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Zamani, MohammadrezaORCID iD iconorcid.org/0000-0002-1190-836X
Alternative names
Publications (10 of 18) Show all publications
Zamani, M. & Shahhosseininia, M. (2024). Deformation and strengthening behavior of Al-Cu-based alloys at ambient and elevated temperatures. Academia Materials Science, 1(4)
Open this publication in new window or tab >>Deformation and strengthening behavior of Al-Cu-based alloys at ambient and elevated temperatures
2024 (English)In: Academia Materials Science, E-ISSN 2997-2027, Vol. 1, no 4Article in journal (Refereed) Published
Abstract [en]

Aluminum alloys typically exhibit low to intermediate strength. Heat treatment may improve their strength through precipitation hardening. Al-Cu-based alloys have shown appropriate mechanical properties based on their specific strengthening mechanisms. In this study, the as-cast Al-Cu (Mg-Ag-Ti-B) alloys were prepared at a medium cooling rate of 0.3 mm s−1. All specimens then underwent their specific solution heat treatment and artificial aging cycles. To evaluate the mechanical properties and deformation behavior of each alloy, the tensile test process was conducted at ambient and elevated (250°C) temperatures. For the Al-Cu-Mg-Ag class, the influence of grain size on yield strength (YS) and ultimate tensile strength (UTS) was studied. Fractography, the deformation behavior of each alloy was investigated at fracture surfaces using scanning electron microscopy (SEM). Results revealed that according to the precipitation hardening mechanism, the YS and UTS values were promoted after the heat-treatment procedure, while elongation-tofailure values were reduced compared with as-cast alloys. For elevated testing temperatures, the YS and UTS decreased or remained stable. The value of elongation to failure significantly increased compared to ambient temperature. The fine-grain size of the Al-CuMg-Ag alloy indicated higher values of YS and UTS with a ductile behavior. SEM images illustrated that as-cast and heat-treated AlCu-Mg and Al-Cu-Mg-Ag alloys underwent a brittle deformation with intergranular-transgranular fracture mechanisms at ambient temperature. In contrast, at elevated testing temperatures, some dimples were observed to form. For as-cast and heat-treated Al-Cu and A205 alloys at ambient and elevated temperatures, small dimples with high depth were observed, confirming ductile deformation.

Place, publisher, year, edition, pages
Academia.edu, 2024
Keywords
aluminum alloys, heat-treatment strengthening, precipitates, tensile test, mechanical properties
National Category
Metallurgy and Metallic Materials
Identifiers
urn:nbn:se:hj:diva-66926 (URN)10.20935/AcadMatSci7440 (DOI)GOA;;66926 (Local ID)GOA;;66926 (Archive number)GOA;;66926 (OAI)
Projects
EXTREME project (grant number 2016-04330)
Funder
VinnovaSwedish Research Council FormasSwedish Energy Agency
Available from: 2025-01-08 Created: 2025-01-08 Last updated: 2025-01-08Bibliographically approved
Matsushita, T., Zamani, M., Kump, A. & Jarfors, A. E. .. (2024). Evaluation of the Critical Times for the Crack Susceptibility Coefficient Calculation. International Journal of metalcasting, 18, 1414-1423
Open this publication in new window or tab >>Evaluation of the Critical Times for the Crack Susceptibility Coefficient Calculation
2024 (English)In: International Journal of metalcasting, ISSN 1939-5981, E-ISSN 2163-3193, Vol. 18, p. 1414-1423Article in journal (Refereed) Published
Abstract [en]

The objective of the present study is to evaluate the hot tearing tendency based on the Clyne and Davies model by evaluating the critical times which can be obtained using a newly developed method. A method to determine the critical times required to calculate the crack susceptibility was presented based on the measurement results with Al–Si alloys, and the method to calculate the crack susceptibility coefficient was presented. In the newly developed method named “Signal intensity method,” signals were generated by tapping the edge of a waveguide which is immersed in molten and solidifying sample and the critical solid fractions were obtained from the signal intensity change. The conventional thermal analysis was also performed simultaneously and the corresponding critical points were identified. The method shown in the present study will enable the determination of the crack susceptibility coefficient with higher accuracy.

