Effects of solution and aging treatments on mechanical properties and microstructure of Al-Cu-Mn-Er cast alloy

doi:10.13251/j.issn.0254-6051.2022.06.002

Abstract

Abstract: Effects of different solution and aging treatments on microstructure and mechanical properties of Al-Cu-Mn-Er alloy were studied by optical microscope, scanning electron microscope, XRD, DSC test, hardness test and tensile test. The results show that the optimal process of solution and aging treatments of the as-cast alloy is solution treating at 540 ℃ for 12 h and aging at 185 ℃ for 6 h, under which there is no overheating or "overburning" phenomena, the solute atoms are fully diffused, and a large amount of residual phases generated during the casting process are redissolved into the matrix. Meanwhile, the alloy has the highest hardness value of 142.28 HV0.1, tensile strength of 370.37 MPa, yield strength of 300.34 MPa, and elongation of 6.50%.

Key words: Al-Cu-Mn-Er cast alloy, solid solution treatment, aging treatment, mechanical properties

CLC Number:

TG166.3

Wu Yang, Huang Hui, Shi Wei, Wen Shengping, Wu Xiaolan, Rong Li, Wei Wu. Effects of solution and aging treatments on mechanical properties and microstructure of Al-Cu-Mn-Er cast alloy[J]. Heat Treatment of Metals, 2022, 47(6): 7-12.

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