Anisotropy of microstructure and properties of Al-Cu-Mg-Sc alloy

doi:10.13251/j.issn.0254-6051.2020.06.026

Abstract

Abstract: Microstructure and tensile properties of Al-Cu-Mg-Sc alloy sheet with different states at different orientations were investigated by means of microstructure analysis, tensile test and XRD analysis. The results show that the strengths of both the final rolled and the final aged alloy sheet in the direction of 0° with the rolling direction are higher than those of in the direction of 30°, 45°, 60° and 90°, as well as the elongation is higher. The anisotropic index value I_PA of the final aged alloy sheet is smaller than that of the final rolled one, and the performance is relatively uniform. R_m, R_p0.2and A along RD direction (0°) are 622.85 MPa, 529.38 MPa and 13.33%, respectively, and the comprehensive performance is excellent. The difference in the precipitation of the second phase in the two states affects the planar anisotropy of the alloy sheet. Schmid factor analysis show that the final rolled sheets contain (110)[111] and (001)[310] texture components, while the final aged sheets contain (110)[111], (001)[310] and (011)[100] texture component.

Key words: Al-Cu-Mg-Sc alloy, planar anisotropy, microstructure, mechanical properties

CLC Number:

TG146.4⁺51

Li Wangzhen, Sun Youping, He Jiangmei, Hu Yijie, Wan Siyu. Anisotropy of microstructure and properties of Al-Cu-Mg-Sc alloy[J]. Heat Treatment of Metals, 2020, 45(6): 119-123.

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