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Improvement Properties of 7075-T6 Aluminum Alloy by Quenching in 30% Polyethylene Glycol and Addition 0.1%B

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Author Affiliations

  • 1University of Babylon, College of Engineering Meterials, IRAQ
  • 2 University of Kufa, College of Engineering, IRAQ

Res. J. Material Sci., Volume 1, Issue (6), Pages 12-17, July,16 (2013)

Abstract

The 7000 series of aluminum alloys are primarily used in the aerospace industry as structural components and are strengthened by age-hardening especially 7075-T6 aluminum alloy. This study aims to improve properties of 7075-T6 such as impact toughness, thermal age hardening behavior and corrosion resistance in 3.5% NaCl solution by using quenching in 30% polyethylene glycol and addition alloying elements, i.e. boron (B) to this alloy. Results showed that the addition 0.1% B to the base alloy improves impact toughness by (30%) when quenching in water, and by (50 %) when quenching in 30%PAG corresponding to the base alloy at aging temperature 150ºC. Also results showed that the thermal age hardening behavior improved when we add0.1% B (b alloy) by (18%) at aging temperature 150ºC in comparison to the base alloy. An improvement of corrosion resistance in 3.5% NaCl solution when adding 0.1%B (b alloy) by (234 %) at aging time 150ºC in comparison to the base alloy.

References

  1. I. Mitchell, ' Residual stress reduction during quenching of wrought 7075 aluminum alloy', Thesis, Worcester Polytechnic Institute, Materials Science and Engineering, (2004)
  2. Zhuo Z. and Kang-hua C., Effect of Yb addition on strength and fracture toughness of Al-Zn-Mg-Cu-Zr aluminum alloy, Journal of science direct, Transactions of Nonferrous Metals Society of China, (2008)
  3. Sverdlin and G. Totten, Cooling media' , Metal Sience and Heat treatment, 38(6), 14-17 (1996)
  4. Sarmiento G., Coscia D., Jouglard C., Totten G., Webster G. and Vega J., Residual stresses, distortion and heat transfer coefficients of 7075 aluminum alloy probes quenched in water and polyalkylene glycol solutions'', ASM International, Materials Park, Ohio, 1118-1124, (2000)
  5. Es-Said O., Ruperto T. and Vasquez S., Warpage behavior of 7075 aluminum alloy extrusions, Journal of Materials Engineering and Performance, ASM International, 16(2), 242-247, (2007)
  6. Bedarev A. and Konyukhov G., Use of water-soluble polymer for quenching aluminum alloys, Translated from Metallovedenie Termicheskaya Obrabotka Metallov, 1, 48-52, (1978)
  7. Srinivasa Rao K. and Prasad Rao K., Pitting corrosion of heat-treatable aluminum alloys and welds: a review, Department of Metallurgical and Materials Engineering, Trans., Indian Inst. Met., 57(6), 593-610 (2004)
  8. Genescaa J., Mendozab J., Duranb R. and Garciab E., Conventional DC electrochemical techniques in corrosion testing, on the web: http://depa.pquim.unam.mx /labcorr/publicaciones/TECC.RpyTafel.pdf. (2013)
  9. ASM Aerospace Specification Metals Inc., ASM Material Data Sheet'', on the web: http://asm.matweb.com/search /SpeciificMaterial.asp?bassnum=MA7075T6 (2013)