Abstract
Al-4.0Cu-1.4Mg-0.6Mn (2E12) and Al-4.0Cu-1.4Mg-0.6Mn-0.3Zr aluminum billets were manufactured by soft-contact electromagnetic continuous casting (EMC). Subsequent forging and heat treatment were conducted and the effects of Zr on the microstructure and properties of the Al-4.0Cu-1.4Mg-0.6Mn alloy were studied. The results show that the addition of 0.3% Zr can reduce the dendrite and refine grains. During forging and solution treatment, fine and dispersive Al3Zr particles precipitated from the supersaturated α (Al) solid solution in the heating process of the billet can effectively pin dislocations and subgrain boundaries. Because of the addition of Zr, the mechanical properties are improved with the tensile strength, yield strength, elongation, and contraction of the area increasing by 5.4%, 11.3%, 9.7%, and 12.6%, respectively. Moreover, under the condition of R = 0.1, the fatigue crack growth rate (da/dN) of the Al-4.0Cu-1.4Mg-0.6Mn-0.3Zr alloy is lower than that of the Al-4.0Cu-1.4Mg-0.6Mn alloy.
Article PDF
Similar content being viewed by others
Avoid common mistakes on your manuscript.
References
Heinz A., Haszler A., Keidel C., Moldenhauer S., Benedictus R., and Miller W.S., Recent development in aluminum alloys for aerospace application, Mater. Sci. Eng. A, 2000, 280(1): 102.
Staley J.T., Liu J., and Hunt W., Aluminum alloys for aerostructures, Adv. Mater. Processes, 1997, 152(4): 17.
Cassada W., Liu J., and Staley J., Aluminum alloys for aircraft structure, Adv. Mater. Processes, 2002, 160(12): 27.
Iau J. and Kulak M., A new paradigm in the design of aluminum alloys for aerospace applications, Mater. Sci. Forum, 2000, 331/337: 127.
ASTM, Standard test method for exfoliation corrosion susceptibility in 2xxx and 7xxx series aluminum alloys (EXCO test), USA, 1985.
Nakai M. and Eto T., New aspects of development of high strength aluminum alloys for aerospace applications, Mater. Sci. Eng. A, 2000, 285(1): 62.
Starke E.A. Jr and Staleyt J.T., Application of modern aluminum alloys to aircraft, Prog. Aerospace Sci., 1996, 32(2–3): 131.
Polmear I.J. and Couper M.J., Design and development of an experimental wrought aluminum alloy for use at elevated temperatures, Metall. Mater. Trans. A, 1988, 19(4): 1027.
Frindlyyander I.N., Translated by Yao Y.Z., Wrought Structural Aluminum Alloys, Scientific and Technology Literature Publishing House, Chongqing, 1989: 153.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Wang, J., Fang, C., Hao, H. et al. Effects of trace Zr on the microstructure and properties of 2E12 alloy. Rare Metals 28, 511–515 (2009). https://doi.org/10.1007/s12598-009-0099-y
Received:
Revised:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s12598-009-0099-y