Hot workability and constitutive model of the Cu-Zr-Nd alloy. (December 2017)

• Record Type: Journal Article
• Authors: Zhang, Yi; Sun, Huili; Volinsky, Alex A.; Tian, Baohong; Song, Kexing; Wang, Bingjie; Liu, Yong
• Is Part Of: Vacuum. Volume 146(2017)
• Page Start: 35
• Page End: 43
• Publication Date: 2017-12
• Subjects: Hot deformation -- Cu-Zr-Nd alloy -- Processing map -- Constitutive equation; Vacuum -- Periodicals; 621.55
• DOI: 10.1016/j.vacuum.2017.09.017
• Languages: English
• ISSNs: 0042-207X

Abstract

Abstract: Hot deformation behavior of the Cu-Zr-Nd alloy was studied by using compressive tests in the temperature range of 550–900 °C and the strain rate range of 0.001–10 s −1 on the Gleeble-1500D thermo-mechanical simulator. The Cu-Zr-Nd alloy flow stress increased at higher strain rate and lower temperature. Based on the processing maps and microstructure, the optimal processing parameters for the Cu-Zr-Nd alloy are determined as 750-870 °C and 0.001–0.03 s −1 . The addition of Nd can promote the dynamic recrystallization. A new constitutive model, which compensates for the strain rate, is established according to the Arrhenius-type equation. The Zener-Hollomon parameter was also modified to compensate for the strain rate. The flow stress predicted by the constitutive equation is consistent with the experimental flow stress. Highlights: Hot deformation and dynamic recrystallization of the Cu-Zr-Nd alloy were studied. The optimal processing parameters for the Cu-Zr-Nd alloy were determined. The addition of Nd can improve the dynamic recrystallization of Cu- Zr alloy. Flow stress predicted by the constitutive equation is consistent with the experiment.