Place, publisher, year, edition, pages
Springer, 2024
Keywords
aluminium alloys, crack susceptibility coefficient, hot tear, signal intensity, Aluminum alloys, Silicon alloys, Al-Si alloy, Crack susceptibilities, Critical time, Hot tearing, Hot tears, Intensity change, Intensity methods, Signal intensities, Solids fraction, Thermoanalysis
National Category
Materials Engineering
Identifiers
urn:nbn:se:hj:diva-62257 (URN)10.1007/s40962-023-01083-w (DOI)001043356400002 ()2-s2.0-85166987207 (Scopus ID)HOA;;898172 (Local ID)HOA;;898172 (Archive number)HOA;;898172 (OAI)
Funder
Knowledge Foundation, 20180192
Available from: 2023-08-23 Created: 2023-08-23 Last updated: 2025-01-08Bibliographically approved
Ceschini, L., Messieri, S., Morri, A., Seifeddine, S., Toschi, S. & Zamani, M. (2020). Effect of Cu addition on overaging behaviour, room and high temperature tensile and fatigue properties of A357 alloy. Transactions of Nonferrous Metals Society of China, 30(11), 2861-2878
Open this publication in new window or tab >>Effect of Cu addition on overaging behaviour, room and high temperature tensile and fatigue properties of A357 alloy
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2020 (English)In: Transactions of Nonferrous Metals Society of China, ISSN 1003-6326, E-ISSN 2210-3384, Vol. 30, no 11, p. 2861-2878Article in journal (Refereed) Published
Abstract [en]

The aims of the present work are to evaluate the overaging behaviour of the investigated Cu-enriched alloy and to assess its mechanical behaviour, in terms of the tensile and fatigue strength, at room temperature and at 200 °C, and to correlate the mechanical performance with its microstructure, in particular with the secondary dendrite arm spacing (SDAS). The mechanical tests carried out on the overaged alloy at 200 °C indicate that the addition of about 1.3 wt.% Cu to the A357 alloy enables to maintain ultimate tensile strength and yield strength values close to 210 and 200 MPa, respectively, and fatigue strength at about 100 MPa. Compared to the quaternary (Al−Si−Cu−Mg) alloy C355, the A357−Cu alloy has greater mechanical properties at room temperature and comparable mechanical behaviour in the overaged condition at 200 °C. The microstructural analyses highlight that SDAS affects the mechanical behaviour of the peak-aged A357−Cu alloy at room temperature, while its influence is negligible on the tensile and fatigue properties of the overaged alloy at 200 °C. 

Place, publisher, year, edition, pages
Elsevier, 2020
Keywords
A357 alloy, Al−Si−Cu−Mg casting alloy, C355 alloy, fatigue behaviour, high temperature, overaging, tensile property, Fatigue testing, Magnesium alloys, Tensile strength, Thermal fatigue, Mechanical behaviour, Mechanical performance, Microstructural analysis, Overaged conditions, Room and high temperatures, Secondary dendrite arm spacing, Tensile and fatigue properties, Ultimate tensile strength, Copper alloys
National Category
Metallurgy and Metallic Materials
Identifiers
urn:nbn:se:hj:diva-51482 (URN)10.1016/S1003-6326(20)65427-9 (DOI)000601054900001 ()2-s2.0-85098450980 (Scopus ID);JTHMaterialIS (Local ID);JTHMaterialIS (Archive number);JTHMaterialIS (OAI)
Available from: 2021-01-14 Created: 2021-01-14 Last updated: 2021-01-14Bibliographically approved
Zamani, M., Toschi, S., Morri, A., Ceschini, L. & Seifeddine, S. (2020). Optimisation of heat treatment of Al–Cu–(Mg–Ag) cast alloys. Journal of thermal analysis and calorimetry (Print), 139, 3427-3440
Open this publication in new window or tab >>Optimisation of heat treatment of Al–Cu–(Mg–Ag) cast alloys
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2020 (English)In: Journal of thermal analysis and calorimetry (Print), ISSN 1388-6150, E-ISSN 1588-2926, Vol. 139, p. 3427-3440Article in journal (Refereed) Published
Abstract [en]

The optimisation of heat treatment parameters for Al–Cu–(Mg–Ag) cast alloys (2xxx) having different microstructural scales was investigated. Thermo-Calc software was used to design optimal alloy compositions. Differential scanning calorimetry (DSC), scanning electron microscopy and wavelength-dispersive spectroscopy technique were employed to determine proper solution heat treatment temperature and homogenisation time as well as incidence of incipient melting. Proper artificial ageing temperature for each alloy was identified using DSC analysis and hardness measurement. Microstructural scale had a pronounced influence on time and temperature required for complete dissolution of Al2Cu and homogenisation of Cu solute atoms in the α-Al matrix. Refined microstructure required only one-step solution treatment and relatively short solution treatment of 10 h to achieve dissolution and homogenisation, while coarser microstructures desired longer time. Addition of Mg to Al–Cu alloys promoted the formation of phases having a rather low melting temperature which demands multi-step solution treatment. Presence of Ag decreases the melting temperature of intermetallics (beside Al2Cu) and improvement in age-hardening response. Peak-aged temperature is primarily affected by the chemical composition rather than the microstructural scale. 

Place, publisher, year, edition, pages
Springer, 2020
Keywords
Artificial ageing, Cast Al–Cu alloys, Coarseness of microstructure, DSC, Solidification rate, Solution treatment, Thermal treatment, Age hardening, Aluminum alloys, Binary alloys, Copper alloys, Differential scanning calorimetry, Dissolution, Melting point, Microstructure, Scanning electron microscopy, Silver alloys, Wavelength dispersive spectroscopy, Chemical compositions, Cu alloy, Heat treatment parameters, Low melting temperatures, Refined microstructure, Solution treatments, Heat treatment
National Category
Metallurgy and Metallic Materials
Identifiers
urn:nbn:se:hj:diva-46240 (URN)10.1007/s10973-019-08702-x (DOI)000519668200007 ()2-s2.0-85072042594 (Scopus ID)HOA JTH 2020;JTHMaterialIS (Local ID)HOA JTH 2020;JTHMaterialIS (Archive number)HOA JTH 2020;JTHMaterialIS (OAI)
Available from: 2019-09-18 Created: 2019-09-18 Last updated: 2021-01-11Bibliographically approved
Zamani, M., Belov, I., Sjölander, E., Bjurenstedt, A., Ghassemali, E. & Seifeddine, S. (2020). Study on dissolution of Al2Cu in al-4.3cu and a205 cast alloys. Metals, 10(7), 1-17, Article ID 900.
Open this publication in new window or tab >>Study on dissolution of Al2Cu in al-4.3cu and a205 cast alloys
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2020 (English)In: Metals, ISSN 2075-4701, Vol. 10, no 7, p. 1-17, article id 900Article in journal (Refereed) Published
Abstract [en]

Evolution of microstructure in a binary Al-Cu system (Al-4.3Cu) and a commercially alloyed Al-Cu system (A205) during solution heat treatment was investigated using optical microscopy (OM), scanning electron microscopy (SEM), wavelength-dispersive X-ray spectroscopy (WDS), and differential scanning calorimetry (DSC). The diversified coarseness of the microstructure was initiated by controlling the solidification rate. Different solution treatment temperatures were applied to identify a proper solutioning temperature. The larger microstructural scale required an increased solutioning temperature and prolonged holding time to obtain homogenized solutes in the α-Al matrix. The diffusion of Cu primarily controlled the solution heat treatment process. A diffusion-based model was applied and calibrated to determine the dissolution rate of an Al2Cu particle in the matrix. The model operates on a similar time scale with the experimental results for the Al-4.3Cu and A205 alloys with various microstructural scales, different chemical compositions, and at different solution treatment temperatures. Three-dimensional (3D) reconstructed images from SEM images and energy dispersive spectroscopy (EDS) map of elements showed that TiB2 particles shield the Cu-rich phases in the boundaries of α-Al grains, presumably acting as a physical barrier to the diffusion of Cu solutes toward α-Al grains. The model also suggests that the effective diffusion coefficient of Cu in Al, in the presence of TiB2 particles, reduced by a factor of 2.0–2.5 in the A205 alloy compared with the binary Al-Cu alloy.

