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Metals
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State-of-Art: Metals Failure Analysis
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State-of-Art: Metals Failure Analysis

A special issue of Metals (ISSN 2075-4701). This special issue belongs to the section "Metal Failure Analysis".

Deadline for manuscript submissions: closed (30 April 2024) | Viewed by 1994

Special Issue Editor

Prof. Dr. Evangelos Hristoforou

E-Mail Website
Guest Editor
School of Electrical and Computer Engineering, National Technical University of Athens, 15780 Athens, Greece
Interests: sensors; magnetic materials; biotechnology; structure and properties of materials; steel health monitoring
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Failure analysis is the key to explaining failure based on structural characterization, properties determination, and their correlation. But the most important advantage of failure analysis is its ability to assess mistakes that could be corrected or avoided.

However, the scientific interest behind the commercial market importance attracts the interest of scientists who try to understand in detail the reasons behind metal failure. This Special Issue is devoted to ferrous and non-ferrous compounds. Industrialists and researchers are equally invited to contribute in it. We aim for it to offer a reference sum of articles that may aid the newcomer in the field, as well as the expert of metal failure analysis. Moreover, failure analysis and assessment of structural integrity of additively manufactured components has gained significant attention, as these are key for the robust and widespread application of those novel processes and unprecedented structures. Thus, papers related to this topic are highly encouraged.

Prof. Dr. Evangelos Hristoforou
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

  • ferrous metals failure analysis
  • non-ferrous metals failure analysis
  • structural characterization as a tool of metals failure analysis
  • magnetic, electric, optic, thermal and mechanical properties as a tool of metals failure analysis

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Published Papers (2 papers)

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Research

7 pages, 3209 KiB  
Communication
Phase Mapping Using a Combination of Multi-Functional Scanning Electron Microscopy Detectors and Imaging Modes
by Gang Liu, Yonghua Zhao and Shuai Wang
Metals 2024, 14(8), 899; https://doi.org/10.3390/met14080899 - 7 Aug 2024
Viewed by 616
Abstract
Microstructure degradation and phase transformations are critical concerns in nickel-based superalloys during thermal exposure. Understanding the phase transformation mechanism requires the detailed mapping of the distribution of each phase at different degradation stages and in various precipitation sizes. However, differentiating between phases in [...] Read more.
Microstructure degradation and phase transformations are critical concerns in nickel-based superalloys during thermal exposure. Understanding the phase transformation mechanism requires the detailed mapping of the distribution of each phase at different degradation stages and in various precipitation sizes. However, differentiating between phases in large areas, typically on the scale of millimeters and often relying on scanning electron microscopy (SEM) techniques, has traditionally been a challenging task. In this study, we present a novel and efficient phase mapping method that leverages multiple imaging detectors and modes in SEM. This approach allows for the relatively rapid and explicit differentiation and mapping of the distribution of various phases, including MC, M23C6, γ′, and η phases, as demonstrated in a typical superalloy subjected to aging experiments at 800 °C. Full article
(This article belongs to the Special Issue State-of-Art: Metals Failure Analysis)
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14 pages, 3626 KiB  
Article
Quantitative Study on Hydrogen Concentration–Hydrogen Embrittlement Sensitivity of X80 Pipeline Steel Based on Hydrogen Permeation Kinetics
by Rundong Zhang, Songyuan Ai, Mujun Long, Lihua Wan, Yifan Li, Danbin Jia, Huamei Duan and Dengfu Chen
Metals 2024, 14(7), 763; https://doi.org/10.3390/met14070763 - 27 Jun 2024
Viewed by 800
Abstract
The hydrogen concentration in steel is directly related to the hydrogen embrittlement (HE) sensitivity of the steel. This study combined electrochemical hydrogen charging, the slow strain rate test (SSRT), and hydrogen permeation experiments to investigate the variation in the hydrogen concentration in pipeline [...] Read more.
The hydrogen concentration in steel is directly related to the hydrogen embrittlement (HE) sensitivity of the steel. This study combined electrochemical hydrogen charging, the slow strain rate test (SSRT), and hydrogen permeation experiments to investigate the variation in the hydrogen concentration in pipeline steel with the electrochemical hydrogen-charging time. The influence of the hydrogen concentration in steel on the mechanical properties of X80 pipeline steel was obtained, and ultimately, a quantitative relationship between the hydrogen concentration in steel and the hydrogen embrittlement sensitivity was established. The results show that the hydrogen concentration in the steel gradually increased with the time of hydrogen charging, and the quantitative relationship formula can be given as CH = 5.35 − 4.2 exp (−0.26t); the HE index of X80 steel increased with the hydrogen concentration. Additionally, once the hydrogen concentration in steel reaches 5.08 × 10−6 mol/cm3, even the slightest alteration in the hydrogen content will precipitate a dramatic decrease in plasticity. The quantitative relationship formula between the hydrogen concentration and the HE index (FH) in X80 steel can be given as FH=0.029 exp (1.5CH) − 0.029. When the hydrogen concentration in steel is at a maximum, the FH of X80 steel reaches 88.6%. This study provides a reference for analyzing the quantitative relationship between the hydrogen concentration and the HE index in steel after electrochemical hydrogen charging. Full article
(This article belongs to the Special Issue State-of-Art: Metals Failure Analysis)
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