Spyros PAPAEFTHYMIOU
Full Professor at the National Technical University of Athens
Prof. Dr.-Ing. Spyros PAPAEFTHYMIOU is a Mining & Metallurgical Engineer. He graduated from the National Technical University of Athens (NTUA: in Greek: “Ethniko Metsovio Polytechnio”) in 2000 and received the academic degree of “Dr.-Ing.” in 2005 from the RWTH Aachen University, Germany. As a researcher in Aachen and in Delft (at the Technical University of Delft, The Netherlands) he focused in Advanced High Strength Steels (AHSS) for the automotive industry, e.g. TRIP (Transformation Induced Plasticity), DP (Dual Phase), CP (Complex Phase) steels. After a more than 10 years professional activity in the Greek Industry he was appointed lecturer in 2014 at the NTUA and launched a consulting activity. In 2015 he was elected and appointed Assistant Professor, in 2020 he was elected and appointed Associate Professor at the Laboratory of Physical Metallurgy, Division of Metallurgy and Materials of the School of Mining & Metallurgical Engineering of the NTUA. Since March 2024 he is appointed Full Professor at the School of Mining & Metallurgical Eng. of the NTUA.
He works in the field of Physical Metallurgy & alloy design and more specifically he is specialized in the microstructure-properties-fracture relationships, in the forming of metals and alloys, in welding and joining and heat treatments, in mechanical properties of materials and in the modelling and simulation of microstructures and materials processing.
He is author of the book “Materials Technology” (in Greek) (ISBN: 978-960-337-129-8, Eugenides Foundation, 2nd Edition 2017) and of a chapter about industrial pipeline welding in a collective book from Springer (Papaefthymiou S. (2021) Industrial Pipeline Welding. In: Davim J. P. (eds) Welding Technology. Materials Forming, Machining and Tribology, Cham. https://doi.org/10.1007/978 – 3 – 030 – 63986 – 0_12). He has published 51 scientific publications in international journals, 45 articles in the proceedings of international conferences with referees, 35 articles in national conferences with referees. Since 2014 he has completed the supervision of 64 Diploma Theses, 4 PhD Theses, he also co-supervised 100 Diploma Theses until today. Additionally, he currently supervises 6 Diploma Theses, 3 PhD Theses and co-supervises 9 PhDs.
He is reviewer in 12 international journals, member of the Technical Camber Greece, former member of the permanent committee of Materials of the Technical Chamber Greece (2006-2009), selected member of the “Verein zur Förderung der Aachener Eisenhüttenkunde e.V. – VAEh (Germany)”, he has been treasurer of the Hellenic Metallurgical Society (2012-2016) and he contributed to the attraction and organisation of the international conference EUROMAT 2017, which took place at Thessaloniki in September 2017.
During the last 10 years in academia he introduces new pedagogic methods into teaching. With a coaching approach he motivates students. Collective learning through projects and workshops enable the familiarization to available digital tools. Students learn to present effectively e.g. according to the "elevator moment", they understand how assessment and evaluation is a vital part of the education process. Working in groups, tackling critical tasks, following tight schedules and adapting to challenges infuses the students with valuable leadership skills.
Furthermore, he is engaged in academia, industry and society working on the target of reaching the Sustainable Development Goals (SDGs). Students, professionals and the wider society must become aware of how important sustainable production is in order to meet critical targets like the zero residuals industrial production, recycling and circularity, reduce emissions and energetically support the twin green and digital transitions in our path towards industry 4.0.
Assoc. Prof. Dr.-Ing. Spyros Papaefthymiou, 2020
Assoc. Prof. Dr.-Ing. Spyros Papaefthymiou was selected by the international journal “Materials” and joined the journal’s “Reviewers Board”, where excellent reviewers are listed in order to acknowledge their assistance in the highly demanding peer review process. In the years 2018 and 2019 he was top 1% reviewer worldwide.
Stand: May 2023
short professional pathway
[03/2024 - today] Full Professor at the NTUA at the School of Mining & Metallurgical Engineering (SMME).
[02/2020 - today] Associate Professor; Metal forming and Welding-Joining technology, NTUA, School of Mining & Metallurgical Engineering (SMME), Division of Metallurgy and Materials, Laboratory of Physical Metallurgy
[07/2015 – 02/2020] Assistant Professor for Metal forming and Welding-Joining technology, NTUA, SMME.
[2015 - today] Business Consultant in industry.