Place, publisher, year, edition, pages
MDPI, 2020
Keywords
A205, Al-Cu alloy, Diffusion-based model, Solution heat treatment, TiB2 particles
National Category
Materials Engineering
Identifiers
urn:nbn:se:hj:diva-50307 (URN)10.3390/met10070900 (DOI)000557181000001 ()2-s2.0-85088685842 (Scopus ID)GOA JTH 2020 (Local ID)GOA JTH 2020 (Archive number)GOA JTH 2020 (OAI)
Funder
Swedish Energy Agency, 2016-04330,2016-04330,2016-04330,2016-04330
Available from: 2020-08-19 Created: 2020-08-19 Last updated: 2023-10-02Bibliographically approved
Zamani, M., Dini, H., Svoboda, A., Lindgren, L.-E., Seifeddine, S., Andersson, N.-E. & Jarfors, A. (2017). A dislocation density based constitutive model for as-cast Al-Si alloys: Effect of temperature and microstructure. International Journal of Mechanical Sciences, 121, 164-170
Open this publication in new window or tab >>A dislocation density based constitutive model for as-cast Al-Si alloys: Effect of temperature and microstructure
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2017 (English)In: International Journal of Mechanical Sciences, ISSN 0020-7403, E-ISSN 1879-2162, Vol. 121, p. 164-170Article in journal (Refereed) Published
Abstract [en]

The flow stress of an as-cast Al-Si based alloy was modeled using a dislocation density based model. The developed dislocation density-based constitutive model describes the flow curve of the alloy with various microstructures at quite wide temperature range. Experimental data in the form of stress-strain curves for different strain rates ranging from 10−4 to 10−1 s−1 and temperatures ranging from ambient temperature up to 400 °C were used for model calibration. In order to model precisely the hardening and recovery process at elevated temperature, the interaction between vacancies and dissolved Si was included. The calibrated temperature dependent parameters for different microstructure were correlated to the metallurgical event of the material and validated. For the first time, a dislocation density based model was successfully developed for Al-Si cast alloys. The findings of this work expanded the knowledge on short strain tensile deformation behaviour of these type of alloys at different temperature, which is a critical element for conducting a reliable microstructural FE-simulation.

Place, publisher, year, edition, pages
Elsevier, 2017
Keywords
Aluminium cast alloy; Dislocation density; Eutectic phase; Si precipitation; Si solute; Vacancy concentration
National Category
Materials Engineering
Identifiers
urn:nbn:se:hj:diva-27375 (URN)10.1016/j.ijmecsci.2017.01.003 (DOI)000395216300015 ()2-s2.0-85008703756 (Scopus ID)
Note

Finns som manuskript med titeln A Dislocation Density Based Yield Stress Model for as-cast EN AC-46000 Alloy i licentiatuppsats. 

Available from: 2015-06-22 Created: 2015-06-22 Last updated: 2017-12-12Bibliographically approved
Zamani, M. (2017). Al-Si Cast Alloys - Microstructure and Mechanical Properties at Ambient and Elevated Temperatures. (Doctoral dissertation). Jönköping: Jönköping University, School of Engineering
Open this publication in new window or tab >>Al-Si Cast Alloys - Microstructure and Mechanical Properties at Ambient and Elevated Temperatures
2017 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Swedish industry is a global leader in development and manufacture of automotive and aviation components where the usage of aluminium products is remarkable. In addition to manufacturing aluminium components, casting enables low-cost and low-emission production of complex geometry components with a range of sizes. Aluminium with Si as the major alloying element forms a class of alloys representing the most significant fraction of all cast products, for a wide range of applications due to an excellent combination of castability and mechanical properties, as well as good corrosion resistance, wear resistance and recyclability. The microstructure in Al-Si alloys strongly governs their mechanical properties. Several industrial practices such as eutectic modification and alloying are well-known to improve mechanical properties. Al-Si cast alloys generally suffer a lack of ductility and poor high temperature properties due to presence of either brittle or thermally unstable phases. The aim of this work is to study the explicit role of each microstructural constituent on the behaviour of Al-Si cast alloys at room and high temperatures. The results will accordingly highlight the potential for improvement in properties of such alloys.

