The Effect of Quenching in Polymer and Addition of 0.1% Zr on Properties of Al-5.6% Zn-2.5%Mg-1.6%Cu Alloy

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The Al-Zn-Mg-Cu aluminum alloys are primarily used in the aerospace industry as structural components. This study aim to improve properties of Al-5.6% Zn-2.5%Mg-1.6%Cu such as impact toughness, thermal stability and corrosion resistance by using quenching in 30% polyethylene glycol and addition 0.1%Zr to this alloy. Results showed that the addition 0.1% Zr to base alloy improve impact toughness by (40%) when quenching in water, and by (60 %) when quenching in 30%PAG corresponding to the base alloy when aging at 150 °C. Also results showed that the thermal stability improved when we addition 0.1% Zr by (20%). An improvement of corrosion resistance when addition 0.1% Zr (B alloy) by (326 %), at aging time 150°C in comparison to the base alloy.

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1305-1312

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October 2011

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© 2012 Trans Tech Publications Ltd. All Rights Reserved

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[1] I. Mitchell, ' Residual stress reduction during quenching of wrought 7075 aluminum alloy ', Worcester Polytechnic Institute, Materials Science and Engineering, May (2004).

Google Scholar

[2] Z. Zhuo and C. Kang-hua, ' Effect of Yb addition on strength and fracture toughness of Al-Zn-Mg-Cu-Zr aluminum alloy ', , Transactions of Nonferrous Metals Society of China, (2008).

DOI: 10.1016/s1003-6326(08)60177-6

Google Scholar

[3] A. Sverdlin and G. Totten, ' Cooling media ', , Metal Sience and Heat treatment, Vol. 38, No. 6, pp.14-17, June (1996).

Google Scholar

[4] G. Sarmiento, D. Coscia, C. Jouglard, G. Totten, G. Webster and J. Vega, ' Residual stresses, distortion and heat transfer coefficients of 7075 aluminum alloy probes quenched in water and polyalkylene glycol solutions', ASM International, Materials Park‏, Ohio, pp.1118-1124, October, (2000).

Google Scholar

[5] O. Es-Said, T. Ruperto and S. Vasquez, ' Warpage behavior of 7075 aluminum alloy extrusions', Journal of Materials Engineering and Performance, ASM International, Vol. 16, No. 2, pp.242-247, April, (2007).

DOI: 10.1007/s11665-007-9044-0

Google Scholar

[6] A. Bedarev and G. Konyukhov , ' Use of water-soluble polymer for quenching aluminum alloys ', , No. 1, pp.48-52, January, (1978).

Google Scholar

[7] K. Srinivasa Rao and K. Prasad Rao, ' Pitting corrosion of heat-treatable aluminum alloys and welds : a review ', , Department of Metallurgical and Materials Engineering, Trans. Indian Inst. Met., Vol. 57, No. 6, , pp.593-610, December, (2004).

Google Scholar

[8] J. Genescaa, J. Mendozab, R. Duranb and E. Garciab, ' Conventional DC electrochemical techniques in corrosion testing ', , Department of Metallurgical Engineering. Faculty of Chemistry, City University, Mexico, (2003).

Google Scholar

[9] ASM Aerospace Specification Metals Inc., ' ASM Material Data Sheet', on the web: http: /asm. matweb. com/search/SpeciificMaterial. asp, bassnum=MA7075T6.

Google Scholar

[10] M. Andre´ Meyers, Mechanical behavior of materials, Cambridge University Press, second edition, ISBN-13 978-0-511-45557-5, (2009).

Google Scholar

[11] Wlliam D. Allister, JR. , Materials science and engineering ', an introduction, Fifth edition, University of Utah., 2000. -a- -b- Fig(2-1) Shown that the a: rod ingots, b: plate ingots. -a- -b- Fig. (2-2) Shown that the specimens of impact test , a: before fracture , b: after fracture. Vickers Hardness (kg/ mm2 ) Fig. (3-1) Variation of hardness of A alloy sample (quenching in a: water medium, b: 30% polyethylene glycol medium ) with ageing temperature at 150°C. Vickers Hardness ( kg/mm2) Fig. (3-2) Variation of hardness of B alloy sample ( quenching in a: water medium, b: 30% polyethylene glycol medium ) with ageing temperature at 150°C. Fig. (3-3) Variation of energy absorbed of A alloy sample ( quenching in a: water medium, b: 30% polyethylene glycol medium ) with ageing temperature at 150°C . Fig. (3-4) Variation of energy absorbed of B alloy sample ( quenching in a: water medium, b: 30% polyethylene glycol medium ) with ageing temperature at 150°C . Fig. (3-5) Tafel curve for A alloy ( base alloy) that quenched in water. Fig. (3-6) Tafel curve for A alloy ( base alloy) that quenched in 30% PAG. Fig. (3-7) Tafel curve for B alloy ( containing Zr) that quenched in water. Fig. (3-8) Tafel curve for B alloy ( containing Zr) that quenched in 30% PAG.

Google Scholar