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Metals
Special Issues
Crystal Plastic Deformation Mechanism of Metallic Materials
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Crystal Plastic Deformation Mechanism of Metallic Materials

A special issue of Metals (ISSN 2075-4701). This special issue belongs to the section "Crystallography and Applications of Metallic Materials".

Deadline for manuscript submissions: closed (30 September 2022) | Viewed by 5511

Special Issue Editors

Prof. Dr. Mao Liu

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Guest Editor
School of Metallurgy, Northeastern University, Shenyang 110819, China
Interests: superplasticity; grain refinement; work hardening; plasticity; crystal plasticity FEA; mechanics of materials; microstructure evolutions; steels
Dr. Pengfei Wang

E-Mail Website
Guest Editor
Department of Modern Mechanics, University of Science and Technology of China, Chengdu 610056, China
Interests: multi-scale dynamics experimental technology; coupling mechanism and constitutive theory of material temperature/strain rate; dynamic properties of new fiber composite materials and their microstructure design
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Jhe-Yu Lin

E-Mail Website
Guest Editor
Department of Mechanical Engineering, National Taipei University of Technology, Taipei, Taiwan
Interests: severe plastic deformation; solid-state bonding; microstructure characterization at dissimilar metal interface; grain refinement
Dr. Liang Zhang

E-Mail Website
Guest Editor
College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China
Interests: computational materials; atomistic simulation; metals and alloys; nanomaterials; mechanics of materials; strength and ductility; grain boundary; dislocation
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Crystal plasticity is an inherently multiscale process starting at the atomic scale where dislocation cores, the regions in the immediate vicinity of dislocation lines, control a number of local properties, including the selection of glide planes and corresponding dislocation mobility, cross-slip, and nucleation processes. Crystal plasticity, in contrast to classical macroscopic plasticity, has a clear physical basis and always includes explicit microscopic information of the material, such as geometrical definition of the active slip systems. Crystal plasticity theory has long been adopted to study deformation behaviors of metallic materials subjected to both quasi-static and dynamic plastic deformation, such as ARB, ECAP, HPT, impact, indentation, etc. Both numerical modelling methods (e.g., crystal plasticity FEA) and cutting-edge experimental characterization technologies (e.g., EBSD and TEM) have been developed to further study the crystal plasticity theory.

Our Special Issue aims to provide a timely review of research in the rapidly developing subject area of crystal plasticity. We would like to invite you to submit either research articles or review papers to the Special Issue. Specific topics of interests include (but are not limited to): microstructure and texture evolutions, design and processing of metallic materials, phase transformations and mechanical properties, deformation mechanism, dynamic mechanics, numerical modeling, dynamic recrystallizations, and 3D printing and corrosion.

Prof. Dr. Mao Liu
Prof. Dr. Pengfei Wang
Prof. Dr. Jhe-Yu Lin
Prof. Dr. Liang Zhang
Guest Editors

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

  • Crystal plasticity
  • Deformation mechanism
  • Physical metallurgy
  • Metallic materials
  • Metal forming
  • Numerical modeling
  • Severe plastic deformation
  • Grain refinement
  • Dynamic recrystallization
  • Joining and welding

Published Papers (3 papers)

