Seminar

13^th TWC International Wear Seminar
Tribological Challenges in Industrial Applications
May 24^th 2022 at 12:00-16:15 (UTC+2, Finnish time)
Free online webinar

The webinar jointly organized by Tampere Wear Center and PerforMat network is dealing with interactions of tribological contacts and material behavior as well as condition monitoring. The first session is focusing on fretting induced friction, wear, and cracking. The second session is concentrating on condition monitoring of wind turbines as well as its component testing and lubrication. The main speakers are Professor David Nowell, Imperial College London, UK, and Dr Soha Baydoun, Ecole Centrale de Lyon, France.

The webinar is free of charge and arranged on-line (Zoom). The participation link and the recording of the webinar will be sent for the registered participants.

Program

12.00 Opening, Professor Arto Lehtovaara, Tampere University

12.05 The Importance of Friction and Wear in Understanding Interface Behaviour, Professor David Nowell, Imperial College London, UK

12.35 Investigation of fretting wear of a flat-on-flat 34NiCrMo16 interface: Application and modelling of the contact oxygenation concept, Soha Baydoun, Ecole Centrale de Lyon, France

13.05 Role of friction in fretting damage process, Janne Juoksukangas, Tampere University. Read more: Juoksukangas, J., et al. 2020. Avoiding the initial adhesive friction peak in fretting, Wear 460–461:203353, https://doi.org/10.1016/j.wear.2020.203353 (open access)

13.30 Connecting rod dimensioning against fretting, Antti Mäntylä, Wärtsilä

Break

14.30 Opportunities of predictive maintenance in wind power production, Jaakko Kleemola, Hyötytuuli

14.55 Innovative hybrid testing methods for components in wind turbines, Helena Ronkainen, VTT Technical Research Centre of Finland Ltd. Read more: Technological approach – INNTERESTING (innterestingproject.eu)

15.20 Tribofilm evolution in simulated gear contact, Reza Bayat, Tampere University. Read more: Evaluation of Gear Oils Lubrication Performance in a Rolling/Sliding Contact, Tampere University Dissertations 582.

15.45 AI-based condition monitoring of hydraulic pitch system in wind turbines, Panagiotis Korkos, Tampere University

16.10 Ending of the seminar

Academy of Finland logo

Contacts

Arto Lehtovaara

Professor
tribology and machine elements
Faculty of Engineering and Natural Sciences
Tampere University
+358408254220
arto.lehtovaara@tuni.fi

https://orcid.org/0000-0003-2548-3128

More information

About me

My research focus is on tribology, which investigates the friction, wear and lubrication of contacting surfaces as well as related fundamental failure mechanisms. This gives basis to provide advanced tribological expertise and solutions for developing future design concepts for machine elements and frictional joints to improve their performance, service life and operation monitoring. This work is done with close collaboration with industry using high standard numerical and experimental methods. Main current research interests are fretting induced friction, wear and fatigue in frictional joints as well as lubricated rolling/sliding contacts in gears and bearings related to combustion engines, mineral crushers and gear drives in wind turbines and marine applications. Advanced tribological contact design improves energy efficiency, power density and reliability of machine elements and systems having essential contribution to Finnish industrial competiveness and sustainable development.

Research topics

Tribology (friction, wear and lubrication) and tribological machine elements in general - focusing on

- Fretting induced friction, wear and fatigue in frictional joints

- Lubricated rolling/sliding contacts in machine elements such as gears and bearings

Research unit

Materials Science and Environmental Engineering

Research career

Professor, Materials Science, Tribology and Machine Elements, 2014 –

Professor, TUT, Machine Design, Mechanical Power Transmission and Tribology, 1999 –2013

Docent – Tribology, TUT, 1997-2002

R&D and Project Manager in private sector 1989-1996

Dr. Tech., TUT (Tampere University of Technology), 1989

Main positions of trust

Selected publications

Bayat R., Lehtovaara A., EHL/mixed transition of fully formulated environmentally acceptable gear oils, Tribology International 146 (2020) 12 p., 106158.

Hintikka J., Mäntylä A., Vaara J., Frondelius T., Lehtovaara A., Stable and unstable friction in fretting contacts, Tribology International, 131 (2019) 73-82.

Nurmi V., Hintikka J., Juoksukangas J., Honkanen M., Vippola M., Lehtovaara A., Mäntylä A., Vaara J., Frondelius T., The formation and characterization of fretting-induced degradation layers using quenched and tempered steel. Tribology International 131 (2019) 258-267.

