Design, Processing and Characterization of Metals and Alloys

A special issue of Metals (ISSN 2075-4701).

Deadline for manuscript submissions: closed (15 June 2024) | Viewed by 921

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Guest Editor
School of Materials Science and Engineering, Central South University, Changsha 410083, China
Interests: microstructure characterization; plastic deformation and recrystallization of light metals; mechanical property
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Special Issue Information

Dear Colleagues,

Metals and alloys, such as pure copper, aluminum alloy, steel, and TiAl intermetallic, are important materials for the aerospace, automobile, and electronic industries. All the products applied to any engineering field must experience the whole process of design and processing, including composition design, microstructure design, processing method and relative parameters. Furthermore, to detect the microstructure and optimize the service performance, both microstructure characterization and mechanical characterization are required to different extents. Thus, it is quite important to understand and unveil the close links among design, processing and characterization. This is the aim of this Special Issue, entitled “Design, Processing and Characterization of Metals and Alloys”, and we hope to collect excellent studies on any metal or alloy from around the world. Works concerning but not limited to aluminum alloy, magnesium alloy, steel, copper, brass, Ti-Al, heat treatment, plastic deformation, mechanical behavior, phase transformation, and microstructure characterization are all welcome.

Dr. Qinghuan Huo
Guest Editor

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Keywords

  • microstructure
  • plastic deformation
  • heat treatment
  • deformation mechanism
  • mechanical property
  • phase transformation
  • grain boundary

Published Papers (1 paper)

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Research

15 pages, 3971 KiB  
Article
Study of Tensile and Compressive Behavior of ECO-Mg97Gd2Zn1 Alloys Containing Long-Period Stacking Ordered Phase with Lamellar Structure
by Gerardo Garcés, Judit Medina, Pablo Pérez, Rafael Barea, Hyunkyu Lim, Shae K. Kim, Emad Maawad, Norbert Schell and Paloma Adeva
Metals 2024, 14(5), 530; https://doi.org/10.3390/met14050530 - 30 Apr 2024
Viewed by 682
Abstract
A suitable heat treatment in the Mg97Gd2Zn1 (at.%) alloy in the as-cast condition results, after extrusion at high temperature, in a two-phase lamellar microstructure consisting of magnesium grains with thin lamellar shape precipitates and long fibers of the [...] Read more.
A suitable heat treatment in the Mg97Gd2Zn1 (at.%) alloy in the as-cast condition results, after extrusion at high temperature, in a two-phase lamellar microstructure consisting of magnesium grains with thin lamellar shape precipitates and long fibers of the 14H-Long-Period Stacking Ordered (LPSO) phase elongated in the extrusion direction. The magnesium matrix is not fully recrystallized and highly oriented coarse non-dynamically recrystallized (non-DRXed) grains (17% volume fraction) elongated along the extrusion direction remain in the material. The deformation mechanisms of the extruded alloy have been studied measuring the evolution of the internal strains during in situ tension and compression tests using synchrotron diffraction radiation. The data demonstrate that the macroscopic yield stress is governed by the activation of the basal slip system in the randomly oriented equiaxed dynamic recrystallized (DRXed) grains. Non-DRXed grains, due to their strong texture, are favored oriented for the activation of tensile twinning. However, the presence of lamellar-shape precipitates strongly delays the propagation of lenticular thin twins through these highly oriented grains and they have no effect on the onset of the plastic deformation. Therefore, the tension–compression asymmetry is low since the plasticity mechanism is independent of the stress mode. Full article
(This article belongs to the Special Issue Design, Processing and Characterization of Metals and Alloys)
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