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Research

11 pages, 4078 KiB  
Article
Grain Boundary Migration as a Self-Healing Mechanism of Tungsten at High Temperature
by Ruxin Zheng, Liuqing Yang and Liang Zhang
Metals 2022, 12(9), 1491; https://doi.org/10.3390/met12091491 - 08 Sep 2022
Cited by 2 | Viewed by 1482
Abstract
The tungsten components in nuclear fusion reactors need to withstand the radiation cascade damage caused by the neutron bombardment of high temperature and high throughput fusion reaction during service. These damages are mainly present as a high concentration of point defects and clusters, [...] Read more.
The tungsten components in nuclear fusion reactors need to withstand the radiation cascade damage caused by the neutron bombardment of high temperature and high throughput fusion reaction during service. These damages are mainly present as a high concentration of point defects and clusters, which lead to a series of problems such as irradiation-hardening and decreased thermal conductivity of materials. In this study, molecular dynamics simulations are carried out to study the dynamic interaction between grain boundaries and the void in tungsten at high temperatures (T > 2500 K). Different interatomic potentials of W were tested, and the most appropriate one was selected by the thermodynamic and kinetic properties of W. Simulation results show that the dynamic migration of grain boundary can absorb the void, but the absorption efficiency of grain boundaries is sensitive to their structural characteristics, where the high-angle GBs are more absorptive to the void than the low-angle GBs. It is found that the void absorption cannot be completely attributed to the thermal diffusion mechanism during the GB-void interaction; the dynamic migration of high-angle GBs can significantly accelerate the void absorption. This study reveals a GB migration-induced self-healing mechanism of W at high temperatures. Full article
(This article belongs to the Special Issue Crystal Plastic Deformation Mechanism of Metallic Materials)
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12 pages, 12669 KiB  
Article
Hot Deformation Behavior of an As-Extruded Mg-2.5Zn-4Y Alloy Containing LPSO Phases
by Guoxin Wang, Pingli Mao, Zhi Wang, Le Zhou, Feng Wang and Zheng Liu
Metals 2022, 12(4), 674; https://doi.org/10.3390/met12040674 - 14 Apr 2022
Cited by 1 | Viewed by 1294
Abstract
The hot deformation and dynamic recrystallization (DRX) characteristics of an as-extruded Mg-2.5Zn-4Y alloy containing long-period stacking ordered (LPSO) phases were investigated using a Gleeble 3500 thermal simulator at temperatures (300–400 °C) and strain rates (0.001–1 s−1). The results revealed that low flow stress [...] Read more.
The hot deformation and dynamic recrystallization (DRX) characteristics of an as-extruded Mg-2.5Zn-4Y alloy containing long-period stacking ordered (LPSO) phases were investigated using a Gleeble 3500 thermal simulator at temperatures (300–400 °C) and strain rates (0.001–1 s−1). The results revealed that low flow stress corresponded to a high temperature and a low strain rate. An increase in the temperature of deformation caused an increase in the amount of dynamic recrystallization. Additionally, as the strain rate decreased at a given deformation temperature, dislocations were less likely to cause pile-up and dynamic recrystallization was more appropriate, resulting in a lower stress value. Kink deformation was clearly minimized as the number of dynamic recrystallizations increased. The test alloy’s activation energy value was determined as 212.144 kJ/mol. Full article
(This article belongs to the Special Issue Crystal Plastic Deformation Mechanism of Metallic Materials)
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12 pages, 6170 KiB  
Article
Hot-Deformation Behavior and Processing Maps of a Low-Carbon Fe-2 wt% Nb Steel
by Wentao Luo, Pengzhan Cai, Ziyong Hou, Yuhui Wang, Ling Zhang and Guilin Wu
Metals 2021, 11(12), 1939; https://doi.org/10.3390/met11121939 - 30 Nov 2021
Cited by 4 | Viewed by 1465
Abstract
In the present work, the deformation behavior and processing maps of a low-carbon Fe-2 wt% Nb steel were studied by means of hot-compression tests at temperatures of 800–1150 °C and strain rates of 0.01–10 s−1. The hot-processing maps at different strains [...] Read more.
In the present work, the deformation behavior and processing maps of a low-carbon Fe-2 wt% Nb steel were studied by means of hot-compression tests at temperatures of 800–1150 °C and strain rates of 0.01–10 s−1. The hot-processing maps at different strains and corresponding microstructural evolution were constructed and discussed. The hot-deformation behaviors of two different phase regions, i.e., austenite + NbC dual-phase and ferrite + NbC dual-phase, were predicted by determining the constitutive equations using Arrhenius-type and Zener–Hollomon models. The results suggest that the hot-deformed microstructures of the material present a strong correlation with the processing parameters in the hot-processing maps. In addition, the optimum parameters based on the processing maps were obtained, and the instable and the safe domains during the hot deformation in the hot-processing maps provide solid theoretical guidance for industrial production. Full article
(This article belongs to the Special Issue Crystal Plastic Deformation Mechanism of Metallic Materials)
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