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Metals
Special Issues
Advances in Microstructural Characterization of Metallic Materials
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Advances in Microstructural Characterization of Metallic Materials

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

Deadline for manuscript submissions: closed (30 June 2019)

Special Issue Editor

Prof. Mark Aindow

E-Mail Website
Guest Editor
Department of Materials Science and Engineering, Institute of Materials Science, University of Connecticut, Storrs CT 06269-3136, USA
Interests: defects and interfaces; microstructural development in alloys and thin films; electron microscopy

Special Issue Information

Dear Colleagues,

Recent advances in analytical instrumentation allow for microstructural data to be obtained at far higher levels of spatial resolution and chemical sensitivity than could be achieved using traditional instruments. The application of these advanced microstructural characterization techniques has provided new insights into the structural and chemical features that determine the properties of metallic systems. The objective of this Special Issue is to bring together a collection of articles about the latest developments in microstructural characterization techniques and their applications. Contributions including review articles, full-length reports of original research and short communications are all welcome. The scope of the issue is intentionally broad and will cover all aspects of imaging, diffraction and spectrometry using beams of electromagnetic radiation, electrons, ions, and other particles. It will also encompass related techniques such as atom probe tomography and scanned probe microscopy. The issue will include articles describing the application of such techniques to metallic systems, ranging from conventional ferrous and non-ferrous alloys to more exotic materials, including metallic glasses, quasicrystals and high-entropy alloys.

Prof. Mark Aindow
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
  • Imaging
  • Diffraction
  • Spectrometry

Published Papers (2 papers)

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Research

19 pages, 8491 KiB  
Article
Investigation of Test Parameters on EBSD Analysis of Retained Austenite in TRIP and Pipeline Steels
by Yucheng Zhang, Ping Lai, Huiping Jia, Xinhua Ju and Guibin Cui
Metals 2019, 9(1), 94; https://doi.org/10.3390/met9010094 - 16 Jan 2019
Cited by 10 | Viewed by 3675
Abstract
In this article we discuss the effect of different test parameters on the analysis of retained austenite in TRIP590, TRIP780 and X90 steels, by means of Electron Backscattered Diffraction (EBSD) and X-ray Diffraction (XRD), respectively. By analyzing the measuring retained austenite content under [...] Read more.
In this article we discuss the effect of different test parameters on the analysis of retained austenite in TRIP590, TRIP780 and X90 steels, by means of Electron Backscattered Diffraction (EBSD) and X-ray Diffraction (XRD), respectively. By analyzing the measuring retained austenite content under different conditions, the optimal test parameters were obtained. The retained austenite content measured both by the EBSD and XRD methods were also compared. The results showed that the test parameters had a great influence on the measured results of retained austenite content in steel by the EBSD method. The higher the indexing rate, the better the precision of the measured results. The step size used for EBSD analysis should not exceed 1/5 of the average grain size of retained austenite. The scanning area for EBSD retained austenite analysis in TRIP and pipeline steels should be no less than 0.068 mm2, which is recommended to be performed by multiple small fields. Full article
(This article belongs to the Special Issue Advances in Microstructural Characterization of Metallic Materials)
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17 pages, 12820 KiB  
Article
Microstructural Characterization of Surface Softening Behavior for Cu-Bearing Martensitic Steels after Laser Surface Heat Treatment
by Eun-Joon Chun, Ahjin Sim, Min-Su Kim and Namhyun Kang
Metals 2018, 8(6), 470; https://doi.org/10.3390/met8060470 - 20 Jun 2018
Cited by 13 | Viewed by 6084
Abstract
The surface hardening and softening behavior of two types of medium carbon martensitic steel (AISI P20-improved and AISI P21) after laser-assisted heat treatment was quantitatively compared. The laser-assisted heat treatment was performed using a high-power diode laser with in situ temperature and laser [...] Read more.
The surface hardening and softening behavior of two types of medium carbon martensitic steel (AISI P20-improved and AISI P21) after laser-assisted heat treatment was quantitatively compared. The laser-assisted heat treatment was performed using a high-power diode laser with in situ temperature and laser power control (two-color pyrometer system). For AISI P20-improved steel, the peak hardness value within the hardening zone was approximately 640 HV after laser-assisted heat treatment at a temperature of 1473 K. In other words, the hardness increased by 120% from the base metal level (290 HV). However, for AISI P21 steel, the hardness within the heat-treated zone did not change from that of the base metal (410 HV), despite being accompanied by martensite transformation. Moreover, it was clearly observed that the hardness dropped below the level of the base metal at the boundary between the heat-treated zone and the base metal region, forming a softening zone. This softening behavior was strongly related to coarsening and a looser distribution of Cu precipitates compared with that of the base metal region, despite the same matrix phase (i.e., tempered martensite) existing in the softening zone and in the base metal region. Full article
(This article belongs to the Special Issue Advances in Microstructural Characterization of Metallic Materials)
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