Heat Treatment, Microstructures, and Mechanical Properties of Metallic Materials

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: 30 November 2024 | Viewed by 2201

Special Issue Editors


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Guest Editor
Faculty of Metal Materials Department, School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu 610031, China
Interests: metal heat treatment; surface modification; powder modification; sintering; phase transformation; green manufacturing and remanufacturing

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Guest Editor
Faculty of Metal Materials Department, School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu 610031, China
Interests: metal heat treatment; surface modification; computational materials science
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Special Issue Information

Dear Colleagues,

Heat treatment is the foundation of modern manufacturing; it improves the properties of metal materials by changing their microstructure. Almost all important mechanical components require heat treatment to improve their performance and enhance their service safety. Advancements in heat treatment equipment and technology have greatly promoted the development of advanced metal materials, laying the foundation for the upgrading and development of future manufacturing industries. The scope of this Special Issue includes the following: progress in heat treatment, the relationship between heat treatment processes, microstructures and their properties, the heat treatment of new materials, the application of heat treatment in advanced metal preparation, and the relationship between heat treatment and the environment. Heat treatment is the soul of mechanical components, providing infinite possibilities for improving and optimizing the performance of metal materials. We aim to provide a platform where researchers can learn about the research and development of heat treatment and create space for the performance and quality improvement of advanced equipment in the future.

In this Special Issue, we welcome articles that focus on discussing the relationship between advanced heat treatment processes, microstructures, and their properties. Technology enabling green, intelligent, and low-cost heat treatment processes is particularly interesting and has the potential for implementation in advanced metal manufacturing and performance improvement. We look forward to receiving your contributions.

Dr. Guodong Cui
Dr. Chengsong Zhang
Guest Editors

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Keywords

  • heat treatment
  • microstructure
  • mechanical properties
  • characterization
  • mechanical components
  • green manufacturing

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Published Papers (2 papers)

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Research

14 pages, 12307 KiB  
Article
Phase Transformations after Heat Treating an As-Cast Fe-30Mn-8.8Al-0.3Si-0.15C Steel
by Victor M. Lopez-Hirata, Eduardo Perez-Badillo, Maribel Leticia Saucedo-Muñoz, Felipe Hernandez-Santiago and Jose David Villegas-Cardenas
Metals 2024, 14(7), 748; https://doi.org/10.3390/met14070748 - 25 Jun 2024
Viewed by 1089
Abstract
The phase transformations in an as-cast Fe-30Mn-8.8Al-0.3Si-0.15C steel were analyzed experimentally and numerically with a Calphad-based method during heat treatment. The nonequilibrium phases were determined using the Thermo-Calc Scheil module and the equilibrium phases with Themo-Calc based on the steel chemical composition. The [...] Read more.
The phase transformations in an as-cast Fe-30Mn-8.8Al-0.3Si-0.15C steel were analyzed experimentally and numerically with a Calphad-based method during heat treatment. The nonequilibrium phases were determined using the Thermo-Calc Scheil module and the equilibrium phases with Themo-Calc based on the steel chemical composition. The precipitated phases were analyzed with TC-PRISMA using the chemical composition, nucleation site, and temperature among other factors. An ingot of this chemical composition was vacuum-melted using pure elements under an Ar gas atmosphere. As-cast steel specimens were annealed and solution-treated, quenched, and then aged at different temperatures. Heat-treated specimens were analyzed by different techniques. The results indicated that the microconstituents are the α and γ phases for the as-cast, homogenized, and quenched conditions. The main difference among these conditions is the distribution and size of the γ phase, which produced a change in hardness from 209 to 259 VHN. In contrast, the aging treatment at 750 °C caused a decrease in hardness from 492 to 306 VHN, which is attributable to the increase in volume fraction of the γ phase. On the other hand, the aging treatment at 550 °C promoted precipitation hardening from 259 to 649 VHN because of the κ precipitate formation. The calculated results for the different heat treatments with the Calphad-based method agreed well with the experimental ones. In addition, the intragranular precipitation of the κ phase could be simulated using the nucleation and growth and coarsening mechanisms based on a Calphad method. Full article
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15 pages, 6616 KiB  
Article
Temperature Dependency of Modified Mohr–Coulomb Criterion Parameters for Advanced High Strength Dual-Phase Steel DP780
by Yukuan Li, Di Li, Hui Song, Yiqun Wang and Dongze Wu
Metals 2024, 14(6), 721; https://doi.org/10.3390/met14060721 - 17 Jun 2024
Viewed by 777
Abstract
The Modified Mohr–Coulomb criterion has been demonstrated to exhibit high accuracy in the prediction of fracture in high-strength steels. Taking DP780 as the research object, the undetermined parameters of the Modified Mohr–Coulomb criterion at different temperatures were calibrated by tensile and shear tests [...] Read more.
The Modified Mohr–Coulomb criterion has been demonstrated to exhibit high accuracy in the prediction of fracture in high-strength steels. Taking DP780 as the research object, the undetermined parameters of the Modified Mohr–Coulomb criterion at different temperatures were calibrated by tensile and shear tests combined with simulation. The relationships between the parameters and temperature were investigated. Finally, the relationship between criterion parameters and temperature was verified using the stretch-bending tests of U-shape parts. The fracture of automotive parts can be accurately predicted by simulation during warm stamping, thereby guiding actual production. Full article
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