Structure and properties changes of Fe₇₈Si₉B₁₃ metallic glass by low-temperature thermal activation process

• Autorzy: Griner S. , Babilas R. , Nowosielski R.
• Języki publikacji: EN

Abstrakty

EN

Purpose: The paper presents a structural relaxation process of Fe₇₈Si₉B₁₃ metallic glasses and structure and properties changes in a temperature range up to 300°C after annealing from 2 to 16 hours. Design/methodology/approach: The relaxation and crystallization of Fe₇₈Si₉B₁₃ metallic glasses were examined by mechanical test, relaxation test, scanning electron microscopy (SEM) and transmission electron microscopy (TEM) methods. Findings: The influence of thermal activation on the structural relaxation process of Fe₇₈Si₉B₁₃ metallic glasses was determined after annealing from temperature of 100 to 300°C. The beginning of the structural relaxation was revealed after annealing at 100 and 150°C, especially after long annealing times of 8 and 16 hours. The structural relaxation process was confirmed by examination of dimensional changes of samples associated with partial reduction of free volume and the ordering of topological and chemical structure of metallic glass. Significant changes in the structure and properties of the alloy was observed after annealing at 300°C. The reduction of tensile strength and high fragility of samples was also determined. This decrease is associated with extending of the structural relaxation and beginning of crystallization process by formation of small crystallites of α-Fe phase in amorphous matrix. Research limitations/implications: The structural relaxation process and beginning of crystallization on changes of strength, ductility, fracture morphology, structure, process of stress relaxation and geometry of studied alloy were also achieved in function of temperature and time of annealing. Practical implications: The course of relaxation processes can be used for analysis of thermal stability of metallic glasses. Originality/value: The paper presents a significant influence of low-temperature thermal activation, which was conducted up to 16 hours, on the structural relaxation and changes of selected mechanical properties.

Słowa kluczowe

EN

amorphous materials; relaxation; mechanical properties; fracture morphology

• Wydawca: International OCSCO World Press
• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2012
• Tom: Vol. 50, nr 1
• Strony: 18--25
• Opis fizyczny: Bibliogr. 25 poz., rys.

Twórcy

autor

Griner S.

• Division of Nanocrystalline and Functional Materials and Sustainable Pro-ecological Technologies, Institute of Engineering Materials and Biomaterials, Silesian University of Technology, ul. Konarskiego 18a, 44-100 Gliwice, Poland

autor

Babilas R.

• Division of Nanocrystalline and Functional Materials and Sustainable Pro-ecological Technologies, Institute of Engineering Materials and Biomaterials, Silesian University of Technology, ul. Konarskiego 18a, 44-100 Gliwice, Poland

autor

Nowosielski R.

• Division of Nanocrystalline and Functional Materials and Sustainable Pro-ecological Technologies, Institute of Engineering Materials and Biomaterials, Silesian University of Technology, ul. Konarskiego 18a, 44-100 Gliwice, Poland

