Special Issue "Microstructure and Mechanical Properties of Casting Alloys"

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

Deadline for manuscript submissions: 31 March 2018

Special Issue Editor

Guest Editor
Prof. Annalisa Pola

Department of Mechanical and Industrial Engineering, University of Brescia, via Branze 38, 25123 Brescia (Italy)
Website | E-Mail
Interests: microstructural characterization; nonferrous alloys (Al, Zn, Ti, etc.); wear, cavitation and corrosion resistance; numerical simulation of foundry processes; rheology of metals and alloys; processing of foundry alloys; semisolid processing; spray quenching processing and simulation

Special Issue Information

Dear Colleagues,

As is well-known, foundry processes allow the obtaining of complex near net shape parts, characterized by high performance and good appearance. The properties of castings depend on different factors, as the alloy type, the use of corrective elements, the treatment of the liquid metal, the design of the mould, the process parameters, as well as heat treatment and finishing operations. Each one affects the microstructure of the component and, therefore, the final in-service properties.

The aims of this Special Issue are to present recent research and developments on casting alloys, molten metal and post processing treatments, characterization methods, and prediction models, with a particular focus on the correlation between microstructure and performance.

Hence, the different aspects related to the advances in the design, characterization and evaluation of the properties of casting alloys, based on experimental, analytical and computer simulation methods are welcomed in this Special Issue.

Prof. Annalisa Pola
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 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. 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.

Keywords

Ferrous casting alloys

Nonferrous casting alloys

Solidification

Microstructure

Defects

Mechanical properties

Simulation and modelling

Published Papers (2 papers)

View options order results:
result details:
Displaying articles 1-2
Export citation of selected articles as:

Research

Open AccessArticle Modeling and Simulation of the Gray-to-White Transition during Solidification of a Hypereutectic Gray Cast Iron: Application to a Stub-to-Carbon Connection Used in Smelting Processes
Metals 2017, 7(12), 549; doi:10.3390/met7120549
Received: 22 September 2017 / Revised: 25 November 2017 / Accepted: 1 December 2017 / Published: 7 December 2017
PDF Full-text (5447 KB) | HTML Full-text | XML Full-text
Abstract
This work reports on experimental and numerical results of the gray-to-white transition (GWT) during solidification of a hypereutectic gray cast iron (GCI) in a casting test using a stub-to-carbon (STC) connection assembly. Since in this process non-uniform cooling rates are produced, the mechanical
[...] Read more.
This work reports on experimental and numerical results of the gray-to-white transition (GWT) during solidification of a hypereutectic gray cast iron (GCI) in a casting test using a stub-to-carbon (STC) connection assembly. Since in this process non-uniform cooling rates are produced, the mechanical properties are expected to spatially vary due to the development of different microstructures along the thimble. The twin aims of this work were to (1) experimentally validate the GWT prediction capabilities of the microstructural model proposed earlier by the authors in the rodding process of a hypereutectic GCI-STC, and (2) estimate, from the numerically obtained microstructure and ultimate tensile strength (UTS), the local hardness of the alloy after the numerical predictions of the microstructure were experimentally validated. To this end, the final microstructure at different points of the thimble and the hardness profile along its radial direction were measured for validation purposes. Moreover, this rodding process was simulated using an extension of a thermal microstructural model previously developed by the authors and the GWT was superimposed on that simulation. The computed results encompass cooling curves, the evolution of gray and white fractions, eutectic radii and densities and, in addition, the hardness profile. A detailed discussion of the experimental and numerical results is presented. Finally, the computed GWT was found to adequately reproduce the experimental data. Full article
(This article belongs to the Special Issue Microstructure and Mechanical Properties of Casting Alloys)
Figures

Figure 1

Open AccessArticle Secondary Solidification Behavior of A356 Aluminum Alloy Prepared by the Self-Inoculation Method
Metals 2017, 7(7), 233; doi:10.3390/met7070233
Received: 25 May 2017 / Revised: 17 June 2017 / Accepted: 19 June 2017 / Published: 26 June 2017
PDF Full-text (12318 KB) | HTML Full-text | XML Full-text
Abstract
Semisolid slurry of A356 aluminum alloy was prepared by Self-Inoculation Method, and the secondary solidification behavior during rheo-diecasting forming process was researched. The results indicate that the component with non-dendritic and uniformly distributed microstructures can be produced by Rheo-Diecasting (RDC) process (combining Self-inoculation
[...] Read more.
Semisolid slurry of A356 aluminum alloy was prepared by Self-Inoculation Method, and the secondary solidification behavior during rheo-diecasting forming process was researched. The results indicate that the component with non-dendritic and uniformly distributed microstructures can be produced by Rheo-Diecasting (RDC) process (combining Self-inoculation Method (SIM) with High Pressure Die Casting (HPDC)). The isothermal holding time of the slurry has large effect on primary particles, but has little effect on secondary particles. Growth rate of the primary particles in the isothermal holding process conforms to the dynamic equation of Dt3 − D03 = Kt. The suitable holding time for rheo-diecasting of A356 aluminum alloy is 3 min. During filling process, the nucleation occurs throughout the entire remaining liquid, and nuclei grow stably into globular particles with the limited grain size of 6.5μm firstly, then both α1 and α2 particles appear unstable growth phenomenon due to the existence of constitutional undercooling. The average particle sizes and shape factors of both α1 and α2 are decreasing with the increase of filling distance due to different cooling rate in different positions. The growth rate of the eutectic in RDC is 4 times faster than HPDC, which is mainly due to the limitation of α2 particles in RDC process. The average eutectic spacings are decreasing with the increase of filling distance. Full article
(This article belongs to the Special Issue Microstructure and Mechanical Properties of Casting Alloys)
Figures

Back to Top