Juoksukangas J., Lehtovaara A., Mäntylä A., Experimental and numerical investigation of fretting fatigue behavior in bolted joints, Tribology International 103 (2016) 440-448.

Linjamaa A., Lehtovaara A, Larsson R., Kallio M, Söchting S., Modelling and Analysis of Elastic and Thermal Deformations of a Hybrid Journal Bearing. Tribology International 118 (2018) 451-457.

Savolainen M., Lehtovaara A., An approach to investigating subsurface fatigue in a rolling/sliding contact, International Journal of Fatigue 117 (2018) 180-188

Kleemola J., Lehtovaara A., Experimental simulation of gear contact along the line of action, Tribology International 42 (2009) 1453-1459.

Own links

Kati Valtonen

Staff Scientist
Faculty of Engineering and Natural Sciences
Tampere University
+358408490142
Wear of materials, materials characterization
kati.valtonen@tuni.fi

https://orcid.org/0000-0002-0613-5497

More information

About me

I am responsible of the research services and the infrastructure of Tampere Wear Center and the materials characterization facilities. In addition, I work as a coordinator of Wear Forum that is a collaboration network between TWC, research institutes, and companies. My particular research interests are the high stress abrasive and impact wear of steels, characterization of wear mechanisms, and assessment of the relevance of laboratory wear test methods in regard of the in-service performance of steels and other wear resistant materials. I have over 60 peer-reviewed scientific articles and about 70 other scientific publications, including conference papers with h-index 16 (Scopus).

Main positions of trust

Selected publications

Key publications:

Valtonen, K., Ojala, N., Haiko, O., Kuokkala, V.-T. Comparison of various high-stress wear conditions and wear performance of martensitic steels, Wear 426–427:3-13(2019).

Chintha, A.R., Valtonen, K. Kuokkala, V.-T., Kundu, S. Peet, M., Bhadeshia, H.K.D.H. Role of fracture toughness in impact-abrasion wear, Wear 428–429:430-437(2019).

Valtonen, K., Ratia, V., Ramakrihnan, K.R., Apostol, M., Terva, J., Kuokkala, V.-T., Impact wear and mechanical behavior of steels in subzero conditions. Tribology International 129:476-493(2019).

Valtonen, K., Keltamäki, K., Kuokkala, V.-T., High-stress abrasion of wear resistant steels in the cutting edges of loader buckets, Tribology International 119: 707–720(2018).

Valtonen, K., Ratia, V., Ojala, N., Kuokkala, V.-T., Comparison of laboratory wear test results with the in-service performance of cutting edges of loader buckets, Wear 388-389:93-100(2017).

Ojala, N., Valtonen, K., Minkkinen, J. & Kuokkala, V.-T. Edge effect in high speed slurry erosion wear tests of steels and elastomers, Wear 388-389:126-135(2017).

Ojala N., Valtonen K., Antikainen, A., Kemppainen, A., Minkkinen, J., Oja, O., Kuokkala V.-T. Wear performance of quenched wear resistant steels in abrasive slurry erosion, Wear 354-355:21-31(2016).

Oksanen, V., Valtonen, K., Andersson, P., Vaajoki, A., Laukkanen, A., Holmberg, K. & Kuokkala, V. T. 2015. Comparison of laboratory rolling-sliding wear tests with in-service wear of nodular cast iron rollers against wire ropes, Wear 340-341:73-81(2015).

Lindroos, M., Valtonen, K., Laukkanen, A., Holmberg, K., Kuokkala, V-T., Kemppainen, A., Wear behavior and work hardening of high strength steels in high stress abrasion, Wear 322-323:32-40(2015).

Ojala, N., Valtonen K., Heino V., Kallio M., Aaltonen J., Siitonen P. & Kuokkala, V.-T., Effects of composition and microstructure on abrasive wear performance of quenched wear resistant steels, Wear 317(1–2): 225–232(2014).

Ojala, N., Valtonen, K., Kivikytö-Reponen, P., Vuorinen, P., Siitonen, P. & Kuokkala, V.-T., The effect of test parameters on large particle high-speed slurry erosion testing, Tribology - Materials, Surfaces & Interfaces 8(2):98-104(2014).

Ratia, V., Valtonen, K., Kemppainen, A., Vippola, M., Kuokkala, V.-T., High-Stress Abrasion and Impact-Abrasion Testing of Wear Resistant Steels, Tribology Online 8(2):152-161(2013).

Own links