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Metals
Special Issues
Thermodynamics and Phase Transformation Kinetics Analysis of Alloy System
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Thermodynamics and Phase Transformation Kinetics Analysis of Alloy System

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: closed (30 November 2023) | Viewed by 3664

Special Issue Editors

Dr. Ze'An Tian

E-Mail Website
Guest Editor
College of Computer Science and Electronic Engineering, Hunan University, Changsha, China
Interests: structural analysis of disordered or ordered systems; molecular dynamics simulation; first-principles calculation; metallic glasses; phase transition; rapid cooling of metallic liquids
Dr. Lili Zhou

E-Mail Website
Guest Editor
School of Medical and Information Engineering, Gannan Medical University, Ganzhou, China
Interests: molecular dynamics simulation; metallic glasses; structure and mechanical property relationship; crystallization mechanism of liquid metals
Dr. Wanqiang Xu

E-Mail Website
Guest Editor
School of Materials Science and Engineering, University of New South Wales, Kensington, Australia
Interests: solidification of metals and alloys; solid phase transformation; evolutions of microstructure and texture during thermomechanical processing of metals and alloys
Dr. Kejun Dong

E-Mail Website
Guest Editor
Centre for Infrastructure Engineering, School of Engineering, Western Sydney University, Locked Bag 1797, Penrith, NSW 2751, Australia
Interests: discrete element method; granular materials; particle packing; particle flow; multiphase flow; physical separation
Dr. Jiabao Yi

E-Mail Website
Guest Editor
Global Innovative Centre for Advanced Nanomaterials, School of Engineering, The University of Newcastle, Newcastle, NSW 2308, Australia
Interests: functional materials; compound semiconductors; materials engineering not elsewhere classified
Quan Zheng

E-Mail
Guest Editor Assistant
College of Big Data and Information Engineering, Guizhou University, Guiyang, China
Interests: germanium; sige; nanocrystal

Special Issue Information

Dear Colleagues,

Alloys have superior properties, a wide range of applications, and meet the needs of high-tech development. Thus, they have become an attractive research topic. Phase transformation as a kinetic process taking place under certain thermodynamic conditions, such as the creation of liquid and solid alloys under varying conditions of high pressure, and low or high temperature, is a very active research field.  Much important progress has been made in recent decades, thanks to the development of experimental techniques and computer simulations. These achievements have affected various fields, ranging from phase transformation theory, solid-state physics and chemistry to materials science. They have not only deepened our knowledge on liquid-solid, solid-solid and solid-liquid phase transitions, but have also provided a better understanding of the melting of alloys. Thermodynamics, phase transformation kinetics and structural evolution during phase transformation are crucial for understanding the structural properties of materials.

This Special Issue on thermodynamics and the phase transformation kinetics analysis of alloys aims to provide a forum for describing and discussing contemporary achievements. Our goal is to give special emphasis to phase transformation, focusing on thermodynamics and kinetics analysis, as well as their effects on physical properties. However, other topics (for example, structure evolution during the phase transformation of amorphous alloys and high-entropy alloys) are not excluded. Authors are invited to contribute to the Special Issue with articles presenting new experimental and theoretical advances. Contributions discussing the relationships between the phase transformation of alloys, the mechanism of these transformations, and their influence on physical and chemical properties are welcome.

Original articles and critical reviews from a wide range of disciplines are encouraged for submission to this Special Issue. The topics summarized under the keywords given below are only broad examples of the great number of topics this Special Issue has potential to encompass.

