Special Issue "Recent Developments in Non-Conventional Welding of Materials"

A special issue of Materials (ISSN 1996-1944).

Deadline for manuscript submissions: 15 March 2020.

Special Issue Editors

Guest Editor
Prof. Dr. Rui Manuel Leal Website E-Mail
ESAD.CR, Polytechnic Institute of Leiria, Rua Isidoro Inácio Alves de Carvalho, 2500-321 Caldas da Rainha, Portugal
CEMMPRE, Department of Mechanical Engineering, University of Coimbra, Rua Luís Reis Santos, 3030-788 Coimbra, Portugal
Interests: Welding technology; Processing technology; Microstructural and mechanical characterization; Friction stir welding; Explosion welding.
Guest Editor
Prof. Dr. Ivan Galvão Website E-Mail
ISEL, Department of Mechanical Engineering, Polytechnic Institute of Lisbon, Rua Conselheiro Emídio Navarro, 1959-007 Lisboa, Portugal
CEMMPRE, Department of Mechanical Engineering, University of Coimbra, Rua Luís Reis Santos, 3030-788 Coimbra, Portugal
Interests: Solid-state welding; Friction stir welding; Explosion welding; Dissimilar materials welding; Solid-state processing

Special Issue Information

Dear Colleagues,

Welding is one of the technological fields with the greatest impact in many industries, such as automotive, aerospace, energy production, electronics, the health sector, etc. Welding technologies are currently used to join the most diverse materials, from metallic alloys to polymers, composites, or even biological tissues. Despite the relevance and wide application of traditional welding technologies, these processes do not meet the demanding requirements of some industries. This has driven strong research efforts in non-conventional welding processes, such as laser welding, ultrasonic welding, impact welding, friction stir welding, diffusion welding, and many other welding technologies. Important studies have been recently developed all over the world on the application of these processes to the joining of cutting-edge materials and material combinations, enabling the production of joints with improved properties. Thus, this Special Issue will present the most recent developments in the non-conventional welding of materials. Experimental and numerical modelling/simulation research on all aspects related to this multidisciplinary subject are welcome. Original research and review papers addressing innovative developments in non-conventional welding processes and process applications are valuable scientific contributions.

We look forward to receiving your contributions to this issue.

Prof. Dr. Rui Manuel Leal
Prof. Dr. Ivan Galvão
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 papers will be 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. 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 1800 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

  • Non-conventional welding
  • Laser welding
  • Ultrasonic welding
  • Impact welding
  • Friction stir welding
  • Diffusion welding
  • Experimental
  • Numerical modelling/simulation
  • Materials
  • Properties

Published Papers (2 papers)

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Research

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Open AccessArticle
Investigation on Effect of Strain Rate and Heat Generation on Traverse Force in FSW of Dissimilar Aerospace Grade Aluminium Alloys
Materials 2019, 12(10), 1641; https://doi.org/10.3390/ma12101641 - 20 May 2019
Abstract
The emergence of the aerospace sector requires efficient joining of aerospace grade aluminium alloys. For large-scale industrial practices, achievement of optimum friction stir welding (FSW) parameters is chiefly aimed at obtaining maximum strain rate in deforming material with least application of traverse force [...] Read more.
The emergence of the aerospace sector requires efficient joining of aerospace grade aluminium alloys. For large-scale industrial practices, achievement of optimum friction stir welding (FSW) parameters is chiefly aimed at obtaining maximum strain rate in deforming material with least application of traverse force on the tool pin. Exact computation of strain rate is not possible due to complex and unexposed material flow kinematics. Estimation using micro-structural evolution serves as one of the very few methods applicable to analyze the yet unmapped interdependence of strain rate and traverse force. Therefore, the present work assessed strain rate in the stir zone using Zener Holloman parameter. The maximum and minimum strain rates of 6.95 and 0.31 s−1 were obtained for highest and least traverse force, respectively. Full article
(This article belongs to the Special Issue Recent Developments in Non-Conventional Welding of Materials)
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Review

Jump to: Research

Open AccessFeature PaperReview
Manufacture and Performance of Welds in Creep Strength Enhanced Ferritic Steels
Materials 2019, 12(14), 2257; https://doi.org/10.3390/ma12142257 - 13 Jul 2019
Abstract
Welding is a vital process required in the fabrication of ‘fracture critical’ components which operate under creep conditions. However, often the procedures used are based on ‘least initial cost’. Thus, it is not surprising that in many high energy applications, welds are the [...] Read more.
Welding is a vital process required in the fabrication of ‘fracture critical’ components which operate under creep conditions. However, often the procedures used are based on ‘least initial cost’. Thus, it is not surprising that in many high energy applications, welds are the weakest link, i.e., damage is first found at welds. In the worst case, weld cracks reported have had catastrophic consequences. Comprehensive Electric Power Research Institute (EPRI) research has identified and quantified the factors affecting the high temperature performance of advanced steels working under creep conditions. This knowledge has then been used to underpin recommendations for improved fabrication and control of creep strength enhanced ferritic steel components. This review paper reports background from this work. The main body of the review summarizes the evidence used to establish a ‘well engineered’ practice for the manufacture of welds in tempered martensitic steels. Many of these alternative methods can be applied in repair applications without the need for post-weld heat treatment. This seminal work thus offers major benefits to all stakeholders in the global energy sector. Full article
(This article belongs to the Special Issue Recent Developments in Non-Conventional Welding of Materials)
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Planned Papers

The below list represents only planned manuscripts. Some of these manuscripts have not been received by the Editorial Office yet. Papers submitted to MDPI journals are subject to peer-review.

1. Title: The effect of post-weld hot-rolling on the microstructure of explosively welded Mg/Al/Ti multilayer composite

Authors: Marcin Wachowski 1,*, Robert Kosturek 1, Lucjan Śnieżek 1, Sebastian Mróz 2

Affiliation:

1   Military University of Technology, Faculty of Mechanical Engineering, 2 gen. W. Urbanowicza str., 00-908 Warsaw, Poland

2   Czestochowa University of Technology, Faculty of Production Engineering and Materials Technology, 19

Abstract: The paper describes an investigation of explosively welded Mg/Al/Ti multilayer composite. Following the welding, composite was hot-rolled at temperature 400°C with a total relative strain of 30%. The strain rate was 1.0 [1/s]. The composite Mg/Al and Al/Ti bonds were subjected to microstructure analysis using scanning electron (SEM) and transmission electron microscopy (TEM). It has been found that no formation of intermetallic phases was observed in as-welded joints. Applying of hot-rolling process results in formation of a continuous layer in Mg/Al joint consisting of two intermetallic phases Mg2Al3 (ꞵ) and Mg17Al12 (γ). In Al/Ti joint applying of hot-rolling results in formation of a continuous melted layer with locally identified precipitations of the intermetallic phase TiAl3.

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