[07/2014] Lecturer of NTUA, SMME; scientific area: Metal forming and Welding-Joining technology
[01/2014 - 9/2014] SIDENOR S.A.; Process & Product Development Manager
[July 2011] Elected Lecturer of the NTUA, School of Mining and Metallurgy. Fields of expertise: a) Metal Forming and b) Welding Technology
[01/2008 - 01/2014] ELKEME S.A. (Hellenic Research Centre for Metals) / VIOHALCO Group / R&D Projects & Steel Physical Metallurgy Coordination Officer
[02/2006 – 09/2007] External co-worker ELKEME S.A., Consulting in micro-alloying of steels
[03/2006 – 12/2006] Scientific co-worker of University of Patras
[07/2006 – 12/2007] MIRTEC S.Ε., R&D and Strategic Development
[06-09/2007] Centre of Research and Development Thessaly Proposal: Platform for Aluminum and Steel in Thessaly
professional membership
Member of the Technical Chamber of Greece, member of the permanent Materials Committee of the Technical Chamber of Greece (2006-2009), selected member of the “Verein zur Förderung der Aachener Eisenhüttenkunde e.V. – VAEh” in Germany, and Treasurer of the Hellenic Metallurgical Society (2012-2016) contributing in the organisation of the international conference EUROMAT 2017, which was held in Thessaloniki in September 2017.
academic activities
book "materials Technology" (gr)
This book entitled “Materials Technology” of S. Papaefthymiou is the updated 2nd Edition of the book “Metallurgy” of P. Petropoulos. The book refers to the students of the second semester of the Schools of Navy & Engineering. The content introduces students in the world of materials in a scientific yet simple way. The content of the book is restricted to the absolute necessary so that the students and all interested readers can focus on the important parts of materials technology in order to build a first holistic approach and knowledge regarding industrial alloys, the selection and utility of materials.
Date of appearance: 2017 (second Edition)
Eugenides Foundation://www.eef.edu.gr/#
DOCTORAL THESIS
selected publications
Marianthi Bouzouni, Evangelos Gavalas, Spyros Papaefthymiou. Modeling the microstructure evolution during quenching & partitioning of a conventional CrMo alloy steel, Computational Materials Science, Volume 206, 2022, 111265, ISSN 0927-0256, Editor’s choice, https://doi.org/10.1016/j.commatsci.2022.111265
Chaskis, S.; Stachouli, E.; Gavalas, E.; Bouzouni, M.; Papaefthymiou, S. Microstructure, Phase Formation and Heat-Treating of Novel Cast Al-Mg-Zn-Cu-Si Lightweight Complex Concentrated Aluminum Based Alloy. Materials 2022, 15, 3169. https://doi.org/10.3390/ma15093169
Banis, A.; Hernandez Duran, E.; Bliznuk, V.; Sabirov, I.; Petrov, R.H.; Papaefthymiou, S. The Effect of Ultra-Fast Heating on the Microstructure, Grain Size and Texture Evolution of a Commercial Low-C, Medium-Mn DP Steel. Metals 2019, 9, 877. https://doi.org/10.3390/met9080877
Papaefthymiou, S.; Banis, A.; Bouzouni, M.; Petrov, R.H. Effect of Ultra-Fast Heat Treatment on the Subsequent Formation of Mixed Martensitic/Bainitic Microstructure with Carbides in a CrMo Medium Carbon Steel. Metals 2019, 9, 312. (https://doi.org/10.3390/met9030312) https://www.mdpi.com/2075-4701/9/3/312
Stavroulakis, P., Toulfatzis, A., Vazdirvanidis, A., Pantazopoulos, G., Papaefthymiou, S.: Investigation of the Aging Behavior of a Cu–Ni–Si Rolled Alloy, Metallography, Microstructure. and Analysis, ASM International. (2019). https://doi.org/10.1007/s13632-019-00531-6
Papaefthymiou, S.; Karamitros, V.; Bouzouni, M. Ultrafast Heating and Initial Microstructure Effect on Phase Transformation Evolution of a CrMo Steel. Metals 2019, 9, 72. https://doi.org/10.3390/met9010072 (https://www.mdpi.com/2075-4701/9/1/72)
Kaban, I.; Agathopoulos, S.; Valenza, F.; Sommitsch, C.; Schenk, J.; Papaefthymiou, S.; Karantzalis, A.: Guest Editorial, Journal of Materials Engineering and Performance (2018)27: 4981. https://doi.org/10.1007/s11665-018-3679-x
Sismanis P.; Papaefthymiou S.: The quest for better structural steels, Civil Eng Res J 6(4): CERJ.MS.ID.555692 (2018), DOI: 10.19080/CERJ.2018.06.555692
Papaefthymiou S., Bouzouni M., Petrov R. H.: Study of Carbide Dissolution and Austenite Formation during Ultra – Fast Heating in Medium Carbon Chromium Molybdenum Steel, Metals(2018), 8, 646; doi:10.3390/met8080646
