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Salmenjoki H, Papanikolaou S, Shi D, Tourret D, Cepeda-Jiménez CM, Pérez-Prado MT, Laurson L, Alava MJ. Machine learning dislocation density correlations and solute effects in Mg-based alloys. Sci Rep 2023; 13:11114. [PMID: 37429877 DOI: 10.1038/s41598-023-37633-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2023] [Accepted: 06/24/2023] [Indexed: 07/12/2023] Open
Abstract
Magnesium alloys, among the lightest structural materials, represent excellent candidates for lightweight applications. However, industrial applications remain limited due to relatively low strength and ductility. Solid solution alloying has been shown to enhance Mg ductility and formability at relatively low concentrations. Zn solutes are significantly cost effective and common. However, the intrinsic mechanisms by which the addition of solutes leads to ductility improvement remain controversial. Here, by using a high throughput analysis of intragranular characteristics through data science approaches, we study the evolution of dislocation density in polycrystalline Mg and also, Mg-Zn alloys. We apply machine learning techniques in comparing electron back-scatter diffraction (EBSD) images of the samples before/after alloying and before/after deformation to extract the strain history of individual grains, and to predict the dislocation density level after alloying and after deformation. Our results are promising given that moderate predictions (coefficient of determination [Formula: see text] ranging from 0.25 to 0.32) are achieved already with a relatively small dataset ([Formula: see text] 5000 sub-millimeter grains).
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Affiliation(s)
- H Salmenjoki
- Department of Applied Physics, Aalto University, PO Box 11000, 00076, Aalto, Finland
| | - S Papanikolaou
- NOMATEN Centre of Excellence, National Centre for Nuclear Research, A. Soltana 7, 05-400, Otwock-Swierk, Poland
| | - D Shi
- IMDEA Materials Institute, C/ Eric Kandel, 2, Getafe, 28906, Madrid, Spain
| | - D Tourret
- IMDEA Materials Institute, C/ Eric Kandel, 2, Getafe, 28906, Madrid, Spain
| | - C M Cepeda-Jiménez
- Department of Physical Metallurgy, CENIM-CSIC, Avda. Gregorio del Amo 8, 28040, Madrid, Spain
| | - M T Pérez-Prado
- IMDEA Materials Institute, C/ Eric Kandel, 2, Getafe, 28906, Madrid, Spain
| | - L Laurson
- Computational Physics Laboratory, Tampere University, P.O. Box 692, 33014, Tampere, Finland
| | - M J Alava
- Department of Applied Physics, Aalto University, PO Box 11000, 00076, Aalto, Finland.
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Frydrych K, Karimi K, Pecelerowicz M, Alvarez R, Dominguez-Gutiérrez FJ, Rovaris F, Papanikolaou S. Materials Informatics for Mechanical Deformation: A Review of Applications and Challenges. MATERIALS (BASEL, SWITZERLAND) 2021; 14:5764. [PMID: 34640157 PMCID: PMC8510221 DOI: 10.3390/ma14195764] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/07/2021] [Revised: 09/24/2021] [Accepted: 09/27/2021] [Indexed: 11/23/2022]
Abstract
In the design and development of novel materials that have excellent mechanical properties, classification and regression methods have been diversely used across mechanical deformation simulations or experiments. The use of materials informatics methods on large data that originate in experiments or/and multiscale modeling simulations may accelerate materials' discovery or develop new understanding of materials' behavior. In this fast-growing field, we focus on reviewing advances at the intersection of data science with mechanical deformation simulations and experiments, with a particular focus on studies of metals and alloys. We discuss examples of applications, as well as identify challenges and prospects.
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Affiliation(s)
- Karol Frydrych
- NOMATEN Centre of Excellence, National Centre for Nuclear Research, ul. A. Sołtana 7, 05-400 Swierk-Otwock, Poland; (K.F.); (K.K.); (M.P.); (R.A.); (F.J.D.-G.); (F.R.)
| | - Kamran Karimi
- NOMATEN Centre of Excellence, National Centre for Nuclear Research, ul. A. Sołtana 7, 05-400 Swierk-Otwock, Poland; (K.F.); (K.K.); (M.P.); (R.A.); (F.J.D.-G.); (F.R.)
| | - Michal Pecelerowicz
- NOMATEN Centre of Excellence, National Centre for Nuclear Research, ul. A. Sołtana 7, 05-400 Swierk-Otwock, Poland; (K.F.); (K.K.); (M.P.); (R.A.); (F.J.D.-G.); (F.R.)
| | - Rene Alvarez
- NOMATEN Centre of Excellence, National Centre for Nuclear Research, ul. A. Sołtana 7, 05-400 Swierk-Otwock, Poland; (K.F.); (K.K.); (M.P.); (R.A.); (F.J.D.-G.); (F.R.)
| | - Francesco Javier Dominguez-Gutiérrez
- NOMATEN Centre of Excellence, National Centre for Nuclear Research, ul. A. Sołtana 7, 05-400 Swierk-Otwock, Poland; (K.F.); (K.K.); (M.P.); (R.A.); (F.J.D.-G.); (F.R.)
- Institute for Advanced Computational Science, Stony Brook University, Stony Brook, NY 11749, USA
| | - Fabrizio Rovaris
- NOMATEN Centre of Excellence, National Centre for Nuclear Research, ul. A. Sołtana 7, 05-400 Swierk-Otwock, Poland; (K.F.); (K.K.); (M.P.); (R.A.); (F.J.D.-G.); (F.R.)
| | - Stefanos Papanikolaou
- NOMATEN Centre of Excellence, National Centre for Nuclear Research, ul. A. Sołtana 7, 05-400 Swierk-Otwock, Poland; (K.F.); (K.K.); (M.P.); (R.A.); (F.J.D.-G.); (F.R.)
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Learning to Predict Crystal Plasticity at the Nanoscale: Deep Residual Networks and Size Effects in Uniaxial Compression Discrete Dislocation Simulations. Sci Rep 2020; 10:8262. [PMID: 32427971 PMCID: PMC7237459 DOI: 10.1038/s41598-020-65157-z] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2020] [Accepted: 04/22/2020] [Indexed: 01/26/2023] Open
Abstract
The density and configurational changes of crystal dislocations during plastic deformation influence the mechanical properties of materials. These influences have become clearest in nanoscale experiments, in terms of strength, hardness and work hardening size effects in small volumes. The mechanical characterization of a model crystal may be cast as an inverse problem of deducing the defect population characteristics (density, correlations) in small volumes from the mechanical behavior. In this work, we demonstrate how a deep residual network can be used to deduce the dislocation characteristics of a sample of interest using only its surface strain profiles at small deformations, and then statistically predict the mechanical response of size-affected samples at larger deformations. As a testbed of our approach, we utilize high-throughput discrete dislocation simulations for systems of widths that range from nano- to micro- meters. We show that the proposed deep learning model significantly outperforms a traditional machine learning model, as well as accurately produces statistical predictions of the size effects in samples of various widths. By visualizing the filters in convolutional layers and saliency maps, we find that the proposed model is able to learn the significant features of sample strain profiles.
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