Pre-deformation and Aging Characteristics of Cu-3Ti-2Mg Alloy. Issue 7 (July 2018)

• Record Type: Journal Article
• Authors: Jia, Liu; Xianhui, Wang; Qianni, Ran; Yanfeng, Liu; Cong, Li
• Is Part Of: Xi you jin shu cai liao yu gong cheng. Volume 47:Issue 7(2018)
• Page Start: 1980
• Page End: 1985
• Publication Date: 2018-07
• Subjects: Cu-Ti alloy -- deformation -- phase transformation -- hardness -- electrical conductivity; Nonferrous metals -- Periodicals; 669.05
• DOI: 10.1016/S1875-5372(18)30168-1
• Languages: English
• ISSNs: 1875-5372

Abstract

Abstract: The effect of cold deformation and aging on the microstructure and properties of Cu-3Ti-2Mg alloy was investigated. The microstructure and phase constituents were characterized by optical microscope (OM), scanning electron microscope (SEM), X-ray diffractometer (XRD), transmission electron microscope (TEM) and electron backscattering diffraction (EBSD), and the hardness and electrical conductivity were measured as well. The results show that the microstructure of as-cast Cu-3Ti-2Mg alloy consists of Cu2 Mg phase, plate-like Cu4 Ti phase and Cu matrix. The microstructural characterizations reveal that the βprime; -Cu4 Ti phase precipitates from the supersaturated Cu matrix during aging. However, excessive aging causes the phase transformation from metastable, coherent βprime; -Cu4 Ti to equilibrium, incoherent Cu3 Ti phases. In the range of experiments, the optimum process for Cu-3Ti-2Mg alloy is solutizing at 700 °C for 4 h, cold deformation of 60%, and aging at 450 °C for 2 h. The electrical conductivity and hardness HV of Cu-3Ti-2Mg alloy are 16.7 %IACS and 3280 MPa, respectively.