Special Issue "Semi-solid Processing of Alloys and Composites"

A special issue of Metals (ISSN 2075-4701).

Deadline for manuscript submissions: 28 February 2018

Special Issue Editors

Guest Editor
Dr. Shahrooz Nafisi

Department of Chemical and Materials Engineering, University of Alberta, Edmonton, AB T6G 2M7, Canada
Website | E-Mail
Interests: metallurgy of aluminum and steel alloys; material characterization; alloy development; testing methodologies; solidification and casting; additive manufacturing
Guest Editor
Assoc. Prof. Reza Ghomashchi

School of Mechanical Engineering, University Adelaide, Adelaide, SA 5005, Australia
Website | E-Mail
Interests: solidification and casting; powder metallurgy; additive manufacturing; energy converting materials; metallurgy of aluminum and steel alloys; advanced composites

Special Issue Information

Dear Colleagues,

Semi-Solid Metal (SSM) processing, as a viable manufacturing route to those of conventional casting and forging, has not yet been fully exploited despite nearly half a century since its introduction to metal industry. The slow pace of adopting SSM routes may be due to various reasons, including capital costs, profit margins, and, most importantly, the lack of detailed analysis of various SSM processes in open literature to confidently establish their advantages over more conventional routes. Therefore, it becomes necessary for SSM community to disseminate their findings more effectively to generate greater confidence in SSM processes in the eyes of our industrial leaders. This why we have embarked on this task to invite the leaders in SSM research to share their findings in a Special Issue dedicated to semi-solid processing of metals and composites.

Semi-Solid Metal (SSM) processing takes advantage of both forming and shaping characteristics usually employed for liquid and solid materials. In the absence of shear forces, the semi-solid metal has similar characteristics to solids, i.e., easily transferred and shaped, while by applying a defined force, the viscosity is reduced and the material flows like a liquid. Such unique characteristics have made SSM routes attractive alternatives to conventional casting on an industrial scale.

With the intention of taking full advantage of SSM characteristics, it is crucial to understand the SSM processing including topics such as solidification and structural evolution, flow behavior through modeling and rheology, new processes and process control, alloy development and properties in general.

This Special Issue is focused on the recent research and findings in the field with the aim of filling the gap between industry and academia, and also to shed light on some of the fundamentals of science and technology of semi-solid processing.

Topics include but not limited to;

  • Processing
  • Materials development and basics of alloy design
  • Solidification and structural evolution
  • Micro/Macro structural characterization
  • Modeling and simulation
  • Rheology
  • Properties of semi-solid alloys
  • Industrial application

Dr. Shahrooz Nafisi
Prof. Reza Ghomashchi
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. 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 1000 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.


  • Rheo-route
  • Thixo-route
  • Semi-solid
  • Rheology
  • Modeling
  • Characterization
  • Viscosity
  • Solidification
  • Fluidity

Published Papers (1 paper)

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Open AccessFeature PaperArticle An Experimental Evaluation of Electron Beam Welded Thixoformed 7075 Aluminum Alloy Plate Material
Metals 2017, 7(12), 569; doi:10.3390/met7120569
Received: 8 November 2017 / Revised: 12 December 2017 / Accepted: 13 December 2017 / Published: 15 December 2017
PDF Full-text (37777 KB) | HTML Full-text | XML Full-text
Two plates of thixoformed 7075 aluminum alloy were joined using Electron Beam Welding (EBW). A post-welding-heat treatment (PWHT) was performed within the semi-solid temperature range of this alloy at three temperatures, 610, 617 and 628 °C, for 3 min. The microstructural evolution and
[...] Read more.
Two plates of thixoformed 7075 aluminum alloy were joined using Electron Beam Welding (EBW). A post-welding-heat treatment (PWHT) was performed within the semi-solid temperature range of this alloy at three temperatures, 610, 617 and 628 °C, for 3 min. The microstructural evolution and mechanical properties of EB welded plates, as well as the heat-treated specimens, were investigated in the Base Metal (BM), Heat Affected Zone (HAZ), and Fusion Zone (FZ), using optical microscopy, Scanning Electron Microscopy (SEM), EDX (Energy Dispersive X-ray Analysis), and Vickers hardness test. Results indicated that after EBW, the grain size substantially decreased from 67 µm in both BM and HAZ to 7 µm in the FZ, and a hardness increment was observed in the FZ as compared to the BM and HAZ. Furthermore, the PWHT led to grain coarsening throughout the material, along with a further increase in hardness in the FZ. Full article
(This article belongs to the Special Issue Semi-solid Processing of Alloys and Composites)

Figure 1

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. Study of Semi-Solid Magnesium Alloys (with RE Elements) as a Non-Newtonian Fluid Descripted by Rheological Models

Marta Ślęzak

AGH University of Science and Technology
Faculty of Metals Engineering and Industrial Computer Science

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