Characterization of the structure of FeAl alloy after hot deformation

• Autorzy: Jabłońska M. , Rodak K. , Niewielski G.
• Języki publikacji: EN

Abstrakty

EN

Purpose: Purpose of this paper was the study of the microstructure of Fe-38Al alloy after hot deformation with the dislocation structure description. Design/methodology/approach: Methodology of the microstructures research included LM (light microscopy) and TEM (transmission electron microscopy) techniques which has characterized the dislocation structure in these materials. The Fe-38Al alloy has been deformed by torsion plastometer within the range of temperatures from 850°C to 1250°C. All samples has been deformed to rupture. Findings: The findings of this study is that the deformation in this alloy is controlled by dislocation motion. The observed dislocations are predominantly of <100> and <111>. At a deformation temperature of 1100°C TEM observations have shown dislocation loops and helices. In this alloy was observed dynamic recrystalization process during the hot deformation. Practical implications: Practical implications of this research is that this alloy may by deformed in long range of strain in temperatures at 800°C to 1000°C Occure 1100°C the plasticity is limited by order - disorder transformation. This transformation could be responsible for dislocations structure behavior what was found. Originality/value: Value of this paper was important in providing a better understanding of technological plasticity of FeAl alloys. The dislocation and reactions between the defects of the structure play a dominant role and are responsible for the variation of technological plasticity.

Słowa kluczowe

EN

metallic alloys; transmission electron microscopy; substructure; dislocations; order-disorder transition

PL

stop metali; transmisyjna mikroskopia elektronowa; TEM; podkonstrukcja; dyslokacja

• Wydawca: International OCSCO World Press
• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2006
• Tom: Vol. 18, nr 1-2
• Strony: 107--110
• Opis fizyczny: Bibliogr. 12 poz., rys., tab.

Twórcy

autor

Jabłońska M.

• Department of Materials Science, Silesian University of Technology, ul. Krasińskiego 8, Katowice 40-019, Poland

autor

Rodak K.

• Department of Materials Science, Silesian University of Technology, ul. Krasińskiego 8, Katowice 40-019, Poland

autor

Niewielski G.

• Department of Materials Science, Silesian University of Technology, ul. Krasińskiego 8, Katowice 40-019, Poland

Bibliografia

• [1] D.G Morris, Pinning of dislocation and the origin of the stress anomaly In FeAl alloys, Intermetalics 7, 1999, 1059-1068.
• [2] D.G Morris, et al. Strengthening at intermediate temperatures in iron aluminides Materials Science and Engineering, 1997, A239-240, 23-38.
• [3] J.H Schneibel, et al. On the path dependence of the thermal vacancy concentration in stoichiometric FeAl, Intermetalics 12, 2004, 111-115.
• [4] A.O Mekhrabov, et al. Effect of ternary alloying elements addition on atomic ordering characteristics of Fe-Al intermetallics, Acta mater. 47, 1999, 2067-2075
• [5] C. T. Liu., V.K. Sikka. C. G. McKamey., Alloy development, Lockheeadv Martin Energy Systems, Oak Ridge Natl. Lab. Oak Ridge, Tennessee, 1993.
• [6] R. Imayev, E. Evangelista, O. Tassa, J. Stobrawa, Materials Science and Engineering, A 202, 1995, s. 128-133.
• [7] Y.D.Huang, L. Froyen, recovery, recrystalization and grain growth in Fe3Al based alloys, Intermetalics, 10, 2002, s. 443
• [8] M. Jabłońska, Influence of hot plastic deformation parameters on the structure and properties of the Fe-38Al alloy, PhD Thesis, Faculty of Material Engineering and Metallurgy of the Silesian University of Technology, Katowice, 2005.
• [9] M. Jabłońska, G. Niewielski, E. Hadasik, K. Mokryński, W. Szkliniarz „Influence of hot deformation on changes in structure of intermetalics FeAl ” , METAL 2003, Hradec nad Moravici, V, 2003 r.
• [10] D.B. Williams, et al. Transmission Electron Microscopy - a Textbook for Materials Science, Plenum Press, 1996, p. 425.
• [11] K Rodak,. Dynamic processes of structural reconstruction in hot deformed austenitic, PhD Thesis, Faculty of Material Engineering, Metallurgy and Transport of the Silesian University of Technology, Katowice, 1999.
• [12] M. Jabłońska, K. Rodak, G. Niewielski, Analysis of the structure of the intermetallic FeAl40 after hot deformation, XVII Physical Metallurgy and Materials Science Conference „Advanced Materials and Technologies AMT’2004”, 22-26.VI. 2004, Łódź, Inżynieria Materiałowa nr 3, 2004, 145-14