Effect of Be, Zr and Heat Treatment on Mechanical Behavior of Cast Al-Mg-Zn-Cu Alloys (7075)
The present study was undertaken to investigate the
effect of aging parameters (time and temperature) on the mechanical
properties of Be-and/or Zr- treated Al-Mg-Zn (7075) alloys. Ultimate
tensile strength, 0.5% offset yield strength and % elongation
measurements were carried out on specimens prepared from cast and
heat treated 7075 alloys containing Be and/or Zr. Different aging
treatment were carried out for the as solution treated (SHT)
specimens (after quenching in warm water). The specimens were
aged at different conditions; Natural and artificial aging was carried
out at room temperature, 120C, 150C, 180C and 220C for different
periods of time. Duplex aging was performed for SHT conditions
(pre-aged at different time and temperature followed by high
temperature aging). Ultimate tensile strength, yield strength and %
elongation data results as a function of different aging parameters are
analysed. A statistical design of experiments (DOE) approach using
fractional factorial design is applied to acquire an understanding of
the effects of these variables and their interactions on the mechanical
properties of Be- and/or Zr- treated 7075 alloys. Mathematical
models are developed to relate the alloy mechanical properties with
the different aging parameters.
[1] T.D. Rostova, V.G. Davydov, V.I. Yelagin, and V.V. Zakharov,
Materials Science Forum, 331-337 (2000) 793-798.
[2] F.A. Costello, J.D. Robson and P.B. Prangnell, Mater. Sci. Forum, 396-
402 (2002) 757-762.
[3] J.D. Robson and P.B. Prangnell, Mater. Sci. Technol., 18 (2002) 607.
[4] B. Morere, C. Maurice, R. Shahani, and J. Driver, Met.Mater.Trans.A.,
32A (2001) 625.
[5] Y.W. Riddle and T.H. Sanders Jr., Materials Science Forum, 331-337
(2000) 939-944.
[6] W.V. Youdelis and W. Fang“Effect of beryllium on age hardening,
defect structure, and S′ formation in Al–2·5Cu–1·2Mg alloy’, Materials
Science and Technology, Volume 10, Issue 12 (01 December 1994), pp.
1031-1043.
[7] T. Xiao; W. V. Youdelis “Effect of beryllium and calcium on aging
behaviour of Al–0·75Mg–0·5Si alloy” Materials Science and
Technology, Volume 5, Issue 10 (01 October 1989), pp. 991-994.
[8] Paih-Shiarng Wang, Sheng-Long Lee, Jing-Chie Lin and Min-Ten
Jahn“Effects of solution temperature on mechanical properties of 319.0
aluminum casting alloys containing trace beryllium”, Journal of
Materials Research, Vol. 15, Issue 09, 2000, pp 2027-2035.
[9] I.J. Polmear, “Recent Developments in Light Alloys,” Materials
Transactions, JIM, 37(1) (1996), 12-31.
[10] H.Y. Hunsicker, “Development of Al-Zn-Mg-Cu Alloys for Aircraft,”
Proceeding Rosenhain Century Conference, Metals Society, London,
(1976), 359-376.
[11] J.T. Staley, “History of Wrought-Aluminium-Alloy Development,”
Aluminium Alloys: Contemporary Research and Applications, Treaties
on Materials Science and Technology, Academic Press, 31 (1989), 3-31.
[12] Patent No. EP0377779B2, “Aluminum Alloy Product Having Improved
Combinations of Strength, toughness and Corrosion Resistance,” New
European Patent Specification, Bulletin 2001/36, 5 September 2001.
[13] N.E. Paton and A.W. Sommer, “Influence of Thermomechanical
Processing Treatments on Properties of Aluminum Alloys,” Proceeding
Third international Conference on Strength of Metals and Alloys, Metals
Society, London, 1 (1973), 101-108.
[14] A. Yamamoto et al., “Calorimetric and Resistivity Study of formation
and Redissolution of Precipitates in 7050 Aluminum Alloy,” Materials
Transactions, JIM, 39 (1) (1998), 69-74.
