The Influence Of The Rare Earth Metals Modification On The Fracture Toughness Of G17CrMo5-5 Cast Steel At Low Temperatures

• Autorzy: Dzioba I. , Kasińska J. , Pała R.

Identyfikatory

DOI

10.1515/amm-2015-0205

Warianty tytułu

PL

Wpływ modyfikacji metalami ziem rzadkich na odporność na pękanie staliwa G17CrMo5-5 w obniżonych temperaturach

• Języki publikacji: EN

Abstrakty

EN

This paper presents the influence of the rare earth metals (REM) modification on mechanical properties and fracture toughness of G17CrMo5-5 cast steel at low temperatures. The REM was in the form of mishmetal. The research has been performed on serial (several) industrial melts. The fracture toughness values of unmodified and modified cast steel at the temperature range from −80°C to 20°C were tested. The reference temperatures of the brittle-to-ductile transition, T_Q, for both unmodified and modified cast steel were determined. The positive influence of the modification by REM on the fracture toughness and the reference temperature T_Q are shown.

PL

Artykuł przedstawia wpływ modyfikacji metalami ziem rzadkich na własności mechaniczne i odporność na pękanie staliwa G17CrMo5-5 w obniżonych temperaturach. Metale ziem rzadkich wprowadzano w postaci mischmetalu. Badania prowadzone były na wytopach przemysłowych. Odporność na pękanie była badana na staliwie niemodyfikowanym i modyfikowanym metalami ziem rzadkich w zakresie temperatur od −80°C do +20°C. Została wyznaczona temperatura przejścia w stan kruchy T_Q dla obu wytopów tj. modyfikowanego i niemodyfikowanego. Przedstawiono pozytywny wpływ modyfikacji na odporność na pękanie oraz temperaturę T_Q.

Słowa kluczowe

EN

modification; rare earth metals (REM); fracture toughness; master curve; temperature of brittle-to-ductile transition

PL

modyfikacja; metale ziem rzadkich; odporność na pękanie; krzywa wzorcowa; temperatura przejścia w stan kruchy

• Wydawca: Institute of Metallurgy and Materials Science of Polish Academy of Sciences ; Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences
• Czasopismo: Archives of Metallurgy and Materials
• Rocznik: 2015
• Tom: Vol. 60, iss. 2A
• Strony: 773--777
• Opis fizyczny: Bibliogr. 18 poz., rys., tab., wykr.

Twórcy

autor

Dzioba I.

• Kielce University of Technology, al. Tysiąclecia P.P. 7, 25-314 Kielce, Poland

autor

Kasińska J.

• Kielce University of Technology, al. Tysiąclecia P.P. 7, 25-314 Kielce, Poland

autor

Pała R.

• Kielce University of Technology, al. Tysiąclecia P.P. 7, 25-314 Kielce, Poland

Bibliografia

• [1] M. Gajewski, J. Kasińska, Rare earth metals influence on mechanical properties and crack resistance of GP240GH and G17CrMo5-5 cast steels, Archives of Foundry Engineering 9 (2009).
• [2] K. Bolanowski, Structure and properties of MA-steel with rare earth elements addition, Archives of Metallurgy and Materials 50 (2005).
• [3] V.V. Luniov, Non metallic inclusions and properties of cast steels, Przegląd odlewnictwa 53, 9 (2003).
• [4] Heon Young Ha, ChanJin Park, HyukSang Kwon, Effect of misch metal on the formation of non - metallic inclusions in 25% Cr duplex stainless steels, Scripta Materialia 55 (2006).
• [5] T. Lis, P. Różański, Engineering of non metallic inclusions in liquid steel, Hutnik – Wiadomości hutnicze, 5 (2005).
• [6] Long – Mei Wang, at el. Study of application of rare elements in advanced low alloy steels. Journal of Alloys and Compounds, 451 (2008).
• [7] M. Gajewski, J. Kasińska, Rare earth metals influence on mechanical properties and crack resistance of GP240GH and G17CrMo5-5 cast steels, Archives of Foundry Engineering 9 (2009).
• [8] M. Gajewski, J. Kasińska, Rare earth metals influence on morphology of non-metallic inclusions and mechanism of GP240GH and G17CrMo5-5 cast steel cracking, Archives of Metallurgy and Materials 9 (2009).
• [9] ASTM E23-07a. Standard Test Method for Notched Bar Impact Testing of Metallic Materials, Annual book of ASTM standards 03.01, 179-206 (2011).
• [10] K. Wallin, Master Curve Analysis of Ductile to Brittle Transition Region Fracture Toughness Round Robin Data (The Euro Fracture Toughness Curve), VTT Technical Document 367.58P, Espoo, Finland, 1998.
• [11] K. Wallin, Recommendations for the Application of Fracture Toughness Data for Structural Integrity Assessments. Proceedings of the Joint IAEA/CSNI Specialists Meeting on Fracture Mechanics Verification by Large-Scale Testing, NUREG/CP-0131 (ORNL/TM-12413), 465-494, October 1993.
• [12] K. Wallin, The Scatter in KIC Results, Engineering Fracture Mechanics 19(6), 1085-1093 (1984).
• [13] X. Gao, R.H. Dodds, Constraint Effects on the Ductile-to-Cleavage Transition Temperature of Ferritic Steels: A Weibull Stress Model, International Journal of Fracture 102, 43-69 (2000).
• [14] C. Ruggeri, R.H. Dodds, K. Wallin, Constraint Effects on Reference Temperature, T0, for Ferritic Steels in the Transition Region, Engineering Fracture Mechanics, 60(1), 19-36 (1998).
• [15] ASTM E1737-96. Standard Test Method for J-Integral Characterization of Fracture Toughness.
• [16] ASTM E1820-09. Standard Test Method for Measurement of Fracture Toughness. Annual book of ASTM standards 03.01, 1070-1118 (2011).
• [17] ASTM E1921-10. Standard Test Method for Determination of Reference Temperature, T0, for Ferritic Steels in the Transition Range. Annual book of ASTM standards 03.01, 1177-1198 (2011).
• [18] FITNET: Fitness for Service Procedure. Fracture - Fatigue - Creep - Corrosion. Edited by M. Koçak, S. Webster, J.J. Janosch, R.A. Ainsworth, R. Koerc, (2008).

Uwagi

EN

Financial support from the Polish Ministry of Science and Higher Education under contracts 01.0.08.00/2.01.01.01.0035 and 01.0.08.00/2.01.01.02.0016 are gratefully acknowledged.

PL

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę.