Recent Advances in Microstructure and Properties of Metals and Alloys (2nd Edition)

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Department of Metal Forming, Welding and Metrology, Wroclaw University of Science and Technology, Lukasiewicza 5 Street, 50-370 Wroclaw, Poland
Interests: corrosion; metallography; microstructure; metals; mechanical properties; SEM; light microscopy
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Brunel Centre for Advanced Solidification Technology, Brunel University London, Uxbridge UB8 3PH, UK
Interests: solification of metals; aluminium alloys; magnesium alloys; casting of metals; mechanical properties of metallic metarials; microstructure
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Special Issue Information

Dear Colleagues,

Metallic materials are polycrystalline materials widely used in the production of many elements and engineering structures. The microstructure and technological production process of alloys are fundamental determinants of their mechanical, thermal, and electrical properties and, in many cases, constitute a major limiting factor in their use in many industrial applications. This Special Issue aims to provide a comprehensive analysis of the latest research in the field of metals, their alloy microstructures, and their implications for material performance. The continuous development of manufacturing processes means that research on these issues remains current.

This Special Issue will present the latest achievements in testing the properties of metallic materials produced using various manufacturing technologies, including heat treatment, as well as considerations regarding the relationship between innovative technological parameters, manufacturing technologies, and welding and production methods; the microstructure whose evolution they influence; and the properties of the obtained products.

This Special Issue on “Recent Advances in Microstructure and Properties of Metals and Alloys (2nd Edition)” will serve as a valuable resource for materials scientists, engineers, and technologists, offering a deeper understanding of the complex interplay between the microstructures and properties of alloys.

Dr. Marzena Lachowicz
Dr. Erdem Karakulak
Guest Editors

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Keywords

  • microstructure characterization
  • phase transformations
  • material properties
  • mechanical properties
  • corrosion resistance
  • manufacturing technology

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Published Papers (1 paper)

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Research

17 pages, 6517 KB  
Article
Investigation of Process and Properties of Cu-Mn-Al Alloy Cladding Deposited on 27SiMn Steel via Cold Metal Transfer
by Jin Peng, Shihua Xie, Junhai Xia, Xingxing Wang, Zenglei Ni, Pei Wang and Nannan Chen
Crystals 2025, 15(10), 858; https://doi.org/10.3390/cryst15100858 - 30 Sep 2025
Viewed by 197
Abstract
This study systematically investigates the effects of welding current on the macro-morphology, microstructure, mechanical properties, and corrosion resistance of Cu-Mn-Al alloy coatings deposited on 27SiMn steel substrates using Cold Metal Transfer (CMT) technology. The 27SiMn steel is widely applied in coal mining, geology, [...] Read more.
This study systematically investigates the effects of welding current on the macro-morphology, microstructure, mechanical properties, and corrosion resistance of Cu-Mn-Al alloy coatings deposited on 27SiMn steel substrates using Cold Metal Transfer (CMT) technology. The 27SiMn steel is widely applied in coal mining, geology, and engineering equipment due to its high strength and toughness, but its poor corrosion and wear resistance significantly limits service life. To address this issue, a Cu-Mn-Al alloy (high-manganese aluminum bronze) was selected as a cladding material because of its superior combination of mechanical strength, toughness, and excellent corrosion resistance in saline and marine environments. Compared with conventional cladding processes, CMT technology enables low-heat-input deposition, reduces dilution from the substrate, and promotes defect-free coating formation. To the best of our knowledge, this is the first report on the fabrication of Cu-Mn-Al coatings on 27SiMn steel using CMT, aiming to optimize process parameters and establish the relationship between welding current, phase evolution, and coating performance. The experimental results demonstrate that the cladding layer width increases progressively with welding current, whereas the layer height remains relatively stable at approximately 3 mm. At welding currents of 120 A and 150 A, the cladding layer primarily consists of α-Cu, κII, β-Cu3Al, and α-Cu + κIII phases. At higher welding currents (180 A and 210 A), the α-Cu + κIII phase disappears, accompanied by the formation of petal-shaped κI phase. The peak shear strength (509.49 MPa) is achieved at 120 A, while the maximum average hardness (253 HV) is obtained at 150 A. The 120 A cladding layer demonstrates optimal corrosion resistance. These findings provide new insights into the application of CMT in fabricating Cu-Mn-Al protective coatings on steel and offer theoretical guidance for extending the service life of 27SiMn steel components in aggressive environments. Full article
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