Open Access Journals

AIMS Materials Science, 2016, 3(4): 1443-1455. doi: 10.3934/matersci.2016.4.1443. Research article

Export file:

Format

RIS(for EndNote,Reference Manager,ProCite)
BibTex
Text

Content

Citation Only
Citation and Abstract

Effect of Fe and Si impurities on the precipitation kinetics of the GPB zones in the Al-3wt%Cu-1wt%Mg alloy

Zoubir Chaieb, Ould Mohamed Ouarda, Azzeddine Abderrahmane Raho, Mouhyddine Kadi-Hanifi

Solids solutions laboratory, physics faculty USTHB, BP 32, El-Alia, Algiers, Algeria

Received: , Accepted: , Published:

Abstract Full Text(HTML) Figure/Table Related pages

The formation of the Guinier-Preston-Bagaryatsky zones in Al-Cu-Mg, controlled by the solute atoms diffusion, occurs through a nucleation, growth and coarsening phenomenon. Both growth and coarsening regime are well described, respectively, by the JMAK model of growth and the LSW theory. In the commercial Al-Cu-Mg alloy, the presence of Fe and Si atoms leads to the formation of soluble particles such Al₂Cu and Mg₂Si, and insoluble particles such Al₁₂Fe₃Si, Al₇Cu₂Fe and Al₆(Fe, Cu) during heat treatment. Then, some of the Cu and Mg atoms are removed from the solid solution and the effective solute atom concentration in the matrix during the heat treatment is reduced leading a reduction in the driving force of the GPB nucleation and growth and a slowing down the nucleation growth reaction .The diffusion coefficient of the solute atom in the alloy, in both pure Al-Cu-Mg and commercial Al-Cu-Mg alloys, are determined during the GPB zones coarsening. No significative difference exists between the diffusion coefficient of the solute atoms in the pure and in the commercial Al-Cu-Mg alloys during the GPB zones coarsening because some of the excess vacancies are eliminated at the sinks and the driving force of the coarsening reaction is due only to the interfacial energy.

Figure/Table

Supplementary

Article Metrics

Keywords: precipitation; growth; coarsening; diffusion; hardening

Citation: Zoubir Chaieb, Ould Mohamed Ouarda, Azzeddine Abderrahmane Raho, Mouhyddine Kadi-Hanifi. Effect of Fe and Si impurities on the precipitation kinetics of the GPB zones in the Al-3wt%Cu-1wt%Mg alloy. AIMS Materials Science, 2016, 3(4): 1443-1455. doi: 10.3934/matersci.2016.4.1443

References:

