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Microstructure and Mechanical Properties of Metals and Alloys (Volume II)

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Metals and Alloys".

Deadline for manuscript submissions: closed (20 August 2023) | Viewed by 2690

Special Issue Editor


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Guest Editor
Division of Light Metal, Korea Institute of Materials Science (KIMS), Seongsan-gu, Changwon-si 51508, Gyeongsangnam-do, Republic of Korea
Interests: material characterization; mechanical properties; materials; light alloys
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Special Issue Information

Dear Colleagues,

Metals and alloys have played important roles in enabling modern structural designs in practice. This Special Issue seeks to collect various scientific and/or engineering reports pertaining to research on metals and alloys that present applicable advances of our knowledge of the structures, properties, and performance capabilities of these materials. Affordable processing and fabrication methods, as well as characterization and evaluation methods, are also crucial topics related to the wider application of metallic materials in both academia and industry. Starting with the microstructural and mechanical properties of metals and alloys, appropriate correlations among the processing, properties, and performance characteristics will lead to a better understanding of the nature of these materials and improve their engineering application capabilities. Various theoretical and experimental approaches to assessing the mechanical behaviors of these materials are a basic concern of many materials researchers. Numerical and computational approaches can also herald new challenges and enrich our insight into new means of the exploitation of new metallic alloying systems. Plastic deformation and subsequent heat treatments cause various microstructural changes, and thus alter important mechanical properties. Lightweight metals have also attracted much attention as potential design materials for automobiles, electronics, and sporting equipment, in addition to potentially meeting the demands of better fuel efficiency or CO2 reduction.

This Special Issue aims to focus on the processing, microstructure, and mechanical properties of metals and alloys within a materials relationship framework including, but not limited to, the following topics:

  • Fabrication and processing of metallic materials and alloys for the microstructural and mechanical control of properties, such as casting, thermo-mechanical processing, metal forming, bonding and welding;
  • Characterization and evaluation of metallic materials and alloys based on various methodologies, including theoretical and numerical methods as well as microscopy and mechanical testing;
  • Deformation, recrystallization, and grain growth based on microstructures, morphologies, textures, and anisotropy characteristics;
  • Lightweight structural metallic materials, such as alloys containing aluminum and magnesium, as well as other metals;
  • Special applications of metallic materials, such as high-temperature-resistant materials, corrosion-resistant materials, bio-degradable metals, and advanced high-strength steels.

Dr. Jae-Hyung Cho
Guest Editor

Manuscript Submission Information

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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. Materials is an international peer-reviewed open access semimonthly 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 and texture
  • mechanical properties
  • fabrication and processing
  • characterization and evaluation
  • deformation and annealing
  • modeling and simulation

Published Papers (2 papers)

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Research

20 pages, 11418 KiB  
Article
Microstructure and Mechanical Properties of Weaving Wire and Arc Additive Manufactured AZ91 Magnesium Alloy Based on Cold Metal Transfer Technique
by Zhongrui Zhang, Junqi Shen, Ji Bi, Shengsun Hu, Yahui Zhen and Xianzheng Bu
Materials 2023, 16(11), 4047; https://doi.org/10.3390/ma16114047 - 29 May 2023
Cited by 3 | Viewed by 1198
Abstract
Based on the cold metal transfer (CMT) technique, a deposited wall of AZ91 magnesium alloy was fabricated by weaving wire and arc additive manufacturing (WAAM), the shaping, microstructure, and mechanical properties of the sample with the weaving arc were characterized and discussed by [...] Read more.
Based on the cold metal transfer (CMT) technique, a deposited wall of AZ91 magnesium alloy was fabricated by weaving wire and arc additive manufacturing (WAAM), the shaping, microstructure, and mechanical properties of the sample with the weaving arc were characterized and discussed by compared with the sample without the weaving arc, and the effects of the weaving arc on grain refinement and property enhancement of the AZ91 component by CMT-WAAM process were investigated. After introducing the weaving arc, the effective rate of the deposited wall could be increased from 84.2% to 91.0%, and the temperature gradient of the molten pool could be reduced with an increase in constitutional undercooling. The equiaxed α-Mg grains became more equiaxial due to the dendrite remelting, and the β-Mg17Al12 phases distributed uniformly induced by the forced convection after introducing the weaving arc. Compared to the deposited component fabricated by the CMT-WAAM process without the weaving arc, the average ultimate tensile strength and elongation of the component by weaving the CMT-WAAM process both increased. The weaving CMT-WAAM component showed isotropy and has better performance than the traditional cast AZ91 alloy. Full article
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15 pages, 34687 KiB  
Article
Process Optimization of Dual-Liquid Casting and Interfacial Strength–Toughness of the Produced LAS/HCCI Bimetal
by Zhen-Guo Xing, Li-Xin He, Shun-Xing Liang, Lian-Bo Chang, Zhi-Xia Xiao, Wan-Li Xing, Hai-Bin Shen, Jing-Jing Cao and Hong-Ji Liu
Materials 2023, 16(5), 2008; https://doi.org/10.3390/ma16052008 - 28 Feb 2023
Cited by 1 | Viewed by 1217
Abstract
The pouring time interval is the decisive factor of dual-liquid casting for bimetallic productions. Traditionally, the pouring time interval is fully determined by the operator’s experience and on-site observation. Thus, the quality of bimetallic castings is unstable. In this work, the pouring time [...] Read more.
The pouring time interval is the decisive factor of dual-liquid casting for bimetallic productions. Traditionally, the pouring time interval is fully determined by the operator’s experience and on-site observation. Thus, the quality of bimetallic castings is unstable. In this work, the pouring time interval of dual-liquid casting for producing low alloy steel/high chromium cast iron (LAS/HCCI) bimetallic hammerheads is optimized via theoretical simulation and experimental verification. The relevancies of interfacial width and bonding strength to pouring time interval are, respectively, established. The results of bonding stress and interfacial microstructure indicate that 40 s is the optimum pouring time interval. The effects of interfacial protective agent on interfacial strength–toughness are also investigated. The addition of the interfacial protective agent yields an increase of 41.5% in interfacial bonding strength and 15.6% in toughness. The optimum dual-liquid casting process is used to produce LAS/HCCI bimetallic hammerheads. Samples cut from these hammerheads show excellent strength–toughness (1188 Mpa for bonding strength and 17 J/cm2 for toughness). The findings could be a reference for dual-liquid casting technology. They are also helpful for understanding the formation theory of the bimetal interface. Full article
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