics and/or chemistry of advanced welding technologies for alloys and composites;
  4. Microstructure and properties: the characterization and evaluation of welded joints in terms of microstructure and their mechanical, thermal, and corrosion properties.

We look forward to receiving your contributions.

Dr. Yang Li
Dr. Sansan Ao
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 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-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 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

  • advanced welding technologies
  • metals
  • polymers
  • composites
  • modelling and simulation
  • microstructure and properties

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Published Papers (1 paper)

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Research

15 pages, 4179 KB  
Article
Effect of Ta Content on the Microstructure and Properties of NiTiTa Functional Coatings In Situ Synthesized by Directed Energy Deposition
by Sansan Ao, Yawei Xing, Shaozhu Liu, Xinde Zuo and Yang Li
Materials 2025, 18(22), 5255; https://doi.org/10.3390/ma18225255 - 20 Nov 2025
Viewed by 341
Abstract
In this study, surface alloying technology based on Gas Tungsten Arc Welding (GTAW) was used to synthesize in situ NiTiTa coatings on a NiTi substrate using commercially pure Ta foils. The influence of different Ta contents (0.91, 1.42, and 2.91 at.%) on the [...] Read more.
In this study, surface alloying technology based on Gas Tungsten Arc Welding (GTAW) was used to synthesize in situ NiTiTa coatings on a NiTi substrate using commercially pure Ta foils. The influence of different Ta contents (0.91, 1.42, and 2.91 at.%) on the microstructure, phase formation, hardness, corrosion resistance, and X-ray visibility of the prepared coatings were systematically studied. These results show that the NiTiTa coatings fabricated by GTAW were free of microcracks with good surface quality and superior adhesion to the NiTi substrate. The NiTiTa coatings are mainly composed of columnar austenitic NiTi (B2), and martensitic NiTi (B19’) with (Ti, Ta)2Ni precipitating at the grain boundaries. The proportion of B19’ martensite and the Ta content dissolved in the NiTi matrix increases with the increasing addition of Ta. In addition, β-Ta appeared in the coating formed with 1.42 at.% Ta and precipitated abundantly when the Ta amount was increased to 2.91 at.%. Changes in phase composition and secondary phases lead to a decrease in the material nanohardness. To simulate the body fluid environment, corrosion tests were conducted in Hank’s solution at a rate of 0.5 mV/s. Electrochemical tests show that the NiTiTa coatings exhibit superior corrosion resistance, where the corrosion potential, Ecorr, increased with increasing Ta content. The enhanced X-ray visibility of the newly formed coatings was also revealed. This work provides a cost-effective method for in situ synthesis of NiTiTa coatings on NiTi alloys, highlighting its potential for improving the corrosion resistance and X-ray visibility of NiTi shape memory alloys. Full article
(This article belongs to the Special Issue Advanced Welding in Alloys and Composites, Second Edition)
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