Working Paper Article Version 1 This version is not peer-reviewed

Hot Deformation Behavior of Cu-Sn-La Polycrystalline Alloy Prepared by Upcasting

Version 1 : Received: 2 August 2020 / Approved: 2 August 2020 / Online: 2 August 2020 (17:53:37 CEST)

A peer-reviewed article of this Preprint also exists.

Hua, S.; Zhang, P.; Liu, Z.; Yang, L. Hot Deformation Behavior of Cu–Sn–La Polycrystalline Alloy Prepared by Upcasting. Materials 2020, 13, 3739. Hua, S.; Zhang, P.; Liu, Z.; Yang, L. Hot Deformation Behavior of Cu–Sn–La Polycrystalline Alloy Prepared by Upcasting. Materials 2020, 13, 3739.

Journal reference: Materials 2020, 13, 3739
DOI: 10.3390/ma13173739

Abstract

In this study, the hot deformation of Cu-0.55Sn-0.08La (wt%) alloy was studied by gleeble-3180 testing machine at deformation temperatures of 400-700oC and various strain rates. The stress-strain curve showed that the hot deformation behavior of Cu-0.55Sn-0.08La (wt%) alloy was greatly affected by work hardening, dynamic recovery, and dynamic recrystallization. The activation energy Q was calculated as 287.141 kJ/mol , and hot compression constitutive equation was determined as ε ̇=[sinh(0.006388σ)]^12.123∙exp⁡(37.7505-287.141/RT). The microstructural evolution of the alloy during deformation at 400oC revealed the presence of both slip and shear bands in the grains. At 700oC, dynamic recrystallization grains were observed but recrystallization was incomplete. In sum, these results provided the theoretical basis for continuous extrusion process of alloys with promising future use.

Subject Areas

Cu-Sn-La alloy; stress-strain; hot deformation; constitutive equations; dynamic recrystallization

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