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Metals
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Combinatorial Investigations of Alloys
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Combinatorial Investigations of Alloys

A special issue of Metals (ISSN 2075-4701). This special issue belongs to the section "Structural Integrity of Metals".

Deadline for manuscript submissions: closed (1 March 2022) | Viewed by 7563

Special Issue Editor

Prof. Dongwoo Lee

E-Mail Website
Guest Editor
Sungkyunkwan University, Suwon, Korea
Interests: combinatorial materials science; thin films; multicomponent alloys

Special Issue Information

Dear Colleagues,

Unveiling the relationships among the composition, microstructure, processing, and properties of alloys is crucial not only to achieve a fundamental understanding of existing material systems but also for the discovery of novel alloys with unprecedented properties. Combinatorial materials science is an emerging field and has facilitated the composition–microstructure–processing-property mapping of various alloys. Furthermore, with the help of the modern progress of the accelerated measurement schemes, it is now possible to efficiently acquire mechanical, thermal, electrical, and physical/chemical properties of a broad range of alloys.

Many of the advanced alloys, such as metallic glasses, high-entropy alloys, superalloys, self-healing alloys, and shape memory alloys, consist of multiple constituent elements. As the unexplored composition and microstructural regions of the multicomponent alloys are immense, the use of the combinatorial and high-throughput approach would allow the rapid development of novel alloys. In this Special Issue, original research articles or critical review articles on the following topics shall be published:

Combinatorial experimental or computational studies of alloys;

Novel experimental techniques for rapid characterizations of advanced alloys;

Investigation of advanced alloys under various processing and environmental conditions.

I am glad to invite you to submit your work to the Special Issue, “Combinatorial Investigations of Alloys”.

Prof. Dongwoo Lee
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

  • combinatorial materials science
  • high-throughput experiments
  • multicomponent alloys
  • properties
  • thin films

Published Papers (3 papers)

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Research

12 pages, 2459 KiB  
Article
Nonlinear Ultrasonic Guided Wave Method Using Semi-Analytical Finite Element (SAFE) Technique on a Damaged SWO-V Spring Coil
by Jeongnam Kim, Junpil Park, Bo Zhu and Younho Cho
Metals 2021, 11(5), 752; https://doi.org/10.3390/met11050752 - 2 May 2021
Cited by 2 | Viewed by 1778
Abstract
This work presents a non-destructive method for quantitative essessment of fatigue damage of materials with linear elastic properties using nonlinear ultrasonic techniques. A nonlinear study was conducted on these materials with fatigue and shot peening processing using a nonlinear ultrasonic technique. A numerical [...] Read more.
This work presents a non-destructive method for quantitative essessment of fatigue damage of materials with linear elastic properties using nonlinear ultrasonic techniques. A nonlinear study was conducted on these materials with fatigue and shot peening processing using a nonlinear ultrasonic technique. A numerical method based on the semi-analytical finite element (SAFE) technique, was used to obtain the phase-matching modes of the specimens. Experiments confirm that the nonlinearity for shot peening and samples with a certain level of fatigue shows a tendency to increase with levels of fatigue. Full article
(This article belongs to the Special Issue Combinatorial Investigations of Alloys)
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10 pages, 8295 KiB  
Article
Microstructural Investigation of Stress Corrosion Cracking in Cold-Formed AISI 304 Reactor
by Ihho Park, Eun-Young Kim and Won-Jon Yang
Metals 2021, 11(1), 7; https://doi.org/10.3390/met11010007 - 23 Dec 2020
Cited by 14 | Viewed by 2373
Abstract
The aim of this study was to investigate cracking behavior of AISI 304 stainless steel that had been exposed to a high temperature MgCl2 solution for several years. The microstructure of the cracked area of the reactor was studied by in-depth microstructural [...] Read more.
The aim of this study was to investigate cracking behavior of AISI 304 stainless steel that had been exposed to a high temperature MgCl2 solution for several years. The microstructure of the cracked area of the reactor was studied by in-depth microstructural characterization. Transgranular stress corrosion cracking only occurred at the cold-formed part of the reactor. It was observed that approximately 10–20% of the austenite matrix was transformed into alpha prime martensite due to cold forming at the lower head of the reactor. The preferential path for crack propagation was found to be strain-induced alpha prime martensite. The present study reveals that strain-induced martensitic transformation in austenitic stainless steel has a negative effect on stress corrosion cracking. Full article
(This article belongs to the Special Issue Combinatorial Investigations of Alloys)
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16 pages, 10839 KiB  
Article
An Infrared Local-Heat-Assisted Cold Stamping Process for Martensitic Steel and Application to an Auto Part
by Ki-Young Kim, Eun-Ho Lee, Soo-Hyun Park, Youn-Hee Kang, Jong-Youn Park, Hyoun-Young Lee, Chang Ho Moon and Kisoo Kim
Metals 2020, 10(11), 1543; https://doi.org/10.3390/met10111543 - 20 Nov 2020
Cited by 6 | Viewed by 2789
Abstract
The automotive industry has tried to employ ultra-high-strength steel (UHSS), which has a higher strength with a thinner thickness. However, because of its low formability, there is a limit to the use of UHSS in industrial applications. Even though the hot-press-forming method can [...] Read more.
The automotive industry has tried to employ ultra-high-strength steel (UHSS), which has a higher strength with a thinner thickness. However, because of its low formability, there is a limit to the use of UHSS in industrial applications. Even though the hot-press-forming method can resolve the formability problem, elevated-temperature conditions lead to side effects—heat transfer and productivity issues. This work presents the concept of an infrared local-heat-assisted cold stamping process. Before the forming process, local areas, where the formability problem occurs, are locally heated by the gathering of infrared rays and cooled to room temperature before delivery. Since the heat treatment is completed by the material supplier, the stamping companies can conduct cold stamping without new investments or the productivity issue. In this work, a heat-assisted cold V-bending test was conducted with a martensitic (MS) 1.5 GPa steel, the CR1470M steel provided by POSCO. The heating effects on the microstructure, hardness, and local ductility were also observed. Finally, a commercial door impact beam was successfully manufactured with the present method. In this application, only a targeted small area was heated. The results show that the present method can improve the formability and springback problems of MS steel in the stamping process. Full article
(This article belongs to the Special Issue Combinatorial Investigations of Alloys)
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