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Microstructure Characterization, Modelling, and Simulation of Metal Deformation, Damage, and...
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Microstructure Characterization, Modelling, and Simulation of Metal Deformation, Damage, and Failure

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Materials Simulation and Design".

Deadline for manuscript submissions: closed (31 March 2021) | Viewed by 8103

Special Issue Editors

Dr. Giuliano Angella

E-Mail Website
Guest Editor
Chemical Science and Material Technologies, Italian National Research Council, CNR, Rome, Italy
Interests: alloy; steel; cast irons
Special Issues, Collections and Topics in MDPI journals
Dr. Christophe Pinna

E-Mail Website
Guest Editor
Department of Mechanical Engineering, The University of Sheffield, Western Bank, Sheffield S10 2TN, UK
Interests: microstructure characterization; microstructure modelling; damage modelling; finite element modelling; fatigue/fracture; full-field strain measurements
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Production processes, microstructures, and mechanical properties are intimately related, and their relationships have always represented a key issue in the industrial production and application of metals, and materials in general. In fact, metallic materials result in microstructures that are dependent on their physical properties, but also on the different possible production routes, which confer them specific mechanical properties. Metallic materials may also enclose defects that may cause the nucleation and growth of cracks causing premature failure as well as variability in their mechanical properties. Microstructure and mechanical properties therefore have to be characterized with the aim of producing physical-based models to predict their relationship. Models can then be used as tools to assess the quality of metallic materials after production, and can also be successfully implemented in simulations to predict the behavior of metallic engineering components. In this scenario, the characterization, modeling, and simulation of nucleation and the growth of cracks in metallic materials are relevant for two reasons: to improve our understanding of how defects can be significant to the failure of materials, thereby defining a hierarchy of defects useful to assess material quality, and to predict the life/behavior of metallic components during working conditions. Articles and reviews dealing with microstructure characterization and modelling aiming at defining microstructure–properties relationships in terms of deformation, crack nucleation, and growth, with simulation applications, are welcome.

Dr. Giuliano Angella
Dr. Christophe Pinna
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. Materials is an international peer-reviewed open access semimonthly 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 characterization
  • full-field strain measurements
  • microstructure modelling
  • plasticity modelling
  • damage modelling
  • constitutive equations
  • mechanical properties
  • fracture
  • fatigue
  • finite element modelling

Published Papers (3 papers)

