Microstructure and Mechanical Properties of a CuCrZr Welding Joint After Continuous Extrusion

doi:10.1016/j.jmst.2014.03.025

Abstract

Abstract: The effect of continuous extrusion forming (CEF) process on the microstructure and mechanical properties of a CuCrZr welding joint was investigated. The experimental results showed that after the CEF process the grains were refined to submicron-scale through dynamic recrystallization, which improved the mechanical properties of the welding joint as well as the base material. Meanwhile, the micron-scale precipitates aggregated at the grain boundaries in the welding process were broken down to smaller ones and recrystallized grains of several micrometers formed around the precipitates after CEF process, which could alleviate the negative effect induced by the micron-scale precipitates during plastic deforming process. Finer grains and smaller micron-scale precipitates made contributions to improve the properties of a CuCrZr alloy with a welding joint.

Key words: Continuous extrusion, Dynamic recrystallization, Flash butt welding, Precipitate

Hui Feng, Haichang Jiang, Desheng Yan, Lijian Rong. Microstructure and Mechanical Properties of a CuCrZr Welding Joint After Continuous Extrusion[J]. J. Mater. Sci. Technol., 2015, 31(2): 210-216.

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Microstructure and Mechanical Properties of a CuCrZr Welding Joint After Continuous Extrusion

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