Microstructure Properties and Characterization of Metallic Material

A special issue of Processes (ISSN 2227-9717). This special issue belongs to the section "Materials Processes".

Deadline for manuscript submissions: 30 June 2025 | Viewed by 1067

Special Issue Editors


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Guest Editor
Facultad de Ingeniería, Universidad del Magdalena, Santa Marta 470004, Colombia
Interests: innovative materials; advanced microstructural characterization techniques

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Guest Editor
Grupo de Nuevos Materiales, Facultad de Ingeniería, Universidad del Magdalena, Santa Marta 470004, Colombia
Interests: crystal structures; magnetic properties; advanced materials

Special Issue Information

Dear Colleagues,

The microstructure of metallic materials is fundamental in determining their mechanical, physical, and chemical properties, which are critical to the performance and durability of these materials in demanding applications. Recent advancements in alloy design, processing methods, and surface engineering have paved the way for significant improvements in metallic materials’ microstructural properties. Understanding how heat treatment, phase transformations, and defect evolution influence the microstructure of metallic alloys has become increasingly important in optimizing their performance for industries like aerospace, automotive, energy, and biomedical engineering.

This Special Issue on “Microstructure Properties and Characterization of Metallic Material” invites high-quality research contributions focusing on the relationship between microstructural features and the resulting properties of metallic materials. Topics include the development of novel alloys, advanced characterization techniques, and studies on how processing techniques such as casting, additive manufacturing, and thermomechanical treatments affect microstructure. We are particularly interested in research that explores microstructure evolution under extreme operational conditions, such as high temperatures, stresses, or corrosive environments. This Special Issue aims to advance the understanding of how to control and manipulate the microstructure of metallic materials to enhance their mechanical properties and reliability in various industrial applications.

Dr. Edwan Anderson Ariza Echeverri
Dr. Crispulo Enrique Deluque Toro
Guest Editors

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Keywords

  • microstructure evolution
  • alloy design
  • mechanical properties
  • phase transformations
  • heat treatment
  • surface engineering
  • microstructural characterization
  • advanced materials
  • modelling
  • simulation

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Published Papers (1 paper)

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Research

26 pages, 8761 KiB  
Article
Superior Resistance and Ductility Through Novel Quench- and Partitioning-Path in Complex Refined Microstructure
by Mohammad Masoumi, Crispulo E. Deluque-Toro and Edwan Anderson Ariza-Echeverri
Processes 2025, 13(2), 411; https://doi.org/10.3390/pr13020411 - 4 Feb 2025
Viewed by 602
Abstract
A well-designed complex microstructure containing both soft and hard micro-constituents can enhance the mechanical properties of steel. In this study, commercial AISI 9254 steel was annealed at 900 °C, rapidly cooled to 550 °C for 500 s to promote approximately 50% fine pearlitic [...] Read more.
A well-designed complex microstructure containing both soft and hard micro-constituents can enhance the mechanical properties of steel. In this study, commercial AISI 9254 steel was annealed at 900 °C, rapidly cooled to 550 °C for 500 s to promote approximately 50% fine pearlitic transformation, quenched to 125 °C for partial martensitic transformation, and finally heated to 375 °C for 1800 s to complete the partitioning stage in a novel quench and partitioning (Q&P) process. Tensile testing revealed a yield strength (YS) of ≈1500 MPa, an ultimate tensile strength (UTS) of ≈1570 MPa, and a total elongation of ≈13.85%. This high yield strength indicates the ability of the material to support the development of lightweight, yet high-strength components for demanding applications. Additionally, the balanced total elongation helps mitigate the risk of brittle failure, enhancing fracture toughness and reducing the likelihood of premature failures in critical structural applications. These results indicate an increase of approximately 8.3% in strength and 34.5% in ductility compared to the as-received 9254 steel. X-ray analysis revealed that the complex microstructure had fewer crystallographic defect densities than the as-received sample. Secondary electron images showed ultrafine martensite laths and cementite lamellae within the body-centered cubic (BCC) matrix, with some proeutectoid ferrite found at prior austenite grains. Electron backscattered diffraction (EBSD) analysis estimated low internal distortion in martensite laths, with average crystal defect densities around 2.25 × 1014 m−2. The BCC matrix contained ferrite and martensite, with carbide particles and a small amount of retained austenite detected by transmission electron microscopy (TEM). These findings confirm the enhanced mechanical properties of commercial 9254 steel through the novel Q&P processing. Full article
(This article belongs to the Special Issue Microstructure Properties and Characterization of Metallic Material)
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