[15] A. Joshi, C.R. Shastry and M. Levy, “Effect of Heat Treatment on
Solute Concentration at Grain Boundaries in 7075 Aluminum Alloy,”
Metallurgical Transactions A, 12 (A) (1981), 1081-1088. [16] M.E. Fine, “Precipitation Hardening of Aluminum Alloys,”
Metallurgical TransactionsA, 6 (A) (1975), 625-630.
[17] J.K. Park and A.J. Ardell, “Microstructures of the Commercial 7075 Al
Alloy in the T651 and T7 Tempers,” Metallurgical Transactions A, 14
(A) (1983), 1957-1965.
[18] A. Karaaslan, I. Kaya and H. Atapek, “Effect of Aging Temperature and
of Retrogression Treatment Time on the Microstructure and Mechanical
Properties of Alloy AA 7075,” Metal Science and Heat Treatment, 49
(9-10) (2007), 443-447.
[19] J.K. Park and A.J. Ardell, “Effect of Retrogression and Reaging
treatments on the Microstucture of Al-7075-T651,” Metallurgical
Transactions A, 15 (A) (1984), 1531- 1543.
[20] S.V. Emani et al., “Double Aging and Thermomechanical Heat
Treatment of AA 7075 Aluminum.
[21] Montgomery, D. (1991), Design and analysis of experiments, 3rd Edn.,
270-569, New York, John Wiley & Sons.
[22] Berthouex, P., Brown, L. (2002), Statistics for environmental engineers,
2nd Edn, 185-276, New York, Lewis Publishers.
[23] Major, J., McLeod, A., Rutter, J. (2000), AFS Transactions, Vol. 108,
287-296.
[24] Ganguly, R., Dhindaw, B., Dhar, P. (1977), Trans. Jpn. Inst. Met., Vol.
17, 511-519.
[25] Hatch, J.E. (Ed.), Aluminium Properties and Physical Metallurgy, 1 st.
ed., American Society for Metals, Metals Park, Ohio (1988).
[1] T.D. Rostova, V.G. Davydov, V.I. Yelagin, and V.V. Zakharov,
Materials Science Forum, 331-337 (2000) 793-798.
[2] F.A. Costello, J.D. Robson and P.B. Prangnell, Mater. Sci. Forum, 396-
402 (2002) 757-762.
[3] J.D. Robson and P.B. Prangnell, Mater. Sci. Technol., 18 (2002) 607.
[4] B. Morere, C. Maurice, R. Shahani, and J. Driver, Met.Mater.Trans.A.,
32A (2001) 625.
[5] Y.W. Riddle and T.H. Sanders Jr., Materials Science Forum, 331-337
(2000) 939-944.
[6] W.V. Youdelis and W. Fang“Effect of beryllium on age hardening,
defect structure, and S′ formation in Al–2·5Cu–1·2Mg alloy’, Materials
Science and Technology, Volume 10, Issue 12 (01 December 1994), pp.
1031-1043.
[7] T. Xiao; W. V. Youdelis “Effect of beryllium and calcium on aging
behaviour of Al–0·75Mg–0·5Si alloy” Materials Science and
Technology, Volume 5, Issue 10 (01 October 1989), pp. 991-994.
[8] Paih-Shiarng Wang, Sheng-Long Lee, Jing-Chie Lin and Min-Ten
Jahn“Effects of solution temperature on mechanical properties of 319.0
aluminum casting alloys containing trace beryllium”, Journal of
Materials Research, Vol. 15, Issue 09, 2000, pp 2027-2035.
[9] I.J. Polmear, “Recent Developments in Light Alloys,” Materials
Transactions, JIM, 37(1) (1996), 12-31.
[10] H.Y. Hunsicker, “Development of Al-Zn-Mg-Cu Alloys for Aircraft,”
Proceeding Rosenhain Century Conference, Metals Society, London,
(1976), 359-376.
[11] J.T. Staley, “History of Wrought-Aluminium-Alloy Development,”
Aluminium Alloys: Contemporary Research and Applications, Treaties
on Materials Science and Technology, Academic Press, 31 (1989), 3-31.
[12] Patent No. EP0377779B2, “Aluminum Alloy Product Having Improved
Combinations of Strength, toughness and Corrosion Resistance,” New
European Patent Specification, Bulletin 2001/36, 5 September 2001.
