Výsledky vyhledávání - "Pallaspuro, S. (Sakari)"

Dissertation/ Thesis

On the factors affecting the ductile-brittle transition in as-quenched fully and partially martensitic low-carbon steels

Autor: Pallaspuro, S. (Sakari)

From the largest discontinuities to the smallest of the elements, various factors can threaten structural integrity. Susceptibility to these factors elevates with higher yield strengths. As-quenched low-carbon steels with a martensitic or martensitic

Externí odkaz: http://urn.fi/urn:isbn:9789526218977

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Design of tough, ductile direct quenched and partitioned advanced high-strength steel with tailored silicon content

Autor: Ghosh, S. (Sumit), Kaikkonen, P. (Pentti), Javaheri, V. (Vahid), Kaijalainen, A. (Antti), Miettunen, I. (Ilkka), Somani, M. (Mahesh), Kömi, J. (Jukka), Pallaspuro, S. (Sakari)

Publikováno v: Journal of Materials Research and Technology, Vol 17, Iss, Pp 1390-1407 (2022)

The novel processing concept of direct quenching and partitioning (DQ&P) has been explored with a medium-carbon (0.4 wt.% C) steel to evaluate and optimize the processing route for excellent property combinations. New compositional design approach wa

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::474d8dd6c5269237c1449fd27186b14d
http://www.sciencedirect.com/science/article/pii/S2238785422000734

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Effect of prior austenite grain morphology on hydrogen embrittlement behaviour under plastic straining in as-quenched 500 HBW steels

Autor: Latypova, R. (Renata), Nyo, T. T. (Tun Tun), Seppälä, O. (Oskari), Fangnon, E. (Eric), Yagodzinskyy, Y. (Yuriy), Mehtonen, S. (Saara), Hänninen, H. (Hannu), Kömi, J. (Jukka), Pallaspuro, S. (Sakari)

Funding Information: This research was supported by Business Finland Oy and Academy of Finland (#337108). The projects ISA – Intelligent Steel Applications and FOSSA– Fossil-Free Steel Applications, are acknowledged. The authors wish to thank the

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1cac9c87fc4b0b10361a08b3b52eb53c
https://aaltodoc.aalto.fi/handle/123456789/121204

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Competitive mechanisms occurring during quenching and partitioning of three silicon variants of 0.4 wt.% carbon steels

Autor: Miettunen, I. (Ilkka), Ghosh, S. (Sumit), Somani, M. C. (Mahesh C.), Pallaspuro, S. (Sakari), Kömi, J. (Jukka)

Quenching and partitioning (Q&P) treated steels are traditionally alloyed with silicon (Si), but its precise role on microstructural mechanisms occurring during partitioning is not thoroughly understood. In this study, dilatometric analysis has been

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=od______2423::03dbfbb7a2eb18ab2a54cc3ea37ba2c0
http://urn.fi/urn:nbn:fi-fe202102013410

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Effects of local grain size and inclusions on the low-temperature toughness of low-carbon as-quenched martensite

Autor: Pallaspuro, S. (Sakari), Mehtonen, S. (Saara), Kömi, J. (Jukka), Zhang, Z. (Zhiliang), Porter, D. (David)

The segregation of alloying elements that occurs during the solidification of steel leads to microscale and macroscale microstructural heterogeneity that can cause anomalous mechanical behaviour. The centreline macrosegregation of a cast and its incr

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::f00d0d237f2a0738ff94bf62347f2530
http://hdl.handle.net/11250/2577980

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Effect of microstructure on the impact toughness transition temperature of direct-quenched steels

Autor: Pallaspuro, S. (Sakari), Kaijalainen, A. (Antti), Mehtonen, S. (Saara), Kömi, J. (Jukka), Zhang, Z. (Zhiliang), Porter, D. (David)

A sufficient level of toughness at low temperatures is paramount for the use of structural steels intended for arctic applications. Therefore, it is important for the steel industry to identify the factors that control brittle fracture toughness. In

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=od______2423::2b03d2a2c2e7737ada6e8ae2fd3c37ac
http://urn.fi/urn:nbn:fi-fe201801172098

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Reference toughness:a pragmatic tool to estimate ductile-brittle transition temperatures

Autor: Pallaspuro, S. (Sakari), Mehtonen, S. (Saara), Kömi, J. (Jukka), Zhang, Z. (Zhiliang), Porter, D. (David)

Recent advances show that tough as-quenched ultra-high-strength steels in fully and partially martensitic conditions demand proper control of the effective coarse grain size, which is the key microstructural parameter controlling the toughness in the

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=od______2423::dbda955d52c9ce153255938619aaa20d
http://urn.fi/urn:nbn:fi-fe201902266262

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T₀ − T28J correlation of low-carbon ultra-high-strength quenched steels

Autor: Pallaspuro, S. (Sakari), Limnell, T. (Teijo), Suikkanen, P. (Pasi), Porter, D. (David)

Direct-quenched structural steels are a cost-effective ultra-high-strength solution for demanding applications. These untempered, mainly S900 and S960 grade steels can possess good impact toughness and weldability when they contain low carbon content

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=od______2423::14f64eb4aca43ffd927b415135ad29ad
http://urn.fi/urn:nbn:fi-fe202001293866

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Development and application of a novel tuning-fork test in studying hydrogen-induced fracture in as-quenched martensitic steels

Autor: Latypova, R. (Renata)

Hydrogen embrittlement (HE) is a well-recognized issue with ultrahigh-strength steels (UHSS) and an intensively studied subject to minimize the risk of sudden, catastrophic failures in structural applications. A novel tuning-fork test (TFT) is develo

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=od______2423::4f3da770d181a361ed9981646e4ec8c6
http://urn.fi/urn:isbn:9789526235103

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