Bibliografia

• [1] H.S. Chen, Glassy Metals, Reports on Progress in Physics 43 (1980) 355-428.
• [2] R. Zallen, The physics of amorphous solids, PWN, Warsaw, 1994 (in Polish).
• [3] J. Rasek, Amorphous materials and their properties, In the range of crystallography and materials science, Silesian University Press, Katowice, 2002, 207-245 (in Polish).
• [4] S. Griner, R. Nowosielski, Technical applications of metallic glasses, Proceedings of the Conference “Modern achievements of materials science”, Silesian University of Technology, 1992, 171 (in Polish).
• [5] A. Van Den Beukel, Structural relaxation in FeCrPMnC amorphous alloy, Journal of Non-Crystalline Solids 83 (1986) 134-140.
• [6] G.P. Tiwari, R.V. Ramanujan, M.R. Gonal, R. Prasad, P. Raj, B.P. Badguzar, G.L. Goswami, Structural relaxation in metallic glasses, Materials Science and Engineering A 304-306 (2001) 499-504.
• [7] R. Nowosielski S. Griner, T. Poloczek, Influence of amorphous structure’s different stages on structural relaxation and the elementary stage of metallic glasses crystallization, Proceedings of the 11th Scientific Conference on the “Contemporary Achievements in Mechanics, Manufacturing and Materials Science” CAM3S’2005, Gliwice - Zakopane, 2005, 720-727.
• [8] W. Moroń, Structural relaxation in metallic glasses, Scientific works of Silesian University, Physics and Chemistry of Metals 10 (1991) (in Polish).
• [9] T. Poloczek, Crystallization of Ni68,7Cr6,6Fe2,65Si78B14C0,25 amorphous alloy, Doctoral dissertation, Silesian University of Technology, Gliwice, 2004 (in Polish).
• [10] J. Rasek, Some diffusion phenomena in crystalline and amorphous metals, Silesian University Press, Katowice, 2000 (in Polish).
• [11] W.J. Botta F.D. Negri, A.R. Yavari, Crystallization of Fe-based amorphous alloys, Journal of Non-Crystalline Solids 247 (1999) 19-25.
• [12] Y.J. Liu, I.T.H. Chang, Compositional dependence of crystallization behaviour of mechanically alloyed amorphous Fe-Ni-Zr-B alloys, Materials Science and Engineering A 325 (2002) 25-30.
• [13] H. Chiriac, F. Vinai, M. Tomut, A. Stantero, E. Ferrara, On the crystallization of amorphous Fe85B15 ribbons produced with different heat treatments of the liquid alloy before ejection, Journal of Non-Crystalline Solids 250-252 (1999) 709-713.
• [14] W.J. Botta F.D. Negri, A.R. Yavari, Crystallization of Fe-based amorphous alloys, Journal of Non-Crystalline Solids 247 (1999) 19-25.
• [15] L. Vandebosche, L. Dupre, M. de Wulf, J. Malkebeek, Soft magnetic materials, vol. 2, Topic 4: Amorphous and nanocrystalline alloys, Max-Planc Institut Für Eisenforschung GmbH, Düsseldorf, 2004, 517-749.
• [16] V.H. Hammond, M.D. Houtz, J.M. O’Reilly, Structural relaxation in a bulk metallic glass, Journal of Non-Crystalline Solids 325 (2003) 179-186.
• [17] T. Egami, Structural relaxation and magnetism in amorphous alloys, Journal of Magnetism and Magnetic Materials 31-34 (1983) 1571-1574.
• [18] G.P. Tiwari, R.V. Ramanujan, M.R. Gonal, R. Prasad, P. Raj, B.P. Badguzar, G.L. Goswami, Structural relaxation in metallic glasses, Materials Science Engineering A 304306 (2001) 499-504.
• [19] A. Van den Beukel, Structural relaxation in metallic glasses, Trends in Non-Crystalline Solids, World Scientific Publishing, Singapore, 1992, 215.
• [20] P. Kwapuliński, J. Rasek, Z. Stokłosa, G. Badura, B. Kostrubiec, G. Haneczok, Magnetic and mechanical properties in FeXSiB (X=Cu, Zr, Co) amorphous alloys, Archives of Materials Science and Engineering 31/1 (2008) 25-28.
• [21] P. Kwapuliński, Z. Stokłosa, J. Rasek, G. Badura, G. Haneczok, L. Pająk, L. Lelątko, Influence of alloying additions and annealing time on magnetic properties in amorphous alloys based on iron, Journal of Magnetism and Magnetic Materials 320 (2008) 778-782.
• [22] T. Kulik, Nanocrystallization of metallic glasses, Journal of Non-Crystalline Solids 287 (2001) 145-161.
• [23] T. Poloczek, S. Griner, R. Nowosielski, Crystallisation process of Ni-base metallic glasses, Journal of Achievements in Materials and Manufacturing Engineering 17 (2006) 133-136.
• [24] R. Nowosielski, R. Babilas, S. Griner, G. Dercz, A. Hanc, Crystallization of Fe72B20Si4Nb4 metallic glasses ribbons, Journal of Achievements in Materials and Manufacturing Engineering 34/1 (2009) 15-22.
• [25] S. Griner, T. Poloczek, R. Nowosielski, Influence of thermal activation on changes of mechanical properties and tensile fracture morphology surface of Ni-base metallic glasses, Archives of Materials Science and Engineering 44/1 (2010) 13-20.