Casting defects have an immediate and negative effect on the properties of Al-Si alloys and reducing the overall level of defects substantially improves tensile properties. An increased cooling rate refines all microstructural features and reduces volumetric porosity which leads to substantial improvement in tensile properties (e.g. Rm and εF) at any test temperature. Modification of eutectic Si-particles (through Sr-addition) generally has a positive effect on alloy ductility. Depression in eutectic growth temperature as a result of eutectic modification was found to be strongly correlated to the level of modification irrespective of coarseness of the microstructure.

Addition of transition metals (Ni-Ti-Zr-Cr-V) to Al-Si improves tensile strength, particularly at temperatures above 200 ºC caused by formation of thermally stable intermetallic compounds. Below 200 ºC however, a substantial potential for improvement through solute-reinforcement was obtained.

A physically-based constitutive model with a wide validity range was successfully developed to describe the flow behaviour of Al-Si alloys at different temperatures, as a reliable input for finite element simulation. 

Place, publisher, year, edition, pages
Jönköping: Jönköping University, School of Engineering, 2017. p. 66
Series
JTH Dissertation Series ; 21
Keywords
Aluminium cast alloys, eutectic modification, microstructural scale effect, transition metals, room and elevated temperatures tensile properties, physically-based constitutive model.
National Category
Metallurgy and Metallic Materials
Identifiers
urn:nbn:se:hj:diva-35185 (URN)978-91-87289-22-4 (ISBN)
Public defence
2017-04-07, E1405, School of Engineering, Gjuterigatan 5, 10:00 (English)
Opponent
Supervisors
Funder
Knowledge Foundation
Available from: 2017-03-13 Created: 2017-03-10 Last updated: 2017-03-14Bibliographically approved
Zamani, M., Morini, L., Ceschini, L. & Seifeddine, S. (2017). The role of transition metal additions on the ambient and elevated temperature properties of Al-Si alloys. Materials Science and Engineering. A, 693, 42-50
Open this publication in new window or tab >>The role of transition metal additions on the ambient and elevated temperature properties of Al-Si alloys
2017 (English)In: Materials Science and Engineering. A, ISSN 0921-5093, Vol. 693, p. 42-50Article in journal (Other academic) Published
Abstract [en]

The principal aim of the present study was to investigate the effects of small additions of several transition metals (Zr, Ni, Ti, V, Cr, La, Y and Nb) on the microstructure, tensile properties and failure mechanisms of as-cast Al-10Si alloys at ambient and elevated temperatures (200 and 250 °C). Transition metal addition led to the formation of (AlSi)3(TiZr), (AlSi)3(CrVTi), Al13(FeCrVTi)4Si4, (AlSi)3(CrV), Al9FeNi AlNbTiZr, AlSiV, AlSiYLa and AlSiZrTiNb phases which are thermally stable until incipient melting of the eutectic compound occurs. Addition of Zr, Ni, Ti, V and Cr gave a substantial improvement in tensile strength at 250 °C, but at the expense of reduced ductility. The strength of transition metals-containing alloys is strongly governed by the size and morphology rather than the volume fraction of the intermetallic phases formed. Large and irregular particles such as (AlSi)3(TiZr), (AlSi)3(CrVTi), AlNbTiZr and AlSiV provided inhomogeneity in the α-Al matrix and act as the principal source of stress concentration, playing an active role in crack initiation. Crack propagation was primarily controlled by plastic deformation of high cooling rate-refined dendrites and modified eutectic silicon particles.

Place, publisher, year, edition, pages
Elsevier, 2017
Keywords
Alloy development; Aluminum castings alloys; High temperature tensile properties; Microstructure; Thermally stable precipitates
National Category
Materials Engineering
Identifiers
urn:nbn:se:hj:diva-35198 (URN)10.1016/j.msea.2017.03.084 (DOI)000401384400006 ()2-s2.0-85016027369 (Scopus ID)JTHMaterialIS (Local ID)JTHMaterialIS (Archive number)JTHMaterialIS (OAI)
Available from: 2017-03-14 Created: 2017-03-14 Last updated: 2018-09-19Bibliographically approved
Zamani, M. & Seifeddine, S. (2016). Determination of Optimum Sr Level for Eutectic Si Modification in Al–Si Cast Alloys Using Thermal analysis and Tensile Properties. International Journal of metalcasting, 10(4), 457-465
Open this publication in new window or tab >>Determination of Optimum Sr Level for Eutectic Si Modification in Al–Si Cast Alloys Using Thermal analysis and Tensile Properties
2016 (English)In: International Journal of metalcasting, ISSN 1939-5981, E-ISSN 2163-3193, Vol. 10, no 4, p. 457-465Article in journal (Refereed) Published
Abstract [en]