1. Silcock JM (1960) The structural ageing characteristics of Al-Cu-Mg alloys with copper: Magnesium weight ratios of 7:1 and 2.2:1. J Inst Met 89: 203–210.
2. Gupta AK, Gaunt P, Chaturvedi MC (1987) The crystallography and morphology of the S’-phase precipitate in an Al (CuMg) alloy. Phil Mag A 55: 375–387.
3. Radmilovic V, Thomas G, Shiflet GJ, et al. (1989) On the nucleation and growth of Al₂CuMg (S’) in AlLiCuMg and AlCuMg alloys. Scripta Mater 23: 1141–1146.
4. Ringer SP, Sakura T, Polmear IJ (1997) Origins of hardening in aged Al-Cu-Mg-(Ag) alloys. Acta Mater 45: 3731–3744.
5. Federighi T (1958) Quenched-in vacancies and rate of formation of zones in aluminum alloys. Acta Metall 6: 379–381.
6. Federighi T, Thomas G (1962) The interaction between vacancies and zones and the kinetics of pre-precipitation in Al-rich alloys. Phil Mag 7: 127–131.
7. Girifalco LA, Herman H (1965) A model for the growth of Guinier-Preston zones-the vacancy pump. Acta Metall 13: 583–590.
8. Wang SC, Li CZ, Yan MG (1990) Precipitates and intermetallic phases in precipitation hardening Al-Cu-Mg alloys. Acta Metall Sin 3A: 104–109.
9. Starke EA, Staley JT (1996) Application of modern aluminum alloys to aircraft. Prog Aerosp Sci 32: 131–172.
10. Leschiner LN, Kovalyov VG (1990) Effect of Iron and Silicon in Aluminium and Its Alloys. Key Eng Mater 44-45: 299–310.
11. Guo Z, Sha W (2005) Quantification of precipitate fraction in Al-Si-Cu alloys. Mater Sci Eng A 392: 449–452.
12. Waterloo G, Hansen V, Gjonnes J, et al. (2001) Effect of predeformation and preaging at room temperature in Al-Zn-Mg-(Cu, Zr) alloys. Mater Sci Eng A 303: 226–233.
13. Wang G, Sun Q, Feng L, et al. (2007) Influence of Cu content on ageing behavior of AlSiMgCu cast alloys. Mater Design 28: 1001–1005.
14. Novelo-Peralta O, Gonzalez G, Lara Rodriguez GA (2008) Characterization of precipitation in Al-Mg-Cu alloys by X-ray diffraction peak broadening analysis. Mater Charact 59: 773–780.
15. Shokuhfar S, Ahmadi S, Arabi H, et al. (2009) Mechanisms of precipitates formation in an Al-Cu-Li-Zr alloy using DSC technique and electrical resistance measurements. Iran J Mater Sci Eng 6: 15–20.
16. Anjabin N, Taheri AK (2010) The effect of aging treatment on mechanical properties of AA6082 alloy: modelling experiment. Iran J Mater Sci Eng 7: 14–21.
17. Johnson WA, Mehl RF (1939) Reaction kinetics in processes of nucleation and growth. Trans Am Inst Mining Metall Eng 135S: 416–458.
18. Avrami M (1941) Kinetics of phase change. III: Granulation, Phase Change and Microstructure. J Chem Phys 9: 177–184
19. Kolmogorov AN (1937) Statistical theory of crystallization of metals. Bull Acad Sci USSR Ser Math 1: 355–359.
20. Doherty RD (1996) Diffusive phase transformations in the solid state, in Physical Metallurgy 4^th edition, eds., Cahn RW, Hassen P, North Holland, Amsterdam, 2: 1364–1505.
21. Christian JW (1975) The theory of phase transformations in metals and alloys, Pergamon Press, Oxford, 542–546.
22. Esmaeili S, Lloyd DJ, Poole WJ (2003) A yield strength model for the Al-Mg-Si-Cu alloy AA6111. Acta Mater 51: 2243–2257.
23. Merlin J, Merle P (1978) Analistic phenomena and structural state in aluminium silver alloys. Scripta Metal 12: 227–232.
24. Wilson RN, Moore DM, Forsyth PJE (1967) Effect of 0.25% silicon on precipitation processes in an aluminium-2.5% copper-1.2% magnesium alloy. J Inst Met 95: 177–183.
25. Hutchinson CR, Ringer SP (2000) Precipitation processes in AlCuMg alloys microalloyed with Si. Metall Mater Trans A 31: 2721–2733.
26. Lifshitz IM, Slyosov VV (1961) The kinetics of precipitation from supersaturated solid solutions. J Phys Chem Solids 19: 35–50.
27. Wagner C (1961) Theorie der Alterung von Niderschlagen durch Umlösen (Ostwald Reifung). Z Electrochem 65: 581–591.
28. Khan IN, Starink MJ (2008) Microstructure and strength modelling of Al-Cu-Mg alloys during non-isothermal treatments: Part 1—controlled heating and cooling. Mater Sci Technol 24: 1403–1410.
29. Khan IN, Starink MJ, Yan JL (2008) A model for precipitation kinetics and strengthening in Al-Cu-Mg alloys. Mater Sci Eng A 472: 66–74.
30. Mantina M, Wang Y, Arroyave R, et al. (2008) First-principles calculation of self-diffusion coefficients. Phys Rev Lett 100: 5901–5904.
31. Mantina M, Wang Y, Chen LQ, et al. (2009) First principles impurity diffusion coefficients. Acta Mater 57: 4102–4108.
32. Peterson NL, Rothman SJ (1970) Impurity diffusion in aluminum. Phys Rev B 1: 3264–3273.
33. Murphy JB (1961) Interdiffusion in dilute aluminium-copper solid solutions. Acta Metall 9: 563–569.
34. Du Y, Chang YA, Huang B, et al. (2003) Diffusion coefficients of some solutes in fcc and liquid Al: Critical evaluation and correlation. Mater Sci Eng A 363: 140–151.
35. Rothman SJ, Peterson NL, Nowicki LJ, et al. (1974) Tracer diffusion of Magnesium in Aluminum single crystals. Phys Status Solidi B 63K: 29–33.
36. Moreau G, Cornet JA, Calais D (1971) Acceleration de la diffusion chimique sous irradiation dans le systeme aluminium-magnesium. J Nucl Mater 38: 197–202.
37. Sandberg N, Holmestad R (2006) First-principles calculations of impurity diffusion activation energies in Al. Phys Rev B 73: 014108.
38. Adams JB, Foiles SM, Wolfer WG (1989) Self-diffusion and impurity diffusion of FCC metals using the 5-frequency model and the Embedded Atom Method. J Mater Res 4: 102–112.
39. Verlinden J, Gijbbels R (1980) Impurity diffusion in aluminum as determined from ion-probe mass analysis. Adv Mass Spectrom 8A: 485–495.
40. Simonovic D, Sluiter MHF (2009) Impurity diffusion activation energies in Al from first principles. Phys Rev B 79: 054304.
41. Fujikawa S, Hirano K (1977) Diffusion of 28 Mg in aluminum. Mater Sci Eng 27: 25–33.

show all references

This article has been cited by:

1. Jose Alvarez-Antolin, Elvira Segurado-Frutos, Hilario Neira-Castaño, Juan Asensio-Lozano, Heat Treatment Optimization in Al-Cu-Mg-Si Alloys, with or without Prior Deformation, Metals, 2018, 8, 10, 739, 10.3390/met8100739

Reader Comments

your name: * your email: *

Copyright Info: 2016, Azzeddine Abderrahmane Raho, et al., licensee AIMS Press. This is an open access article distributed under the terms of the Creative Commons Attribution Licese (http://creativecommons.org/licenses/by/4.0)

Download full text in PDF

Associated material

Metrics