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Metals
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Design, Processing and Characterization of Metals and Alloys
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Design, Processing and Characterization of Metals and Alloys

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

Deadline for manuscript submissions: 31 December 2024 | Viewed by 3986

Special Issue Editor

Dr. Qinghuan Huo

E-Mail Website
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
Special Issues, Collections and Topics in MDPI journals

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

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

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

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Published Papers (4 papers)

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Research

17 pages, 11153 KiB  
Article
Microstructural and Mechanical Characterization of the Laser Beam Welded SAF 2507 Super-Duplex Stainless Steel
by Beáta Šimeková, Mária Dománková, Ingrid Kovaříková, Pavel Kovačócy, Maroš Martinkovič, Michal Šimek and Luke Ciuła
Metals 2024, 14(10), 1184; https://doi.org/10.3390/met14101184 - 17 Oct 2024
Viewed by 853
Abstract
The influence of laser beam welding parameters (power, welding rate, focusing, head oscillation, shielding gas) on the microstructure, mechanical properties and corrosion resistance of the super-duplex stainless steel SAF 2507 was studied in this paper. The presented results clearly report the effects of [...] Read more.
The influence of laser beam welding parameters (power, welding rate, focusing, head oscillation, shielding gas) on the microstructure, mechanical properties and corrosion resistance of the super-duplex stainless steel SAF 2507 was studied in this paper. The presented results clearly report the effects of welding parameter changes on the character of the steel’s microstructure. The presence of secondary phase M2N in weld metals has an important influence on their mechanical properties. Optimal mechanical properties, an acceptable ferrite/austenite ratio, and the minimum content of M2N nitride required in the weld metal were acquired in the case the following application: 1100 W power, welding speed of 10 mm/s, focusing of 4 mm, and pure nitrogen shielding gas (20 L/min). Full article
(This article belongs to the Special Issue Design, Processing and Characterization of Metals and Alloys)
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22 pages, 38165 KiB  
Article
Investigation of Properties in Magnesium Alloy Thin Plates after Die Casting Processes
by Jun-Tae Han, Choong-Mo Ryu and Seung-Jae Moon
Metals 2024, 14(9), 970; https://doi.org/10.3390/met14090970 - 27 Aug 2024
Viewed by 695
Abstract
This study systematically analyzed the effect of design conditions on filling behavior and product characteristics when forming thin plates of magnesium alloy (AZ91D) of 0.5 mm or less using the die casting method. As a research method, a casting analysis simulation program was [...] Read more.
This study systematically analyzed the effect of design conditions on filling behavior and product characteristics when forming thin plates of magnesium alloy (AZ91D) of 0.5 mm or less using the die casting method. As a research method, a casting analysis simulation program was used to predict filling and solidification behavior under various process conditions. The molten metal injection temperature (610~670 °C), mold temperature (160~220 °C), and cooling water temperature (10~55 °C) were selected as key variables, and an analysis was performed for a total of five conditions. A simulation was conducted to analyze the charging speed distribution, location of oxides and bubbles, and solidification pattern. As a result of the study, the flow of molten metal in the low and high-speed sections of the plunger, uniformity of product thickness, and supply conditions of the molten metal were confirmed to be major factors. It is important to manage the molten metal injection temperature at an appropriate level to minimize product defects. Based on these conditions, a prototype was manufactured, the microstructure was observed, and a fine and uniform grain structure was observed in most areas. In mechanical property evaluation, superior physical properties were secured compared to existing bulk materials. Full article
(This article belongs to the Special Issue Design, Processing and Characterization of Metals and Alloys)
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13 pages, 7294 KiB  
Article
Effect of Annealing and Double Aging on the Microstructure and Mechanical Properties of Hot-Rolled Al17Cr10Fe36Ni36Mo1 Alloy
by Yunji Qiu, Xinbo Shi, Xiaoming Liu, Zhihua Chen, Jianbin Wang, Xin Liu, Xiaoyu Bai, Feng He and Zhijun Wang
Metals 2024, 14(6), 726; https://doi.org/10.3390/met14060726 - 19 Jun 2024
Viewed by 829
Abstract
AlCrFeNi multi-component alloys with excellent mechanical properties have been designed and extensively investigated in recent years. The massive fabrication of sheets will be an effective way for industrial application, where hot rolling is the inevitable process. After hot rolling, the mechanical properties could [...] Read more.
AlCrFeNi multi-component alloys with excellent mechanical properties have been designed and extensively investigated in recent years. The massive fabrication of sheets will be an effective way for industrial application, where hot rolling is the inevitable process. After hot rolling, the mechanical properties could be further tailored. In this study, the effects of heat treatments on a dual-phase Al17Cr10Fe36Ni36Mo1 hot-rolled plate were systematically investigated, including: (i) annealing (700 °C, 850 °C, 1000 °C and 1150 °C for 1 h, respectively), (ii) solution and single aging (1150 °C for 1 h and 700 °C for 4 h), (iii) solution and double aging (1150 °C for 1 h, 700 °C for 4 h and 650 °C for 1 h). The B2 precipitates with varied morphologies were observed in the FCC matrix of the hot-rolled alloy after a heat treatment range from 700 °C to 1000 °C for 1 h, and the BCC particles in the B2 matrix were dissolved when the heat treatment temperature was higher than 1000 °C. The hot-rolled alloy heat treated at 700 °C for 1 h had the highest yield strength, and the hot-rolled alloy treated at 1150 °C for 1 h showed the lowest yield strength. After a solution at 1150 °C for 1 h, aging at 700 °C for 4 h and 650 °C for 1 h, the L12 phase and BCC particles were precipitated in the FCC and B2 matrices, and B2 nanoprecipitates were observed around the FCC grain boundaries. The solution and double aging alloy exhibit the tensile strength of 1365.7 ± 9.5 MPa, a fracture elongation of 14.2 ± 1.5% at 20 °C, a tensile strength of 641.4 ± 6.0 MPa, and a fracture elongation of 16.9 ± 1.0% at 700 °C, showing great potential for application. Full article
(This article belongs to the Special Issue Design, Processing and Characterization of Metals and Alloys)
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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 1032
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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