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通过准静态单轴拉伸实验、金相显微镜观察以及XRD宏观织构测试手段研究了三种不同预热温度(20℃,210℃,420℃)对等径角轧制6016铝合金板材的微观组织、织构及力学性能的影响。结果表明:在20℃、210℃、420℃三个温度范围内,随着温度的升高,RT(轧制)态板材的Brass{011}<211>织构、Copper{112}<111>织构、S{123}<634>织构等形变织构取向密度和体积分数降低;T4P(固溶+预时效+自然时效)态板材的Cube{001}<100>织构的取向密度和体积分数逐渐降低,而斯密特因子逐渐升高,织构逐渐离散弱化。在420℃条件下,RT态板材发生动态再结晶,形变织构尚存,但取向密度和体积分数非常低,此外还出现了少量向再结晶织构转变的中间态织构;T4P态板材出现了少量的P{011}<112>织构、Goss{110}<001>织构和其他一些不常见的织构类型,各种织构强度较弱,没有强烈的再结晶织构,织构无序分布。在420℃条件下的T4P态板材具有良好的塑性和成形性,其δ>29%、σ0.2<110MPa、r≈0.75、Δr≈0.16。而T8X(固溶+预时效+自然时效+模拟烤漆硬化)态板材具有良好的烘烤硬化性能,其σ0.2>210MPa、σb>335MPa。
The microstructure of 6016 aluminum alloy sheet with equal angle rolling under three different preheating temperatures (20 ℃, 210 ℃, 420 ℃) was investigated by means of quasi-static uniaxial tensile test, optical microscope and XRD macro texture test. Tissue, texture and mechanical properties of the impact. The results show that the Brass {011} <211> texture, the copper {112} <111> texture of the RT (rolled) sheet increases with the increase of temperature in the three temperature ranges of 20 ℃, 210 ℃ and 420 ℃, Texture orientation, S {123} <634> textures. The orientation density of Cube {001} <100> texture of T4P (solution + pre-aging + natural aging) The volume fraction decreased gradually, while the Schmidt factor gradually increased and the texture gradually weakened. Under the condition of 420 ℃, the dynamic recrystallization of RT sheet occurs, the deformation texture still exists, but the orientation density and volume fraction are very low. In addition, a small amount of intermediate texture changes to the recrystallization texture. The T4P sheet appears A small amount of P {011} <112> texture, Goss {110} <001> texture and some other unusual texture types are weak in all kinds of textures and have no strong recrystallization texture. Disorderly distribution. The T4P plate at 420 ℃ has good plasticity and formability with δ> 29%, σ0.2 <110MPa, r≈0.75 and Δr≈0.16. T8X (solid solution + pre-aging + natural aging + simulated paint hardening) state plate has good bake hardenability, the σ0.2> 210MPa, σb> 335MPa.