Deformation and Mechanical Behavior of Metals and Alloys

Special Issue Editor


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Guest Editor
School of Materials and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, China
Interests: bainitic steel; low-density steel; stainless steel; rail steel

Special Issue Information

Dear Colleagues,

The deformation behavior of metals and alloys covers a wide range of phenomena, including elastic deformation, which is reversible, and plastic deformation, which involves permanent changes due to dislocation movement. Creep, a slow, time-dependent deformation under constant stress at high temperatures, and fracture, the separation of a material into parts, are also critical phenomena. Research on the deformation behaviors provides a comprehensive understanding of how these materials respond to various forces, which are important for their application in various industries, from construction to aerospace. Mechanical properties like tensile strength, hardness, fatigue resistance, and toughness define a material's performance under different conditions. Tensile strength indicates a material's ability to withstand pulling forces, while hardness measures resistance to deformation and wear. Fatigue resistance is essential for materials subjected to repeated loading, preventing crack initiation and propagation. Toughness reflects a material's ability to absorb energy and deform without breaking, which is crucial for impact and shock resistance.

Continuous research and development in this field continues to enhance the functionality and applications of metals and alloys, promoting technological and industrial advancements. Therefore, this Special Issue mainly focuses on the deformation and mechanical behavior of metals and alloys. We very much look forward to your contributions.

Dr. Guanghui Chen
Guest Editor

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Keywords

  • thermo-mechanical treatment
  • deformation behavior
  • mechancical properties
  • deformed microstructure
  • fracture surface
  • wear surface

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Published Papers (2 papers)

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Research

14 pages, 9406 KiB  
Article
Erosion Wear Behavior of HVAF-Sprayed WC/Cr3C2-Based Cermet and Martensitic Stainless Steel Coatings on AlSi7Mg0.3 Alloy: A Comparative Study
by Yury Korobov, Maksim Antonov, Vladimir Astafiev, Irina Brodova, Vladimir Kutaev, Svetlana Estemirova, Mikhail Devyatyarov and Artem Okulov
J. Manuf. Mater. Process. 2024, 8(5), 231; https://doi.org/10.3390/jmmp8050231 - 14 Oct 2024
Viewed by 846
Abstract
The paper presents a comparative study of the erosion wear resistance of WC-10Co4Cr, Cr3C2-25NiCr and martensitic stainless steel (SS) coatings deposited onto an AlSi7Mg0.3 (Al) alloy substrate by high-velocity air‒fuel (HVAF) spraying. The influence of the abrasive type (quartz [...] Read more.
The paper presents a comparative study of the erosion wear resistance of WC-10Co4Cr, Cr3C2-25NiCr and martensitic stainless steel (SS) coatings deposited onto an AlSi7Mg0.3 (Al) alloy substrate by high-velocity air‒fuel (HVAF) spraying. The influence of the abrasive type (quartz sand or granite gravel), erodent attack angle, thickness, and microhardness of the coatings on their and Al substrate’s wear resistance was comprehensively investigated under dry erosion conditions typical for fan blades. The HVAF-spraying process did not affect the Al substrate’s structure, except for when the near-surface layer was 20‒40 μm thick. This was attributed to the formation of a modified Al-Si eutectic with enhanced microhardness and strength in the near-substrate area. Mechanical characterization revealed significantly higher microhardness values for the cermet WC-10Co4Cr (~12 GPa) and Cr3C2-25NiCr (~9 GPa) coatings, while for the SS coating, the value was ~5.7 GPa. Erosion wear tests established that while Cr3C2-25NiCr and SS coatings were more sensitive to abrasive type, the WC-10Co4Cr coating exhibited significantly higher wear resistance, outperforming the alternatives by 2‒17 times under high abrasive intensity. These findings highlight the potential of HVAF-sprayed WC-10Co4Cr coatings for extending the service life of AlSi7Mg0.3-based fan blades exposed to erosion wear at normal temperatures. Full article
(This article belongs to the Special Issue Deformation and Mechanical Behavior of Metals and Alloys)
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18 pages, 10991 KiB  
Article
The Influence of Shot Peening Media on Surface Properties and Fatigue Behaviour of Aluminium Alloy 6082 T6
by Erik Calvo-García, Jesús del Val, Antonio Riveiro, Sara Valverde-Pérez, David Álvarez, Manuel Román, César Magdalena, Aida Badaoui, Pablo Pou-Álvarez and Rafael Comesaña
J. Manuf. Mater. Process. 2024, 8(5), 192; https://doi.org/10.3390/jmmp8050192 - 3 Sep 2024
Viewed by 876
Abstract
Shot peening is generally used to improve the fatigue performance of mechanical components. However, identifying the geometrical and mechanical characteristics of the shots that improve fatigue strength is still a challenging task, as there are many variables involved in the shot peening process. [...] Read more.
Shot peening is generally used to improve the fatigue performance of mechanical components. However, identifying the geometrical and mechanical characteristics of the shots that improve fatigue strength is still a challenging task, as there are many variables involved in the shot peening process. The present work addresses the effect of different shot media on the fatigue behaviour of an aluminium alloy 6082 T6. Four different shot types were used: silica microspheres, alumina shots, aluminium cut wire and zinc cut wire. Axial fatigue tests were carried out to obtain the Wöhler curves corresponding to each shot peening treatment. The surface properties of the shot-peened specimens, such as grain size, hardness, residual stress and roughness were measured to determine their effect on the fatigue results. The fatigue results revealed that silica and zinc shots increased significantly the fatigue life of the alloy, whereas alumina and aluminium shots reduced its fatigue strength. Almen intensities have shown to correlate well with grain refinement and strain hardening. However, better fatigue results were obtained with the shots that generated higher surface compressive residual stresses. It is believed that small and smooth shots are preferable to sharp and irregular ones, regardless of the Almen intensity or surface hardness attained with the latter. Full article
(This article belongs to the Special Issue Deformation and Mechanical Behavior of Metals and Alloys)
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