University of Oulu researchers presenting at the 24th European Conference on Fracture in Zagreb

The prestigious event, organized by the European Structural Integrity Society (ESIS), and hosted by the Faculty of Mechanical Engineering and Naval Architecture at the University of Zagreb, took place in Zagreb, Croatia, from 26-30 August 2024.

Working closely with international academic and industrial partners, the University of Oulu presented a wide range of topics that highlighted the advancements in materials science, fatigue behaviour, and fracture mechanics. The contributions from the university's team included the following presentations in the order of appearance in the schedule:

1. Enhancement of Mechanical Properties of High-Mn TWIP Steel with Fast Heating Process: Insights into Microstructural Evolution and Performance Optimization
   Atef Saad Hamada¹, Ali Khosravifard², Matias Jaskari¹, Antti Järvenpää¹.
   ¹University of Oulu, Finland; ²Shiraz University, Abadeh, Iran.
2. The Effect of Low-Temperature Tempering on Hydrogen Diffusion and Trapping in Direct-Quenched Martensitic Steel
   Renata Latypova¹, Lisa Claeys², Kim Verbeken², Tom Depover², Jukka Kömi¹, Sakari Pallaspuro¹.
   ¹University of Oulu, Finland; ²Ghent University, Belgium.
3. The Effect of Over- and Underloads on Fatigue Limit
   Kimmo Kärkkäinen¹, Joona Vaara²,³, Miikka Väntänen⁴, Mari Åman¹, Tero Frondelius¹,²,³.
   ¹University of Oulu, Finland; ²Wärtsilä, Finland; ³Tampere University, Finland; ⁴Global Boiler Works Oy, Finland.
4. The Microstructure and Fracture Mode of Physically Simulated Heat-Affected Zones of a Weld Metal Used with 500 MPa Offshore Steel – Part 1: Impact Toughness Test Results
   Marcell Gáspár¹, Judit Kovács¹, Henri Tervo², Antti Kaijalainen², Vahid Javaheri², Johannes Sainio³, Jukka Kömi².
   ¹Institute of Materials Science and Technology, University of Miskolc, Hungary; ²University of Oulu, Finland; ³SSAB Europe, Finland.
5. The Microstructure and Fracture Mode of Physically Simulated Heat-Affected Zones of a Weld Metal Used with 500 MPa Offshore Steel – Part 2: Fractographies, Inclusions, and Microstructures
   Henri Tervo¹, Marcell Gáspár², Judit Kovács², Antti Kaijalainen¹, Vahid Javaheri¹, Johannes Sainio³, Jukka Kömi¹. ¹University of Oulu, Finland; ²University of Miskolc, Hungary; ³SSAB Europe, Finland.
6. Anisotropy of Gyroid and Stochastic Lattice Structures under Tensile Loading
   Presented by Antti Viljami Järvenpää¹, Miguel Araya², Timo Rautio¹.
   ¹University of Oulu, Finland; ²Instituto Tecnológico de Costa Rica, Costa Rica.
7. Optimization of TMCP Parameters to Improve Mechanical Properties in 201LN Stainless Steel for Cryogenic Applications
   Ahmed W. Abdelghany¹,², Sumit Ghosh², Tun Tun Nyo², Ali Smith³, Frank Hoffmann⁴, Marta Muratori⁵, Mahesh Mahesh².
   University of Oulu, Kerttu Saalasti Institute, Finland; ²University of Oulu, Finland; ³Rina Consulting-Centro Sviluppo Materiali SpA, Italy; ⁴Technische Universität Bergakademie Freiberg, Germany; ⁵Acerinox Europa S.A.U., Spain.
8. Enhancing Fatigue Behaviour of PBF-LB IN718 Through Surface Quality Optimization
   Matias Jaskari¹, Timo Rautio¹, Antti Järvenpää¹.
   ¹University of Oulu, Finland.