Papaefthymiou, S. , Goulas, C. , Castro Cerda, F. M., Geerlofs, N. and Petrov, R. (2017), The Effect of Heating Rate on the Microstructure of a Soft‐Annealed Medium Carbon Steel, steel research int., 88: 1700158. doi:10.1002/srin.201700158, editor’s choice & cover page
Papaefthymiou S., Bouzouni M., Gavalas E.: Theoretical study of particle dissolution during homogenization in Cu–Fe–P alloy, Metals 8 (2018) No.6
F Castro Cerda, C Goulas, I Sabirov, S Papaefthymiou, A Monsalve, R.H. Petrov: Microstructure, texture and mechanical properties in a low carbon steel after ultrafast heating, Materials Science and Engineering A 672, 108-120, 2016
FM Castro Cerda, B Schulz, S Papaefthymiou, A Artigas, A Monsalve, Roumen H Petrov: The Effect of Ultrafast Heating on Cold-Rolled Low Carbon Steel: Formation and Decomposition of Austenite, Metals 6 (12), 321, 2016
Stavroulakis P., Toulfatzis A., Vazdirvanidis A., Pantazopoulos G., Papaefthymiou S.: Mechanical behaviour and microstructure of heat-treated Cu–Ni–Si alloy, Materials Science and Technology (2018)
Gavalas E., Pressas I., Papaefthymiou S.: Mesh sensitivity analysis on implicit and explicit method for rolling simulation, International Journal for Structural Integrity (2018)
Athanasopoulos N., Gavalas E., Papaefthymiou S.: Prediction of pipeline collapse due to hydrostatic pressure, International Journal of Structural Integrity (2018)
Sismanis, P., Bouzouni, M., Papaefthymiou, S.: Modeling of Crucial Process Parameters for the Continuous Improvement of Special Steels at the Stomana Plant, Journal of Material Engineering and Performance (2018), Springer US, ISSN 1059-9495. https://doi.org/10.1007/s11665-018-3616-z
Papaefthymiou S., Vazdirvanidis A., Pantazopoulos G., Goulas C.: Fatigue Fracture of a High-Resistance Structural Steel Component Destined to Sustain Severe Loads Under Service Conditions, Journal of Failure Analysis and Prevention17 (2017) No.1, pp.79 – 85.
S Papaefthymiou: A New Opportunity for the Design of Advanced High Strength Steels with Heterogeneous-Phase Microstructures via Rapid Thermal Processing, J Nanosci Adv Tech 2 (1), 20-23, 2017
M Bouzouni, S Papaefthymiou: Modeling of the Steel Microstructure Gained after the Application of an Ultra-Fast Heat Treatment, J Nanosci Adv Tech 2 (1), 15-19, 2017
Papaefthymiou, S.; Goulas, C.; Gavalas, E.: Micro-Friction Stir Welding of Titan Zinc Sheets,
Journal of Materials Processing Technology, http://dx.doi.org/doi:10.1016/j.jmatprotec.2014.08.029, 2014
Papaefthymiou, S.: Root cause analysis of surface and internal defects of micro-alloyed S355 heavy plates, International Journal of Structural Integrity, Emerald Group Publishing Limited 1757-9864, http://dx.doi.org/10.1108/17579861311303654, Vol. 4 No. 1, 2013, pp. 91-107
Teaching
Under GRADUATE courses
“Welding Metallurgy, Technology & Evaluation” for the students of the 8th semester of Materials Science & Technology, SMME, NTUA
“Solidification-Casting and Forming of Metals” for the students of the 9th semester of Materials Science & Technology, SMME, NTUA
Joint teaching
“Historical advances of Mining & Metallurgy” for the students of the 1st semester, SMME, NTUA
“Principles of Nanotechnology & electron microscopy” for the students of the 2nd and 4th semester, SMME, NTUA
“Physical Metallurgy. Exercises” for the students of the 8th semester of Materials Science & Technology, SMME, NTUA
“Powder Metallurgy and 3D Printing” for the students of the 9th semester of Materials Science & Technology, SMME, NTUA
“Fracture and Fatigue ” for the students of the 9th semester of Materials Science & Technology, SMME, NTUA
“Computational Methods in Metallurgy and Materials Science” for the students of the 9th semester of Materials Science & Technology, SMME, NTUA
Previous courses
“Solidification, Casting & Non Destructive Testing” for the students of the 8th semester of Materials Science & Technology, SMME, NTUA
“Metal Forming” for the students of the 9th semester of Materials Science & Technology, SMME, NTUA
POST GRADUATE courses
“Welding” for the MSC “Materials Science & Technology”, NTUA
“Technology of Welded Structures” for the MSc “Automatisation Systems”, NTUA