[13] N.E. Paton and A.W. Sommer, “Influence of Thermomechanical
Processing Treatments on Properties of Aluminum Alloys,” Proceeding
Third international Conference on Strength of Metals and Alloys, Metals
Society, London, 1 (1973), 101-108.
[14] A. Yamamoto et al., “Calorimetric and Resistivity Study of formation
and Redissolution of Precipitates in 7050 Aluminum Alloy,” Materials
Transactions, JIM, 39 (1) (1998), 69-74.
[15] A. Joshi, C.R. Shastry and M. Levy, “Effect of Heat Treatment on
Solute Concentration at Grain Boundaries in 7075 Aluminum Alloy,”
Metallurgical Transactions A, 12 (A) (1981), 1081-1088. [16] M.E. Fine, “Precipitation Hardening of Aluminum Alloys,”
Metallurgical TransactionsA, 6 (A) (1975), 625-630.
[17] J.K. Park and A.J. Ardell, “Microstructures of the Commercial 7075 Al
Alloy in the T651 and T7 Tempers,” Metallurgical Transactions A, 14
(A) (1983), 1957-1965.
[18] A. Karaaslan, I. Kaya and H. Atapek, “Effect of Aging Temperature and
of Retrogression Treatment Time on the Microstructure and Mechanical
Properties of Alloy AA 7075,” Metal Science and Heat Treatment, 49
(9-10) (2007), 443-447.
[19] J.K. Park and A.J. Ardell, “Effect of Retrogression and Reaging
treatments on the Microstucture of Al-7075-T651,” Metallurgical
Transactions A, 15 (A) (1984), 1531- 1543.
[20] S.V. Emani et al., “Double Aging and Thermomechanical Heat
Treatment of AA 7075 Aluminum.
[21] Montgomery, D. (1991), Design and analysis of experiments, 3rd Edn.,
270-569, New York, John Wiley & Sons.
[22] Berthouex, P., Brown, L. (2002), Statistics for environmental engineers,
2nd Edn, 185-276, New York, Lewis Publishers.
[23] Major, J., McLeod, A., Rutter, J. (2000), AFS Transactions, Vol. 108,
287-296.
[24] Ganguly, R., Dhindaw, B., Dhar, P. (1977), Trans. Jpn. Inst. Met., Vol.
17, 511-519.
[25] Hatch, J.E. (Ed.), Aluminium Properties and Physical Metallurgy, 1 st.
ed., American Society for Metals, Metals Park, Ohio (1988).
@article{"International Journal of Chemical, Materials and Biomolecular Sciences:69116", author = "Mahmoud M. Tash", title = "Effect of Be, Zr and Heat Treatment on Mechanical Behavior of Cast Al-Mg-Zn-Cu Alloys (7075)", abstract = "The present study was undertaken to investigate the
effect of aging parameters (time and temperature) on the mechanical
properties of Be-and/or Zr- treated Al-Mg-Zn (7075) alloys. Ultimate
tensile strength, 0.5% offset yield strength and % elongation
measurements were carried out on specimens prepared from cast and
heat treated 7075 alloys containing Be and/or Zr. Different aging
treatment were carried out for the as solution treated (SHT)
specimens (after quenching in warm water). The specimens were
aged at different conditions; Natural and artificial aging was carried
out at room temperature, 120C, 150C, 180C and 220C for different
periods of time. Duplex aging was performed for SHT conditions
(pre-aged at different time and temperature followed by high
temperature aging). Ultimate tensile strength, yield strength and %
elongation data results as a function of different aging parameters are
analysed. A statistical design of experiments (DOE) approach using
fractional factorial design is applied to acquire an understanding of
the effects of these variables and their interactions on the mechanical
properties of Be- and/or Zr- treated 7075 alloys. Mathematical
models are developed to relate the alloy mechanical properties with
the different aging parameters.
", keywords = "Casting, Aging Treatment, Mechanical Properties,
Al-Mg-Zn (7075) alloys, Be- and/or Zr-Treatment, Experimental
Correlation.", volume = "9", number = "1", pages = "180-9", }
