Precipitation behavior and recrystallization of Al-Fe-Cu alloy wire during annealing

doi:10.13251/j.issn.0254-6051.2025.05.029

Abstract

Abstract: Microstructure and properties, the precipitation behavior of Fe and recrystallization of matrix of the Al-1.09Fe-0.174Cu alloy wire during annealing were studied by means of resistivity test at 20 ℃, tensile test, optical microscope and scanning electron microscope. The results show that the Fe element in the drawn wire exists in the form of supersaturated solid solution in addition to dispersed Fe-rich phases. After annealing at 280-380 ℃ for 6 h, the solid solution content of Fe is still 0.030%. After annealing at 280, 320, 380 ℃ for 60 min, the tensile strength of the alloy is 141, 134 and 129 MPa, and the resistivity is 28.874, 28.590 and 28.568 nΩ·m, respectively. During the annealing process at 280-380 ℃, the precipitation of Fe-rich phases is interwoven with the recrystallization of matrix. The recrystallization structure of wire is elongated grains with Fe-rich phases distributed within the grain.

Key words: Al-Fe-Cu aluminum alloy, wire, microstructure, properties, precipitation behavior, recrystallization

CLC Number:

TG166.3

Chen Rui, Chen Baoan, Li Menglin, Han Yu, Zhu Zhixiang, Hou Shixiang, Yang Changlong, Zheng Wei. Precipitation behavior and recrystallization of Al-Fe-Cu alloy wire during annealing[J]. Heat Treatment of Metals, 2025, 50(5): 189-194.

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