不同热处理温度下薄壁纯铜管的Goss织构演变规律

采用电子背散射衍射(EBSD)及拉伸试验等方法研究薄壁铜管在热处理过程中显微组织、织构及力学性能的演变规律.结果表明:初始拉拔态铜管组织中以Copper和Y型织构为主,随着温度升高逐渐转变为强烈的Goss型织构.通过高分辨显微组织表征手段可以发现,具有Goss取向的再结晶晶粒分别以不同的机制在Copper取向和Y取向变...

Evolution of Goss texture in thin-walled copper tube at different heat treatment temperatures

The evolution of microstructure, textures, and mechanical properties of thin-walled copper tube during heat treatment was investigated using EBSD technique and tensile test. The results show that the initial deformation textures of pre-drawn thin-walled copper tube are mainly composed of Copper and Y components, while with the increase of temperatures, the textures are transformed into a strong Goss texture gradually. The high-resolution microstructural characterizations indicate that the new Goss recrystallized grains nucleate and grow up within the deformed Copper grains and Y grains in different mechanisms, respectively. The tensile strength of the thin-walled copper tube decreases gradually with the increase of the temperature, while the elongation increases first and then decreases sharply due to the action of grain sizes and texture components.