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Metals
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Hardening Behavior of Deformed Steel and Alloys
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Hardening Behavior of Deformed Steel and 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 January 2022) | Viewed by 5242

Special Issue Editor

Prof. Dr. Hoon Huh

E-Mail Website
Guest Editor
Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology, Daejeon, Korea
Interests: dynamic hardening behavior of materials; strain-rate-dependent tension/compression behavior of metals; strain-rate-dependent crash analysis of structures; reference standardization of tensile properties of metals; ductile fracture of materials; hardening behavior and fracture of metals at ultra-high strain-rates

Special Issue Information

Dear Colleagues,

I trust this finds you well and that you and your families are doing well during these unprecedented times of the COVID-19 pandemic.

It is my pleasure to announce that we are organizing a Special Issue on ‘Hardening Behavior of Deformed Steel and Alloys in Metals’, and I would like to invite you to submit your work. The Special Issue will deal with:

  1. Static and dynamic hardening behavior of materials;
  2. Experimental techniques, methods, and diagnostics for constitutive response of hardening materials in the static and dynamic regime;
  3. Hybrid experimental–computational methods to identify the hardening behavior of materials;
  4. Evaluation of hardening behavior of materials in the forming process;
  5. Strain-rate dependent tension–compression hardening behavior or repeated tension–compression behavior of metals;
  6. Assessment of strain-rate-dependent crash worthiness of structures with hardening behavior;
  7. Material and structural response to dynamic loading such as high strain-rate, impact, blast, penetration, shock response, and extreme conditions;
  8. Ultra-high, high, or moderate strain-rate hardening behavior and ductile or brittle fracture of metals;
  9. All experimental and theoretical approaches to hardening behavior of materials.

As we all know, the hardening behavior of materials is one of the most important pieces of information because their understanding is the first step toward analysis and assessment of fabrication and structures. I personally hope that this Special Issue becomes very successful and your contribution and support is indispensable for its success.

With best wishes and regards,

Prof. Dr. Hoon Huh
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

  • hardening behavior
  • strain-rate dependency
  • constitutive response
  • tension–compression hardening behavior
  • material and structural response to dynamic loading
  • hardening behavior and fracture of metals

Published Papers (2 papers)

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Research

17 pages, 7760 KiB  
Article
Dynamic Hardening of AISI 304 Steel at a Wide Range of Strain Rates and Its Application to Shot Peening Simulation
by Sungbo Lee, Kwanghyun Yu, Hoon Huh, Radek Kolman and Xavier Arnoult
Metals 2022, 12(3), 403; https://doi.org/10.3390/met12030403 - 25 Feb 2022
Cited by 8 | Viewed by 2205
Abstract
The hardening behavior of AISI 304 steel is investigated at various strain rates, from the quasi-static state to ultra-high strain rates, because it is necessary for numerical simulation of high-speed deformation problems. This kind of testing at a wide range of strain rates [...] Read more.
The hardening behavior of AISI 304 steel is investigated at various strain rates, from the quasi-static state to ultra-high strain rates, because it is necessary for numerical simulation of high-speed deformation problems. This kind of testing at a wide range of strain rates has not been yet reported in the literature although it is indispensable for accurate numerical analyses where deformation takes place with a wide spectrum of strain rates. AISI 304 steel is a kind of austenitic stainless steel used in various engineering fields, which does not harden by heat treatment, but by cold working such as shot peening. In order to obtain hardening properties at each strain rate, tensile tests were carried out using a universal testing machine of the INSTRON 5583 for the quasi-static state, a high speed material testing machine of a servo-hydraulic type for intermediate strain rates, and a tensile split-Hopkinson bar for high strain rates with a digital image correlation method. The hardening properties at the ultra-high strain-rate region were obtained from Taylor impact test results by calibration with an experimental–numerical hybrid inverse optimization for reliable extrapolation results. Finally, the hardening flow stress curves were obtained at various strain rates from the quasi-static state to ultra-high strain rates by interpolating the data with the extended Lim–Huh model. The result shows that the yield stress of 759 MPa at the quasi-static state increased to 1429 MPa at a strain rate of 106 s−1, which is about 1.9 times of the quasi-static yield stress. As a demonstration example, the dynamic hardening properties obtained were applied to a shot peening simulation that required hardening curves at a wide range of strain rates from the static state to 106 s−1. The simulation result with the dynamic hardening properties is compared to that with the quasi-static properties. The comparison shows a notable difference in the maximum compressive residual stress by 32%, demonstrating that it is important to consider the dynamic hardening properties in such high strain rate simulation as shot peening for accurate simulation results. Full article
(This article belongs to the Special Issue Hardening Behavior of Deformed Steel and Alloys)
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13 pages, 3308 KiB  
Communication
Influence of Hot Deformation on the Precipitation Hardening of High-Strength Aluminum AA7075 during Thermo-Mechanical Processing
by Emad Scharifi, Daria Shoshmina, Stefan Biegler, Ursula Weidig and Kurt Steinhoff
Metals 2021, 11(5), 681; https://doi.org/10.3390/met11050681 - 21 Apr 2021
Cited by 9 | Viewed by 2358
Abstract
The aim of this work was to investigate the effect of hot deformation on the aging behavior of precipitation-hardenable aluminum alloy AA7075 within a novel thermo-mechanical forming process, in order to gain insight into its precipitation kinetics. For this purpose, the material was [...] Read more.
The aim of this work was to investigate the effect of hot deformation on the aging behavior of precipitation-hardenable aluminum alloy AA7075 within a novel thermo-mechanical forming process, in order to gain insight into its precipitation kinetics. For this purpose, the material was formed at 420 °C after undergoing solution treatment to different strain levels ranging from 2% to 10% to obtain different dislocation densities. After undergoing hot deformation, aging at 120 °C with different parameters was carried out to improve the material hardness. The resulting material properties and microstructure evolution were characterized afterward using hardness measurements and a transmission electron microscope (TEM). TEM investigations revealed the formation of very fine particles for the material formed at 2%, as well as at 10%, of formed material, which act as effective barriers to dislocation motion. It was found that the response of artificial aging on the deformation degree in hot forming was less than expected due to the thermally activated mechanisms, leading to a decrease in dislocation density. Therefore, a dramatic increase in material hardness with the increase in hot deformation was not observed. Full article
(This article belongs to the Special Issue Hardening Behavior of Deformed Steel and Alloys)
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