This study presents a correlation between the depression in eutectic growth temperature as a result of Sr modification and the tensile properties of Al–Si cast alloys. In order to study the role that Sr exerts on the solidification behavior, modification and mechanical properties, controlled solidification experiments including thermal analysis were performed. Using three mold materials for different cooling rates, tensile testing was conducted on Al–Si alloys with various Sr levels (~35–500 ppm). The gradient solidification technique was used to produce directionally solidified tensile test specimens containing low levels of defects. The depression in eutectic Si growth temperature was correlated with the Sr additions and the tensile properties (elongation to failure and tensile strength).

Place, publisher, year, edition, pages
Springer, 2016
Keywords
aluminum cast alloys, eutectic modification, thermal analysis, tensile properties
National Category
Metallurgy and Metallic Materials
Identifiers
urn:nbn:se:hj:diva-30660 (URN)10.1007/s40962-016-0032-8 (DOI)000384434100008 ()2-s2.0-84992625153 (Scopus ID)
Available from: 2016-06-20 Created: 2016-06-20 Last updated: 2018-10-16Bibliographically approved
Zamani, M., Amadeh, A. & Lari Baghal, S. M. (2016). Effect of Co content on electrodeposition mechanism and mechanical properties of electrodeposited Ni-Co alloy. Transactions of Nonferrous Metals Society of China, 26(2), 484-491
Open this publication in new window or tab >>Effect of Co content on electrodeposition mechanism and mechanical properties of electrodeposited Ni-Co alloy
2016 (English)In: Transactions of Nonferrous Metals Society of China, ISSN 1003-6326, E-ISSN 2210-3384, Vol. 26, no 2, p. 484-491Article in journal (Refereed) Published
Abstract [en]

Ni-Co coatings with various cobalt contents were electrodeposited from modified Watts bath. The effect of cobalt content on electrodeposition mechanism of the coatings was studied by electro-chemical impedance spectroscopy method (EIS). Surface morphology and crystallographic structure of the coatings were investigated by means of SEM and XRD. Mechanical properties of the coatings were determined using Vickers microhardness and tensile tests. It was found that with increasing the Co2+ ions in electroplating bath, the charge transfer resistance (Rct) of Ni-Co film increased whereas the Warburg impedence decreased. This may be due to enhancement in coverage of cathode surface by Co(OH)2 and higher diffusion rate of metal ions towards cathode surface, respectively. Also, with increasing the cobalt content in the bath, cobalt content in the alloy coating increased anomalously and (111) texture consolidated gradually. With increasing the cobalt content up to 45% in alloy coating, the grain size decreased and consequently, hardness and strength of the alloy increased. Further enhancement of cobalt content up to 55% led to a little decrease in hardness and strength. The maximum ductility was observed for Ni-25%Co coating due to relatively small grain size and compact structure. © 2016 The Nonferrous Metals Society of China.

Keywords
electrodeposition, mechanical properties, microstructure, Ni-Co coating, Cathodes, Charge transfer, Coatings, Cobalt alloys, Corrosion, Electrodes, Grain size and shape, Hardness, Metal cladding, Metal ions, Metals, Nickel, Spectroscopic analysis, Tensile testing, Cathode surface, Charge transfer resistance, Compact structures, Crystallographic structure, Electrodeposition mechanism, Electroplating bath, Small grain size, Vickers microhardness, Cobalt
National Category
Metallurgy and Metallic Materials
Identifiers
urn:nbn:se:hj:diva-30771 (URN)10.1016/S1003-6326(16)64136-5 (DOI)000369696900019 ()2-s2.0-84963948581 (Scopus ID)
Available from: 2016-06-22 Created: 2016-06-22 Last updated: 2017-11-28Bibliographically approved
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ORCID iD: ORCID iD iconorcid.org/0000-0002-1190-836X

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