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Параметры кинетики выделения метастабильной фазы b'' в алюминиевом сплаве Al – Mg – Si – Cu с высоким соотношением Mg/Si, определенные с использованием расширенного неизотермического анализа
Аннотация
В настоящем исследовании с использованием усовершенствованных изоконверсионных методов (Вязовкина и Ортеги) определен кинетический триплет осаждения метастабильной фазы b² в сплаве Al – Mg – Si(Cu) с высоким отношением Mg/Si. При этом учтено, что зависимость реакции от времени и температуры известна, как только известен кинетический триплет (параметры). Для сравнения использованы традиционные методы Фридмана, Киссинджера – Акахиры – Сунозе (KAS) и Озавы – Флинна – Уолла (OFW). Установлено, что методы Фридмана, Вязовкина и Ортеги приводят к одинаковому изменению энергии активации в зависимости от степени конверсии, что численно объясняется как конкуренция двух процессов, связанных с реакциями зародышеобразования и роста. Определение предэкспоненциального множителя с использованием метода компенсационного эффекта позволяет идентифицировать модель реакции ( f (α) = 2(1 – α)[– ln(1 – α)]1/2 ), которая, как установлено, соответствует одномерному механизму зародышеобразования и роста Аврами, причем независимо от используемого метода определения энергии активации и скорости нагрева.
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Литература
M. Cabibbo, E. Evangelista, and M. Vedani, “Influence of severe plastic deformations on secondary phase precipitation in a 6082 Al-Mg-Si alloy,” Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science 36, 1353–1364 (2005).
J. Buha, R. N. Lumley, A. G. Crosky, and K. Hono, “Secondary precipitation in an Al-Mg-Si-Cu alloy,” Acta Materialia 55, 3015–3024 (2007).
J. D. Bryant, “The effects of preaging treatments on aging kinetics and mechanical properties in AA6111 aluminum autobody sheet,” Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science 30, 1999–2006 (1999).
Y. Aruga, M. Kozuka, Y. Takaki, and T. Sato, “Evaluation of Solute Clusters Associated with Bake-Hardening Response in Isothermal Aged Al-Mg-Si Alloys Using a Three-Dimensional Atom Probe,” Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science 45, 5906–5913 (2014).
W. J. Kim, J. Y. Wang, S. O. Choi, H. J. Choi, and H. T. Sohn, “Synthesis of ultra high strength Al-Mg-Si alloy sheets by differential speed rolling,” Materials Science and Engineering: A 520, 23–28 (2009).
S. Esmaeili, X. Wang, D. J. Lloyd, and W. J. Poole, “On the precipitation-hardening behavior of the Al-Mg-Si-Cu alloy AA6111,” Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science 34, 751–763 (2003).
M. Bieda and A. Jarzebska, “Characterization of precipitates in aluminium alloy 6013 after cold-rolling and annealing,” Acta Physica Polonica A 130, 988–990 (2016).
C. Y. Liu, P. F. Yu, X. Y. Wang, M. Z. Ma, and R. P. Liu, “Preparation of high-strength Al-Mg-Si-Cu-Fe alloy via heat treatment and rolling,” International Journal of Minerals, Metallurgy and Materials 21, 702–710 (2014).
R. Zang, Y. Ning, L. Ding, Z. Jia, K. Xiang, Q. Liu, L. Cao, and Y. Li, “Study on properties and precipitation behavior of 6000 series alloys with high Mg/Si ratios and Cu contents,” Materials Characterization 194, 112402 (Elsevier Inc., 2022).
A. Perovic, D. D. Perovic, G. C. Weatherly, and D. J. Lloyd, “Precipitation in aluminum alloys AA6111 and AA6016,” Scripta Materialia 41, 703–708 (1999).
M. P. Liu, T. H. Jiang, J. Wang, Q. Liu, Z. J. Wu, Y. Da Yu, P. C. Skaret, and H. J. Roven, “Aging behavior and mechanical properties of 6013 aluminum alloy processed by severe plastic deformation,” Transactions of Nonferrous Metals Society of China (English Edition) 24, 3858–3865 (The Nonferrous Metals Society of China, 2014).
S. Zhu, Z. Li, L. Yan, X. Li, S. Huang, H. Yan, Y. Zhang, and B. Xiong, “Natural aging behavior in pre-aged Al–Mg–Si–Cu alloys with and without Zn addition,” Journal of Alloys and Compounds 773, 496–502 (Elsevier B.V., 2019).
S. Vyazovkin, A. K. Burnham, J. M. Criado, L. A. Pérez-Maqueda, C. Popescu, and N. Sbirrazzuoli, “ICTAC Kinetics Committee recommendations for performing kinetic computations on thermal analysis data,” Thermochimica Acta 520, 1–19 (Elsevier B.V., 2011).
A. K. Brown, Michael; Dollimore, D.; Galwey, Reactions in the Solid State, Elsevier S (Amsterdam, 1980).
S. Vyazovkin, Modern Isoconversional Kinetics: From Misconceptions to Advances, 2nd ed., in Handbook of Thermal Analysis and Calorimetry 6, 2nd ed. (Elsevier B.V., 2018).
H. L. Friedman, “Kinetics of thermal degradation of char‐forming plastics from thermogravimetry. Application to a phenolic plastic,” Journal of Polymer Science Part C: Polymer Symposia 6, 183–195 (1964).
H. E. Kissinger, “Reaction Kinetics in Differential Thermal Analysis,” Analytical Chemistry 29, 1702–1706 (1957).
T. Akahira, T; Sunose, “Method of determining activation deterioration constant of electrical insulating,” Research report, Chiba Institute of Technology 16, 22–31 (1971).