Prof. Dr. Ze'an Tian
Dr. Lili Zhou
Dr. Wanqiang Xu
Dr. Kejun Dong
Dr. Jiabao Yi
Guest Editors

Quan Zheng
Guest Editor Assistant

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 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

  • alloy materials
  • microstructure
  • thermodynamics
  • structure evolution
  • structure characterization
  • phase transformation kinetics
  • phase transformation theory
  • material fabrication and processing

Published Papers (2 papers)

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17 pages, 7866 KiB  
Article
Thermodynamic Description of the Au-Sb-Sn Ternary System
by Jing Ge, Qingsong Tong, Maohua Rong, Hongjian Ye, Yuchen Bai and Jiang Wang
Metals 2023, 13(6), 1082; https://doi.org/10.3390/met13061082 - 7 Jun 2023
Cited by 1 | Viewed by 1800
Abstract
Phase equilibria and thermodynamic properties of the Au-Sb-Sn ternary system are important for the design of Au-based alloys as high-temperature lead-free solders to replace high-Pb solders. In this work, phase transition temperatures of five Sb-Sn alloys were measured using differential thermal analysis (DTA), [...] Read more.
Phase equilibria and thermodynamic properties of the Au-Sb-Sn ternary system are important for the design of Au-based alloys as high-temperature lead-free solders to replace high-Pb solders. In this work, phase transition temperatures of five Sb-Sn alloys were measured using differential thermal analysis (DTA), and the temperatures of three invariant reactions were determined. Based on the measured experimental results in this work and the reported results, the Sb-Sn binary system was re-optimized using the CALPHAD method. The calculated results were in good agreement with available phase equilibria and thermodynamic data. This work was further combined with the previous assessments of the Au-Sn and Au-Sb binary systems and the present optimization of the Sb-Sn binary system to calculate the phase equilibria and thermodynamic properties of the Au-Sb-Sn ternary system, according to the reported experimental results, including thermodynamic properties and phase equilibria. The calculated liquidus projection, isothermal sections, vertical sections, as well as enthalpy of mixing and activity of Sn in liquid alloys are consistent well with the reported experimental results. A self-consistent set of thermodynamic parameters was obtained to accurately describe Gibbs energies of various phases in the Au-Sb-Sn ternary system, which would serve as a sound basis for developing a thermodynamic database of multicomponent Au-Sn-based alloy systems. Full article
(This article belongs to the Special Issue Thermodynamics and Phase Transformation Kinetics Analysis of Alloy System)
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14 pages, 17129 KiB  
Article
Mechanism of Aluminum Element Segregation in As-Cast Medium-Entropy Alloy CrCoNiAl0.014: A Hybrid MD/MC Simulation and Experimental Study
by Baoshuai Xue, Zhongxue Feng, Jinliang Chen, Chao Zhang, Tongman Li, Jun Tan, Caiju Li and Jianhong Yi
Metals 2023, 13(2), 331; https://doi.org/10.3390/met13020331 - 6 Feb 2023
Cited by 1 | Viewed by 1424
Abstract
Element segregation in the as-cast medium-entropy alloy (MEA), CrCoNiAl0.014, has a significant influence on its mechanical properties. This study focused on aluminum segregation in the as-cast CrCoNiAl0.014 MEA at room temperature (300 K). The element distribution, morphology, and type of [...] Read more.
Element segregation in the as-cast medium-entropy alloy (MEA), CrCoNiAl0.014, has a significant influence on its mechanical properties. This study focused on aluminum segregation in the as-cast CrCoNiAl0.014 MEA at room temperature (300 K). The element distribution, morphology, and type of precipitates formed by the elemental segregation were identified by optical microscopy, X-ray diffraction, electron probe microanalysis, and transmission electron microscopy. Al segregation existed at the dendritic boundary in the face-centered cubic (FCC) MEA matrix. Hybrid molecular dynamics and Monte Carlo simulations were conducted to analyze the diffusion behavior and the chemical affinity of Al, as well as understand the segregation mechanism of Al at the atomic scale. Al displayed a faster diffusion speed and a higher chemical affinity than Ni, Cr, and Co at the same temperature. Al segregated at the dendritic boundary to form the Al-rich phase. Furthermore, as the temperature was increased, the atomic thermal vibration of these four elements became more intensive, and Al segregation was more serious. However, Al segregation improved the uniform diffusion of Cr, Co, and Ni. Therefore, this study provides a reference for subsequent reductions in element segregation and improvements in the mechanical properties of MEA. Full article
(This article belongs to the Special Issue Thermodynamics and Phase Transformation Kinetics Analysis of Alloy System)
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