Kinetics of precipitation and recrystallisation of titanium copper

• Autorzy: Konieczny J. , Labisz K. , Rdzawski Z. , Polok-Rubiniec M. , Włodarczyk-Fligier A.
• Języki publikacji: EN

Abstrakty

EN

Purpose: The main aim of this work is to investigate effect of cold working following supersaturation of alloy copper in change in electrical conductivity of the finally aged CuTi4 alloy. Next, plots were worked out describing the kinetics of precipitation and recrystallisation from titanium copper, based on results of the electric conductivity measurements using the KJMA (Kolmogorov, Johnson, Mehl, Avrami) relationship. Design/methodology/approach: The energy of the nucleation activation, precipitation, and grain growth was calculated by approximating the segments of the straight lines shown in the plots. Findings: As a result of the electrical conductivity tests, the energy of the nucleation activation, growth, and precipitation of new particles during the ageing, was calculated for the two different variants of CuTi4 alloy processing. Research limitations/implications: As a result of the electrical conductivity tests, and using the KJMA (Kolmogorov, Johnson, Mehl and Avrami) relationship, the energy of the nucleation activation, precipitations, and growth of new particles during the ageing, was calculated for two treatment variants. Practical implications: It was found that the activation energy of nucleation of crystal nuclei is lower for the alloy treated according to variant 1st (supersaturation, ageing), while the activation energy of the precipitation and grain growth is lower for the alloy treated according to variant 2nd (supersaturation, cold working Z=50%, ageing). Originality/value: Article presented the energy of the nucleation activation, growth, and precipitation of new particles during the ageing, was calculated for the two different variants of CuTi4 alloy processing, based on the results of measurement of electrical conductivity.

Słowa kluczowe

EN

alloyed copper; heat treatment; cold deformation; precipitation; recrystallization

PL

miedź stopowa; obróbka cieplna; odkształcenie na zimno; opad atmosferyczny; rekrystalizacja

• Wydawca: International OCSCO World Press
• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2014
• Tom: Vol. 67, nr 2
• Strony: 53--57
• Opis fizyczny: Bibliogr. 11 poz., rys., tab.

Twórcy

autor

Konieczny J.

autor

Labisz K.

autor

Rdzawski Z.

• Institute of Non-Ferrous Metals, ul. Sowińskiego 5a, 44-100 Gliwice, Poland

autor

Polok-Rubiniec M.

autor

Włodarczyk-Fligier A.

Bibliografia

• [1] A.N. Kolmogorov, Izv. Akad. Nauk USSR, Ser. Mathemat. 1/3 (1937) 355-359.
• [2] W.A. Johnson, R.F. Mehl, Reaction kinetics in processes of nucleation and growth, AIME 135 (1939) 416-430.
• [3] M. Avrami, Kinetics of phase change. I. General theory, Journal of Chemical Physics 7 (1939) 1103-1112.
• [4] M. Avrami, Kinetics of phase change. II. Transformation-time relations for random distribution of nuclei, Journal of Chemical Physics 8 (1940) 212-224.
• [5] R.A. Vandermeer, D. Juul Jensen, Quantifying Recrystallization Nucleation and Growth of Cold-Worked Copper by Microstructural Analysis Kinetics, Metallurgical and Materials Transactions 26A (1995) 2227-2235.
• [6] T. Szykowny, J. Szczutkowski, Cold work and recrystallization of spheroidal cast iron, Archives of Foundry 4/12 (2004) 147-154 (in Polish).
• [7] I. Wierszyłłowski, S. Wieczorek, A. Stankowiak, J. Samolczyk, Kinetics of transformations Turing supersaturation and ageing of Al-4.7% Cu alloy, Metal Forming 16/5 (2005) 31-37 (in Polish).
• [8] Z. Rdzawski, Effect of ageing time on service properties of chromium copper, PhD thesis, AGH - University of Science and Technology, Cracow, 1977, unpublished manuscript (in Polish).
• [9] J. Konieczny, Z Rdzawski, Influence of cold working on microstructure and properties of annealing CuTi4 alloy, Journal of Achievements in Materials and Manufacturing Engineering 55/2 (2012) 331-338.
• [10] E. Donoso, G. Diaz, A. Zuniga, Efecto da la adicion de cadmio en la precipitacion de aleaciones de Cu-Ti, Congreso SAM/CONAMET 2007, San Nicolas, Buenos Aires, Argentina, 2007, 350-355.
• [11] E. Donoso, G. Diaz, J.M. Criado, Kinetics analysis of precipitation in a quasi-binary Cu-1 at.% CoTi alloy, Journal of Thermal Analysis and Calorimetry 91/2 (2008) 491-495.