9. Fracture Toughness of Low- and Medium-Carbon Martensitic-Austenitic Steels and Their Welds
   Sakari Pallaspuro¹, Sebastian Lindqvist², Ann-Christin Hesse³, Tamás Tóth³, Johannes Sainio¹, Niko Aho¹, Sumit Ghosh¹, Jukka Kömi¹.
   ¹University of Oulu, Finland; ²VTT Technical Research Centre of Finland, Finland; ³TU Braunschweig, Germany.
10. 10. Employing a Continuum Damage Model to Predict the Fatigue Life through ABAQUS
    Mohammad Hossein Jalaei¹, Sofia Pelizzoni², Giovanni Meneghetti², Alberto Campagnolo², Niels Saabye Ottosen³, Matti Ristinmaa³, Joona Vaara⁴, Tero Frondelius⁴,⁵, Reijo Kouhia¹.
    ¹Tampere University, Finland; ²University of Padova, Italy; ³Lund University, Sweden; ⁴Wärtsilä Marine Solutions, Finland; ⁵University of Oulu, Finland.
11. Comparative Analysis of High-Cycle Fatigue Behavior and Failure Mechanisms in Ultrahigh-Strength CrNiMoWMnV Steels
    Atef Saad Hamada¹, Mohammed Ali¹, Sumit Ghosh¹, Matias Jaskari¹, Tarek Allam², Ruth Schwaiger², Mamdouh Eissa³, Taha Mattar⁴.
    - ¹University of Oulu, Finland; ²Forschungszentrum Jülich, Germany; ³Central Metallurgical Research and Development Institute, Egypt; ⁴Galala University, Egypt.
12. Alloying Impacts on Austenite Stability and Fatigue Crack Propagation in Medium Carbon Direct Quenched and Partitioned Steels
    Sumit Ghosh¹, Gaurav Kumar², Sakari Pallaspuro¹, Mahesh Somani¹, Sushil Mishra², Amol Gokhale², Jukka Kömi¹. ¹University of Oulu, Finland; ²Indian Institute of Technology Bombay, India.
13. Dual Nature of Retained Austenite on Mechanical Properties of Advanced High Strength Steels with and without Hydrogen
    Vahid Javaheri¹, Ehsan Ghassemali², Roohallah Surki Aliabad¹, Sumit Ghosh¹, Saeed Sadeghpour¹, Jukka Kömi¹.
    ¹University of Oulu, Finland; ²Jönköping University, Sweden.
14. Gas Tungsten Arc Welding of Low Carbon Steel with Ni-Cr and Medium Mn Stainless Steels
    Mahmoud Khedr¹,², I. Reda Ibrahim²,³, Tamer Mahmoud², Atef Hamada¹.
    ¹University of Oulu, Finland; ²Benha University, Egypt; ³Southern Methodist University, USA.
15. Influence of GTAW and SMAW Techniques on the Mechanical Behavior of S275JR Low Carbon Manganese Steel Welded Joints
    Presented by Mahmoud Khedr¹,², Ahmed Abdelghany¹, Hamed Abdelalim³, Ahmed Gaafer², I. Reda Ibrahim⁴.
    ¹University of Oulu, Finland; ²Benha University, Egypt; ³Central Metallurgical R&D Institute, Egypt; ⁴Southern Methodist University, USA.
16. Indentation Behavior of Additively Manufactured 316L Stainless Steel Welded by Tungsten Inert Gas and Laser Welding Techniques
    Mohamed Elsayed², Mahmoud Khedr¹, Antti Järvenpää¹, Ahmed Gaafer², Atef Hamada¹.
    ¹University of Oulu, Finland; ²Benha University, Egypt.

The conference provided a platform for our researchers to engage with the global scientific community, fostering collaboration and the exchange of knowledge on materials science and engineering.

Photo caption: From right to left: Sakari, Vahid, Sumit, Matias, Mahmoud, Renata, Henri, Ahmad; Seated from right to left: Atef, Antti, Kimmo.

We congratulate our teams for their remarkable contributions and for representing the University of Oulu on such an international stage and thanks all our financial funders!