The effect of heat treatment on the structure and corrosion resistance of Al-Zn-Mg alloys

• Autorzy: Jurczak W.
• Języki publikacji: EN

Abstrakty

EN

The parameters of heat treatment of Al-Zn-Mg alloys subjected to precipitation hardening have a substantial impact on mechanical and corrosion resistance. The rate of cooling after supersaturation, along with the ageing temperature and time, affect significantly mechanical properties of these alloys. The type of ageing (artificial or natural) after saturation implies corrosion resistance in seawater. Being a modification of the AlZn5Mg1 alloy, denoted as PA47, the AlZn5Mg2CrZr alloy reveals best mechanical properties among all aluminium alloys in shipbuilding [1]. However, the higher level of precipitation hardening, the higher susceptibility to corrosion, in particular to stress corrosion cracking (SCC). Describing the structure of Al-Zn-Mg alloys by identifying the precipitation free zone (PFZ) and the Guinier-Preston (G-P) zones provides the information on the corrosion resistance of these alloys.

Słowa kluczowe

EN

Aluminium alloys; structure; corrosion resistance; precipitation hardening

• Wydawca: Gdańsk University of Technology, Faculty of Ocean Engineering & Ship Technology
• Czasopismo: Polish Maritime Research
• Rocznik: 2008
• Tom: nr 4
• Strony: 66--71
• Opis fizyczny: Bibliogr.9 poz., rys., tab.

Twórcy

autor

Jurczak W.

• Faculty of Mechanics and Electrics Polish Naval Academy Śmidowicza 69 81-103 Gdynia POLAND,

Bibliografia

• 1. Jurczak W.: The effect of chemical composition and heat treatment on mechanical properties of Al-Zn-Mg alloys used in welded ship structures, and their resistance to stress corrosion. Ph.D. thesis, Gdansk University of Technology 1998 (in Polish)
• 2. Łagin I.: Struktura i swojstwa spłwow sistemy Al-Zn-Mg. W-wa 1982.
• 3. Gorczyca S. et al.: The effect of solid solution hardening and precipitation products action. Metalurgia 29, Proc. Of Conference on Metallurgy and Founding 1981 (in Polish)
• 4. Kawabata T. Izumi O.: Acta Metall, Vol. 24, pp. 817-825, 2006
• 5. Bugłacki H.: The effect of heat treatment and chemical composition of binding materials on mechanical properties and stress corrosion of the AlZn5Mg1 alloy in welded ship structures. Ph. D. thesis. Gdansk University of Technology 1981 (in Polish).
• 6. George F, Vander Voort: . Atlas of aluminium microstructures. 2005
• 7. George F. Vander Voort: Atlas of aluminium microstructures. 2006 by Taylor & Francis Group, LLC
• 8. Łagin et. al: Struktura i swojstwa spłwow sistemy Al-Zn-Mg. W-wa 1982
• 9. Davis J.R.: Aluminium and aluminium alloys. Ohio 2004