电场时效对2014铝合金的微观组织和力学性能的影响

Effects of electric field aging on microstuctures and mechanical properties of 2014 aluminium alloy

通过拉伸试验、硬度测试、X射线衍射(XRD)分析、扫描电子显微镜(SEM)及透射电子显微镜(TEM)分析技术,研究了170℃×10 h电场时效工艺条件对2014铝合金板的微观组织和力学性能的影响.实验结果表明,电场时效有助于提高2014铝合金板的屈服强度和硬度,而且2014铝合金板的屈服强度和硬度随电场强度的升高而增加.电场时效使2014铝合金板的主织构由非电场时效的{001}<110>织构转变为{001}<210>织构,且{001}<210>织构的强度呈现出随电场强度升高而增强的趋势.电场时效2014铝合金板的屈服强度和硬度的提高主要归因于其微观组织和织构的转变.

Effects of electric field aging at 170 ℃× 10 hrs on microstructures and mechanical properties of 2014 aluminium alloy sheet were studied by means of tensile test, hardness measurement, X -ray diffraction analysis, and electron microscopy. The result shows that electric field aging is useful to increase hardness and yield strength of 2014 aluminium alloy sheet, and the hardness and yield strength are enhanced with increasing the intensity of electric field. The texture type of 2014 aluminium alloy sheet transformed from {001} 〈 110 〉 without electric field aging to {001} 〈210 〉 with electric field aging, and the intensity of {001 } 〈210 〉 was increased with increasing of electric field intensity. The increasing of the hardness and yield strength of 2014 aluminium alloy sheet with electric field aging are mainly due to evolution of microstructure and transformation of texture.