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Metals
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Mechanical Behavior of Metallic Materials in Extreme Environments
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Mechanical Behavior of Metallic Materials in Extreme Environments

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

Deadline for manuscript submissions: closed (31 March 2022) | Viewed by 7109

Special Issue Editor

Prof. Dr. Ezio Cadoni

E-Mail Website1 Website2
Guest Editor
DynaMat SUPSI Laboratory, University of Applied Sciences and Arts of Southern Switzerland, 6850 Mendrisio, Switzerland
Interests: high strain-rate; impact; experimental mechanics; crash worthiness; protection; concrete; UHPC; metals; composite; split Hopkinson bar technologies

Special Issue Information

Many technological and industrial fields, e.g., the manufacturing, machining, aerospace, and construction sectors, operate in extreme environments where metals are used under challenging temperature, and radiation, corrosion conditions. Several loading conditions (high strain-rate, fatigue, creep) are present, and extreme environments strongly affect the mechanical responses that occur. Understanding the influence of extreme conditions on the mechanical behaviour of metals is a challenge in materials research that is of capital importance to ensure the safety and functionality of systems and applications. 

For this Special Issue, we aim to include a collection of reviews and research articles on topics from the field of metal mechanical behaviour under extreme environments. This includes research related to the strength, ductility, and fracture of metals across a wide range of temperatures, from cryogenic to high, as well as studies on fracture and fatigue and strain-rate sensitivity at low to high strain rates associated with temperature and radiation. We welcome studies on the above subjects using either experimental or theoretical approaches with particular emphasis on industrial applications.

Prof. Dr. Ezio Cadoni
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

  • extreme environments
  • strength
  • ductility
  • fracture
  • fatigue
  • strain-rate
  • temperature
  • corrosion
  • radiation
  • plasticity

Published Papers (3 papers)

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Research

25 pages, 15066 KiB  
Article
Extended Stress–Strain Characterization of Automotive Steels at Dynamic Rates
by Giuseppe Mirone, Raffaele Barbagallo, Michele Maria Tedesco, Daniele De Caro and Matteo Ferrea
Metals 2022, 12(6), 960; https://doi.org/10.3390/met12060960 - 2 Jun 2022
Cited by 7 | Viewed by 1500
Abstract
Demanding structural applications require a detailed knowledge of the materials response up to the very late stages before failure. Ductile high-strength steels may undergo pronounced necking over the majority of their straining life; this makes a reliable stress–strain characterization difficult, especially at dynamic [...] Read more.
Demanding structural applications require a detailed knowledge of the materials response up to the very late stages before failure. Ductile high-strength steels may undergo pronounced necking over the majority of their straining life; this makes a reliable stress–strain characterization difficult, especially at dynamic rates, because the self-heating from fast adiabatic dissipation may promote thermal effects interplaying with the strain rate effects. Further complications arise in deriving the postnecking flow curves when the material is a metal sheet due to geometrical issues intrinsic in the prismatic flat shape of the specimens. This paper focuses on the experimental derivation of the flow curves of DP1000 and MS1700 steels at strain rates ranging from 1 to 500/s. In addition, the moderately high temperatures achieved due to the self-heating at dynamic rates are imposed at static rates for separately investigating thermal and dynamic effects. Digital Image Correlation (DIC) and pixel counting optical techniques are used together with postprocessing procedures based on standard criteria and on physical considerations proposed by the authors. The resulting hardening curves are compared to each other and the advantages of the proposed method are discussed. Full article
(This article belongs to the Special Issue Mechanical Behavior of Metallic Materials in Extreme Environments)
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21 pages, 6682 KiB  
Article
Numerical Modeling of Shockwaves Driven by High-Energy Particle Beam Radiation in Tungsten-Made Structures
by Martina Scapin and Lorenzo Peroni
Metals 2022, 12(4), 670; https://doi.org/10.3390/met12040670 - 14 Apr 2022
Viewed by 1784
Abstract
The investigation of wave propagation in solids requires the development of reliable methods for the prediction of such dynamic events in which the involved materials cover wide ranges of different possible states, governed by plasticity, equation of state, and failure. In the present [...] Read more.
The investigation of wave propagation in solids requires the development of reliable methods for the prediction of such dynamic events in which the involved materials cover wide ranges of different possible states, governed by plasticity, equation of state, and failure. In the present study, the wave propagation in metals generated by the interaction of high-energy proton beams with solids was considered. In this condition, axisymmetric waves were generated, and, depending on the amount of the delivered energy, different regimes (elastic, plastic, or shock) can be reached. Nonlinear numerical analyses were performed to investigate the material response. The starting point was the energy map delivered into the component as the consequence of the beam impact. The evolution of both hydrodynamic and mechanical quantities was followed starting from the impact and the effects induced on the hit component were investigated. The results showed the portion of the component close to the beam experiences pressure and temperature increase during the deposition phase. The remaining part of the component is traversed by the generated shockwave, which induces high values of strain in a short time or even the failure of the component. Full article
(This article belongs to the Special Issue Mechanical Behavior of Metallic Materials in Extreme Environments)
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27 pages, 7807 KiB  
Article
Synchronized Full-Field Strain and Temperature Measurements of Commercially Pure Titanium under Tension at Elevated Temperatures and High Strain Rates
by Guilherme Corrêa Soares and Mikko Hokka
Metals 2022, 12(1), 25; https://doi.org/10.3390/met12010025 - 23 Dec 2021
Cited by 4 | Viewed by 2749
Abstract
Understanding the mechanical behavior of materials at extreme conditions, such as high temperatures, high strain rates, and very large strains, is fundamental for applications where these conditions are possible. Although tensile testing has been used to investigate material behavior under high strain rates [...] Read more.
Understanding the mechanical behavior of materials at extreme conditions, such as high temperatures, high strain rates, and very large strains, is fundamental for applications where these conditions are possible. Although tensile testing has been used to investigate material behavior under high strain rates and elevated temperatures, it disregards the occurrence of localized strains and increasing temperatures during deformation. The objective of this work is to combine synchronized full-field techniques and an electrical resistive heating system to investigate the thermomechanical behavior of commercially pure titanium under tensile loading at high temperatures and high strain rates. An electrical resistive heating system was used to heat dog-bone samples up to 1120 °C, which were then tested with a tensile Split Hopkinson Pressure Bar at strain rates up to 1600 s−1. These tests were monitored by two high-speed optical cameras and an infrared camera to acquire synchronized full-field strain and temperature data. The displacement and strain noise floor, and the stereo reconstruction error increased with temperature, while the temperature noise floor decreased at elevated temperatures. A substantial decrease in mechanical strength and an increase in ductility were observed with an increase in testing temperature. The localized strains during necking were much higher at elevated temperatures, while adiabatic heating was much lower or non-existent at elevated temperatures. Full article
(This article belongs to the Special Issue Mechanical Behavior of Metallic Materials in Extreme Environments)
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