Zobrazeno 1 - 10
of 22
pro vyhledávání: '"Oskari Haiko"'
Autor:
Marco Freschi, Matteo Di Virgilio, Luca Andena, Marco Mariani, Oskari Haiko, Jukka Kömi, Nora Lecis, Giovanni Dotelli
Publikováno v:
Next Materials, Vol 2, Iss , Pp 100083- (2024)
Ball milling is a fundamental step of powder metallurgy widely employed for composite manufacturing. This work focuses on the influence of ball milling time on the morphological, electrical, and tribological properties of self-lubricating copper-tung
Externí odkaz:
https://doaj.org/article/1af297b06e504c2d99785ac50510b69f
Publikováno v:
Metals, Vol 14, Iss 1, p 60 (2024)
The microstructure and mechanical properties of a low-alloy medium carbon steel (Fe-0.5C-0.9Mn-1Cr-0.16V, in wt.%) were investigated after rapid tempering and compared with a conventionally tempered counterpart. The conventional thermal cycle was per
Externí odkaz:
https://doaj.org/article/27d7477e17b64db4b194058c6576c7d2
Autor:
Marco Freschi, Lara Dragoni, Marco Mariani, Oskari Haiko, Jukka Kömi, Nora Lecis, Giovanni Dotelli
Publikováno v:
Lubricants, Vol 11, Iss 2, p 66 (2023)
Metal matrix self-lubricating composites exhibit outstanding performance in various environments, reaching the required properties by modifying the reinforcement–matrix ratio and the production method. The present research investigated the effects
Externí odkaz:
https://doaj.org/article/63714d71182e4d5982848b0d2079eae0
Autor:
Marco Freschi, Alessia Arrigoni, Oskari Haiko, Luca Andena, Jukka Kömi, Chiara Castiglioni, Giovanni Dotelli
Publikováno v:
Lubricants, Vol 10, Iss 3, p 35 (2022)
Innovative nanostructured materials offer the possibility of enhancing the tribological performance of traditional materials like graphite and molybdenum disulfide (MoS2). In this study, the scratch resistance of two different copper powders, dendrit
Externí odkaz:
https://doaj.org/article/87f02bf96b1d42d6b1af6d812f42ccd9
Autor:
Oskari Haiko, Antti Kaijalainen, Sakari Pallaspuro, Jaakko Hannula, David Porter, Tommi Liimatainen, Jukka Kömi
Publikováno v:
Applied Sciences, Vol 9, Iss 20, p 4231 (2019)
In this paper, the effects of different tempering temperatures on a recently developed ultrahigh-strength steel with 0.4 wt.% carbon content were studied. The steel is designed to be used in press-hardening for different wear applications, which requ
Externí odkaz:
https://doaj.org/article/5da372e6cac545f3a224e0df7a796634
Publikováno v:
Metals, Vol 9, Iss 2, p 256 (2019)
A new experimental steel containing in weight percent 0.3C-2.0Mn-0.5Si-1.0Al-2.2Cr and 0.3C-1.9Mn-1.0Si-1.0Cr was hot rolled in a laboratory rolling mill and directly quenched within the martensite start and finish temperature range. It was then part
Externí odkaz:
https://doaj.org/article/506696256f2a466e88f95a5d021dfab8
Autor:
Oskari Haiko, Sakari Pallaspuro, Vahid Javaheri, Pentti Kaikkonen, Sumit Ghosh, Kati Valtonen, Antti Kaijalainen, Jukka Kömi
Experimental steels, a direct-quenched and partitioned (DQP) steel and a carbide-free bainitic steel (CFB), were tested along with a commercial martensitic 500 HB grade wear resistant steel in high-stress abrasive conditions. The three steels had dif
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::084440aaa6842bbd515e94b840581b15
https://trepo.tuni.fi/handle/10024/148310
https://trepo.tuni.fi/handle/10024/148310
Publikováno v:
Tribologia-Finnish Journal of Tribology
Ultra-high strength steels are widely utilized in many applications operating in harsh abrasive wear conditions.For instance, the machineries used in mining and mineral handling or in agricultural sector require robust, but cost-effective wear-resist
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6e730075ec0cde11649be02649b2da03
https://trepo.tuni.fi/handle/10024/146086
https://trepo.tuni.fi/handle/10024/146086
Autor:
Matteo Di Virgilio, Luca Andena, Nora Francesca Maria Lecis, Marco Freschi, Giovanni Dotelli, Oskari Haiko, Jukka Kömi, Marco Mariani
Publikováno v:
Tribology International. 166:107357
In this preliminary study, a set of self-lubricating copper-tungsten disulfide (Cu-WS2) composites are prepared via a powder metallurgy route to analyze the effects of solid lubricant concentration on their tribological, electrical and wettability pr
Prior austenite grain size has a marked effect on the hardenability, strength, and impact toughness properties of steels. This study was conducted in order to understand the effect of prior austenite grain size and morphology on the mechanical proper
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7bf4771a3734ad73c838ea830f22b871
http://urn.fi/urn:nbn:fi-fe2020062645904
http://urn.fi/urn:nbn:fi-fe2020062645904