J.H. Flynn; L.A. Wall, “A quick, direct method for the determination of activation energy from thermogravimetric data,” Polymer letters 4, 323–328 (1966).
T. Ozawa, “A New Method of Analyzing Thermogravimetric Data,” Bulletin of the Chemical Society of Japan 38, 1881–1886 (1965).
S. Vyazovkin, “A time to search: Finding the meaning of variable activation energy,” Physical Chemistry Chemical Physics 18, 18643–18656 (Royal Society of Chemistry, 2016).
A. Ortega, “A simple and precise linear integral method for isoconversional data,” Thermochimica Acta 474, 81–86 (2008).
S. Vyazovkin and W. Linert, “False isokinetic relationships found in the nonisothermal decomposition of solids,” Chemical Physics 193, 109–118 (1995).
S. V. Vyazovkin and A. I. Lesnikovich, “Estimation of the pre-exponential factor in the isoconversional calculation of effective kinetic parameters,” Thermochimica Acta 128, 297–300 (1988).
S. Vyazovkin, “Modification of the Integral Isoconversional Method to Account for Variation in the Activation Energy,” Journal of Computational Chemistry 22, 178–183 (2001).
S. Vyazovkin, “A Unified Approach to Nonisothermal Data,” Unified Kinetic Processing, 95–101 (1995).
Z. Jia, L. Ding, L. Cao, R. Sanders, S. Li, and Q. Liu, “The Influence of Composition on the Clustering and Precipitation Behavior of Al-Mg-Si-Cu Alloys,” Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science 48, 459–473 (Springer US, 2017).
L. Ding, Z. Jia, Z. Zhang, R. E. Sanders, Q. Liu, and G. Yang, “The natural aging and precipitation hardening behaviour of Al-Mg-Si-Cu alloys with different Mg/Si ratios and Cu additions,” Materials Science and Engineering: A 627, 119–126 (Elsevier, 2015).
M. X. Guo, X. K. Zhang, J. S. Zhang, and L. Z. Zhuang, “Effect of Zn addition on the precipitation behaviors of Al–Mg–Si–Cu alloys for automotive applications,” Journal of Materials Science 52, 1390–1404 (Springer US, 2017).
A. Gaber, A. M. Ali, K. Matsuda, T. Kawabata, T. Yamazaki, and S. Ikeno, “Study of the developed precipitates in Al-0.63Mg-0.37Si-0.5Cu (wt.%) alloy by using DSC and TEM techniques,” Journal of Alloys and Compounds 432, 149–155 (2007).
S. Zhu, Z. H. Li, L. Z. Yan, X. W. Li, S. H. Huang, H. W. Yan, Y. A. Zhang, and B. Q. Xiong, “Transformation behavior of precipitates during artificial aging at 170 °C in Al–Mg–Si–Cu alloys with and without Zn addition,” Rare Metals 40, 1907–1914 (2021).
G. A. Edwards, K. Stiller, G. L. Dunlop, and M. J. Couper, “The precipitation sequence in Al-Mg-Si alloys,” Acta Materialia 46, 3893–3904 (1998).
D. J. Chakrabarti, Y. Peng, and D. E. Laughlin, “Precipitation in Al-Mg-Si alloys with Cu additions and the role of the Q′ and related phases,” Materials Science Forum 396–402, 857–862 (2002).
J. P. Coats, A.W. ; Redfern, “Kinetic Parameters from Thermogravimetric Data,” Nature 201, 68–69 (1964).
M. J. Starink, “Activation energy determination for linear heating experiments: Deviations due to neglecting the low temperature end of the temperature integral,” Journal of Materials Science 42, 483–489 (2007).
M. J. Starink, “The determination of activation energy from linear heating rate experiments: A comparison of the accuracy of isoconversion methods,” Thermochimica Acta 404, 163–176 (2003).
C. D. Doyle, “Estimating isothermal life from thermogravimetric data,” Journal of Applied Polymer Science 6, 639–642 (1962).
J. Opfermann and E. Kaisersberger, “An advantageous variant of the Ozawa-Flynn-Wall analysis,” Thermochimica Acta 203, 167–175 (1992).
J. H. Flynn, “THE ISOCONVERSlONAL METHOD FOR DETERMINATION OF Corrections for the Doyle approximation,” Journal Of Thermal Analysis 27, 95–102 (1983).
S. Vyazovkin, A. K. Burnham, L. Favergeon, N. Koga, E. Moukhina, L. A. Pérez-Maqueda, and N. Sbirrazzuoli, “ICTAC Kinetics Committee recommendations for analysis of multi-step kinetics,” Thermochimica Acta 689 (2020).
M. J. Starink and A. M. Zahra, “An analysis method for nucleation and growth controlled reactions at constant heating rate,” Thermochimica Acta 292, 159–168 (1997).
A. T. W. Kempen, F. Sommer, and E. J. Mittemeijer, “Determination and interpretation of isothermal and non-isothermal transformation kinetics; The effective activation energies in terms of nucleation and growth,” Journal of Materials Science 37, 1321–1332 (2002).
C. S. Tsao, C. Y. Chen, U. S. Jeng, and T. Y. Kuo, “Precipitation kinetics and transformation of metastable phases in Al-Mg-Si alloys,” Acta Materialia 54, 4621–4631 (2006).
J. Christian, The theory of transformation in metals and alloys, Pergamon P (Oxford, 1975).
DOI: https://doi.org/10.30906/mitom.2025.11.51-52
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