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Heat Treatment of Engineering Materials including Steel, Magnesium, and Aluminum...
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Heat Treatment of Engineering Materials including Steel, Magnesium, and Aluminum Alloys

A special issue of Metals (ISSN 2075-4701). This special issue belongs to the section "Metal Casting, Forming and Heat Treatment".

Deadline for manuscript submissions: closed (31 August 2022) | Viewed by 3885

Special Issue Editor

Dr. Sunmi Shin

E-Mail Website
Guest Editor
Advanced Forming Process R&D Group, Korea Institute of Industrial Technology (KITECH), Ulsan 44776, Korea
Interests: steels; aluminum alloys; magnetic materials; microstructure; properties; casting; additive manufacturing

Special Issue Information

Dear Colleagues,

Steel, aluminum, magnesium, and their alloys are the most abundant metals in the earth's crust and are widely applied in various industries such as the construction, automotive, ship building, aerospace, and IT industries. The heat treatment of these metals, which is one of the most important manufacturing processes for achieving the various properties required for each application, is the subject of this Special Issue. Heat treatment is the process of heating and cooling materials using specific, predetermined methods to alter the physical or chemical properties of the material and to obtain the desired properties for a particular application. Heat treatment techniques include annealing, normalizing, hardening, aging, stress relieving, tempering, carburization, and nitriding. Lots of different heat treatment processes have been developed and new processes are constantly being developed to improve product properties and cost-efficiency. According to the type and process conditions of the heat treatment, a change in the microstructure of the material is induced, thereby changing the physical properties, that is, hardness, toughness, ductility, brittleness, corrosion resistance, electrical resistance, and magnetism.

This Special Issue embraces interdisciplinary work covering physical metallurgy and processes, reporting on experimental and theoretical progress concerning microstructural evolution during the heat treatment of steel, aluminum, and magnesium alloys. Research on the microstructure and property changes in these metals caused by heating and cooling incidentally generated during other processes such as welding and hot forming is included in the Special Issue, despite this topic not strictly involving direct heat treatment. Manuscripts are highly welcomed from both academic and commercial viewpoints with progressive results

Dr. Sunmi Shin
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

  • Heat treatment
  • Steels
  • Aluminum alloys
  • Magnesium alloys
  • Microstructure
  • Annealing
  • Aging
  • Hardening

Published Papers (2 papers)

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Research

24 pages, 9025 KiB  
Article
Effect of Al Content on the Microstructural and Grain Growth Kinetics of Magnesium Alloys
by Ruinan Chen, Qinghua Chen, Xu Huang, Qingsong He, Jian Su, Bin Tan, Chao Xu, Huahong Deng and Qingwei Dai
Metals 2022, 12(11), 1955; https://doi.org/10.3390/met12111955 - 15 Nov 2022
Cited by 3 | Viewed by 1583
Abstract
In order to control the grain size in thermomechanical processing, the grain growth behavior of hot extruded Mg–xAl–1Zn (x = 3, 6, 9) alloys and their relationship with second phase particles and solutes were investigated. The growth rate of AZ61 is greater than [...] Read more.
In order to control the grain size in thermomechanical processing, the grain growth behavior of hot extruded Mg–xAl–1Zn (x = 3, 6, 9) alloys and their relationship with second phase particles and solutes were investigated. The growth rate of AZ61 is greater than that of AZ31 and AZ91 at 300 °C, 350 °C, 400 °C, and 450 °C under isothermal annealing. The average grain growth exponents n of Mg–xAl–1Zn (x = 3, 6, 9) alloys were 2.26, 2.33, and 2.53 at 300–400 °C, respectively. The deviation from the theoretical value of 2 was attributed to the hindrance of grain boundary migration of Al-rich second phase particles and solute Al. Microscopic observations show that the grain size of the annealed samples is closely related to the shape, volume fraction, size, and distribution position of the second phase particles. Significantly, the pinning effect is stronger for lamellar and network-like second phase particles. In addition, the pinning effect of Al-rich second phase particles plays a more important role in grain refinement than the dragging of solute Al. The growth of abnormal grains in the microstructure is attributed to the high energy difference between the preferentially oriented <112¯0> grains and the surrounding grains, which drives the grain boundaries to overcome the same pinning force of the second phase particles. Full article
(This article belongs to the Special Issue Heat Treatment of Engineering Materials including Steel, Magnesium, and Aluminum Alloys)
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11 pages, 5584 KiB  
Article
Ageing Susceptibility of Continuously Annealed Low-Carbon-Steel Strips
by Yunjie Bi, Rui Ge, Ming Yan and Xiaojing Xiong
Metals 2022, 12(8), 1285; https://doi.org/10.3390/met12081285 - 30 Jul 2022
Cited by 1 | Viewed by 1734
Abstract
The continuously annealed low-carbon-steel strips from industrial production showed an average aging index of about 30 N/mm². This increase in yield strength caused by the continuous-annealing process was strongly dependent on the soaking temperature and the soaking time. Whilst the optimization of the [...] Read more.
The continuously annealed low-carbon-steel strips from industrial production showed an average aging index of about 30 N/mm². This increase in yield strength caused by the continuous-annealing process was strongly dependent on the soaking temperature and the soaking time. Whilst the optimization of the overaging parameters and the use of a higher annealing temperature would reduce the ageing susceptibility of low-carbon-steel strips, it was considered unlikely that its magnitude could be reduced to a comparable level to that of the batch-annealed one. Within the limit of low-carbon-strip specifications, there was very little effect of the C content on the ageing. The aging index of the temper-rolled materials decreased with the increase in the temper-rolling reductions, and a maximum increase in yield strength was achieved at a temper-rolling reduction of about 1%. In this work, the effect of C content, Al content, continuous-annealing cycles, and temper-rolling reduction on the ageing susceptibility of the continuously annealed low-carbon-steel strips was examined. SEM/EBSD technique was developed to characterize the temper-rolling strain bands and to assess the effect of temper-rolling reduction on the yield strength of the low-carbon-steel strips. Full article
(This article belongs to the Special Issue Heat Treatment of Engineering Materials including Steel, Magnesium, and Aluminum Alloys)
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