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Research

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27 pages, 5609 KiB  
Article
Chunky Graphite in Low and High Silicon Spheroidal Graphite Cast Irons–Occurrence, Control and Effect on Mechanical Properties
by Jon Sertucha, Garikoitz Artola, Urko de La Torre and Jacques Lacaze
Materials 2020, 13(23), 5402; https://doi.org/10.3390/ma13235402 - 27 Nov 2020
Cited by 6 | Viewed by 2241
Abstract
Chunky graphite appears easily in heavy-section spheroidal graphite cast irons and is known to affect their mechanical properties. A dedicated experiment has been developed to study the effect of the most important chemical variables reported to change the amount of chunky graphite, namely [...] Read more.
Chunky graphite appears easily in heavy-section spheroidal graphite cast irons and is known to affect their mechanical properties. A dedicated experiment has been developed to study the effect of the most important chemical variables reported to change the amount of chunky graphite, namely the content in silicon and in rare earths. Quite unexpectedly, controlled rare earths contents appear beneficial for decreasing chunky graphite when using standard charge materials. Tin is shown to decrease chunky graphite appearance and it is evidenced that this effect is not related to rare earths. Finally, the effect of tin and antimony are compared and it is noticed that both suppress chunky graphite but also lead to some spiky graphite when no rare earth is added. Chunky graphite negatively affects the room temperature mechanical properties, though much more in the case of low silicon spheroidal graphite cast irons than in high silicon ones. Spiky graphite has been found to be much more detrimental and should thus be avoided. Full article
(This article belongs to the Special Issue Microstructure Characterization, Modelling, and Simulation of Metal Deformation, Damage, and Failure)
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14 pages, 5681 KiB  
Article
Achievement of High Strength and Ductility in Al–Si–Cu–Mg Alloys by Intermediate Phase Optimization in As-Cast and Heat Treatment Conditions
by Bingrong Zhang, Lingkun Zhang, Zhiming Wang and Anjiang Gao
Materials 2020, 13(3), 647; https://doi.org/10.3390/ma13030647 - 1 Feb 2020
Cited by 14 | Viewed by 2241
Abstract
In order to obtain high-strength and high-ductility Al–Si–Cu–Mg alloys, the present research is focused on optimizing the composition of soluble phases, the structure and morphology of insoluble phases, and artificial ageing processes. The results show that the best matches, 0.4 wt% Mg and [...] Read more.
In order to obtain high-strength and high-ductility Al–Si–Cu–Mg alloys, the present research is focused on optimizing the composition of soluble phases, the structure and morphology of insoluble phases, and artificial ageing processes. The results show that the best matches, 0.4 wt% Mg and 1.2 wt% Cu in the Al–9Si alloy, avoided the toxic effect of the blocky Al2Cu on the mechanical properties of the alloy. The addition of 0.6 wt% Zn modified the morphology of eutectic Si from coarse particles to fine fibrous particles and the texture of Fe-rich phases from acicular β-Fe to blocky π-Fe in the Al–9Si–1.2Cu–0.4Mg-based alloy. With the optimization of the heat treatment parameters, the spherical eutectic Si and the fully fused β-Fe dramatically improved the ultimate tensile strength and elongation to fracture. Compared with the Al–9Si–1.2Cu–0.4Mg-based alloy, the 0.6 wt% Zn modified alloy not only increased the ultimate tensile strength and elongation to fracture of peak ageing but also reduced the time of peak ageing. The following improved combination of higher tensile strength and higher elongation was achieved for 0.6 wt% Zn modified alloy by double-stage ageing: 100 °C × 3 h + 180 °C × 7 h, with mechanical properties of ultimate tensile strength (UTS) of ~371 MPa, yield strength (YS) of ~291 MPa, and elongation to fracture (E%) of ~5.6%. Full article
(This article belongs to the Special Issue Microstructure Characterization, Modelling, and Simulation of Metal Deformation, Damage, and Failure)
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Other

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17 pages, 2136 KiB  
Perspective
Intrinsic and Extrinsic Effects of Microstructure on Properties in Cast Al Alloys
by Murat Tiryakioğlu
Materials 2020, 13(9), 2019; https://doi.org/10.3390/ma13092019 - 25 Apr 2020
Cited by 15 | Viewed by 3016
Abstract
The metallurgy of cast aluminum alloys has always been considered to be different from that of wrought alloys. Metallurgists have been taught that pores are intrinsic in cast aluminum alloys and that mechanical properties in cast aluminum alloys are controlled by dendrite arm [...] Read more.
The metallurgy of cast aluminum alloys has always been considered to be different from that of wrought alloys. Metallurgists have been taught that pores are intrinsic in cast aluminum alloys and that mechanical properties in cast aluminum alloys are controlled by dendrite arm spacing, the presence of Fe-bearing particles, and the size of Si particles in Al–Si alloys, which fracture and debond during deformation, leading to premature failure. Whether these effects are intrinsic or extrinsic, i.e., mere correlations due to the structural quality of castings, is discussed in detail. Ideal properties are discussed, based on findings presented mostly in physics literature. Pores and hot tears in aluminum castings are extrinsic. Moreover, the effect of dendrite arm spacing on elongation, precipitation, and subsequent fracture of β–Al5FeSi platelets, and finally Si particle fracture and debonding are all extrinsic. A fundamental change in how we approach the metallurgy of cast aluminum alloys is necessary. Full article
(This article belongs to the Special Issue Microstructure Characterization, Modelling, and Simulation of Metal Deformation, Damage, and Failure)
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