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Metals
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Advances in Metal Materials: Structure, Properties and Heat Treatment
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Advances in Metal Materials: Structure, Properties and Heat Treatment

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: 25 May 2025 | Viewed by 910

Special Issue Editor

Dr. Jiayi Zhang

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Guest Editor
Faculty of Materials Science and Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China
Interests: aluminium; nickel-based superalloys; materials characterization; copper foil
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

This research necessitates the precise manipulation of heat treatment process parameters, encompassing temperature, duration, and cooling rate, to systematically analyze the phase transformation behavior, grain refinement mechanisms, and mechanical property evolution of metallic materials under varying heat treatment conditions. It aims to elucidate the influence of heat treatment on the microhardness, strength, toughness, creep resistance, fatigue endurance, and corrosion resistance of metallic materials, thereby furnishing a theoretical foundation for optimizing material properties to meet the demands of advanced engineering applications.

Dr. Jiayi Zhang
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 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

  • metallic materials
  • heat treatment
  • microstructure
  • mechanical properties
  • phase transformation behavior

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Published Papers (2 papers)

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Research

15 pages, 8928 KiB  
Article
Aging Behavior of 10CrNi2Mo3Cu2V Maraging Alloy: Clustering, Precipitation, and Strengthening
by Jiqing Zhao, Gang Yang and Zhihua Gong
Metals 2025, 15(4), 389; https://doi.org/10.3390/met15040389 - 30 Mar 2025
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Abstract
The high-temperature performance of 10CrNi2Mo3Cu2V steel is critically governed by the distribution of Cu-rich phases. This study systematically investigated the evolution of solute redistribution, Cu-rich phase precipitation, microstructural transformations, and mechanical properties in 10CrNi2Mo3Cu2V alloy under varying aging temperatures. Advanced characterization techniques, including [...] Read more.
The high-temperature performance of 10CrNi2Mo3Cu2V steel is critically governed by the distribution of Cu-rich phases. This study systematically investigated the evolution of solute redistribution, Cu-rich phase precipitation, microstructural transformations, and mechanical properties in 10CrNi2Mo3Cu2V alloy under varying aging temperatures. Advanced characterization techniques, including atom probe tomography (APT) and transmission electron microscopy (TEM), were employed to analyze microstructural features and phase formation in both as-built and heat-treated specimens. The key findings reveal that copper atom segregation initiates at a tempering temperature of 350 °C. Upon increasing the temperature to 450 °C, extensive precipitation of nanoscale copper clusters is observed. Temperatures exceeding 450 °C trigger the formation of ε-Cu phases, which undergo subsequent coarsening. Notably, these copper clusters and Cu-rich precipitates act as dislocation pinning sites, promoting crack nucleation and propagation, thereby markedly degrading the alloy’s impact energy absorption capacity. The critical diameter for Orowan mechanism-governed strengthening by Cu-rich phases is determined to be ~6 nm, while the average diameter of matrix-penetrating Cu-rich particles is approximately 1.46 nm. Quantitative analysis demonstrated that the combined contributions of the Orowan bypass mechanism and particle-cutting mechanism yield a strength enhancement of ~219 MPa, which exhibits excellent agreement with experimentally measured strength increments. These results provide critical insights into the interplay between microstructural evolution and mechanical degradation in precipitation-strengthened steels under thermal exposure. Full article
(This article belongs to the Special Issue Advances in Metal Materials: Structure, Properties and Heat Treatment)
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11 pages, 8951 KiB  
Article
Various Manufacturing Technologies and Their Influence on the Fatigue Strength of Cu-Mg Wires
by Paweł Strzępek, Andrzej Nowak and Małgorzata Zasadzińska
Metals 2025, 15(2), 216; https://doi.org/10.3390/met15020216 - 18 Feb 2025
Viewed by 431
Abstract
Copper alloys are widely used in many branches of industry due to their excellent corrosion resistance and high level of both electrical conductivity and strength. Among others, there are copper alloys with magnesium, which are known and commonly used with Mg content of [...] Read more.
Copper alloys are widely used in many branches of industry due to their excellent corrosion resistance and high level of both electrical conductivity and strength. Among others, there are copper alloys with magnesium, which are known and commonly used with Mg content of up to 0.7 wt.%. Here, we study Cu-Mg alloys with 2.8 wt.% and 3.2 wt.% of Mg, the properties of which are yet to be determined. One of these is the fatigue strength of materials, which is crucial for maintaining the long-term and safe operation of wires in engineering applications. Fatigue is a process during which materials are subjected to cyclic stress below the ultimate tensile strength of materials, leading to their damage or failure. In the current paper, CuMg2.8 and CuMg3.2 wires were obtained using a laboratory chain drawbench and an industrial drum-type drawing machine to verify the influence of manufacturing technology on the fatigue strength of materials. The obtained results were correlated with analogically obtained copper wires by taking into consideration the influence of the chemical composition, structure of fractures, stress and manufacturing technology. It was discovered that it is possible to obtain wires regardless of the drawing machine type and the concentration of Mg. However, CuMg3.2 wires obtained in the industrial conditions experienced delamination and brittle fractures during unwinding from the drum, and thus, their use was not possible. Full article
(This article belongs to the Special Issue Advances in Metal Materials: Structure, Properties and Heat Treatment)
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