Keywords
martensitic transformation
Cu-Al-Ag alloys
How to Cite
Abstract
The influence of the Al content on the phase transformations in Cu-Al-Ag alloys was studied byclassical differential thermal analysis (DTA), optical microscopy (OM) and X-ray diffractometry (XRD).
The results indicated that the increase in the Al content and the presence of Ag decrease the rate of the
β1 phase decomposition reaction and contribute for the raise of this transition temperature, thus decreasing
the stability range of the perlitic phase resulted from the b1 decomposition reaction.
References
ADORNO, A. T.; GUERREIRO, M. R.; BENEDETTI,
A. V. Influence of silver additions on the aging characteristics
of the Cu-10.4at.%Al alloys. J. Alloys Comp., v. 268, p.
-129, 1998.
]ADORNO, A. T.; GUERREIRO, M. R.; BENEDETTI,
A. V. Thermal behavior of Cu-Al alloys near the α-Cu-Al
solubility limit. J. Thermal Anal. Cal., v. 65, p. 221-229,
ADORNO, A. T.; GUERREIRO, M. R.; RIBEIRO, C.
A.; GUERREIRO, C. T. R. Influence of silver additions on
the thermal behavior of the Cu-8wt.%Al alloy. J. Thermal
Anal. Cal., v. 64, p. 1141-1146, 2001.
ARRUDA, G. J.; ADORNO, A. T.; MAGNANI, R.;
BEATRICE, C. R. S. Kinetics of eutectoid decomposition
in Cu-Al and Cu-Al-Ag alloys. Mater. Lett., v. 32, p. 79-84,
COPE, R. G. The tempering of martensite in copper-
aluminum alloys. J. Inst. Metals, v. 87, p. 330-336, 1959.
GAUDIG, W.; WARLIMONT, H. The structure of short
range ordered α-Cu-Al alloys and a new superlattice phase.
Acta Metall., v. 26, p. 709-724, 1978.
KWARCIAK, J. Phase transformation in Cu-Al and
Cu-Zn-Al alloys. J. Thermal Anal., v. 31, p. 559-566, 1986.
KWARCIAK, J.; BOJARSKI, Z.; MORAWIEC, H. Phase
transformation in martensite of Cu-12.4%Al. J. Mater.
Sci., v. 21, p. 788-792, 1986.
[ 9] MASSALSKI, T. B. (Ed.). Binary
alloy phase diagrams 2nd. ed. Metals Park: American Society for Metals, v.1,
p.141-143, 1992.
MURRAY, J. L. The aluminum-copper system. Int.
Met. Rev., v. 30, p. 211-233, 1985.
RUZZANTES, J. E.; KUROKAWA, S.; GARCÌA, E.
A.; DYMENT, F. Diffusion in the β/γ2 interphase boundary
of the Cu-Al system. Acta Metall., v. 28, p. 699-707, 1980.
SWANN, P. R.; WARLIMONT, H. The electron
metallography and crystallography of copper-aluminum
martensites. Acta Metall., v. 11, p. 511-527, 1963
This work is licensed under a Creative Commons Attribution 4.0 International License.
Copyright (c) 2018 Eclética Química Journal