【摘要】 利用扫描电镜、X射线衍射仪、万能试验机研究了脉冲磁场时效处理对ZL205A铝合金显微组织和力学性能的影响。结果表明，脉冲磁场在ZL205A铝合金时效过程中，增加了空位形成能ΔS_V,原子扩散更容易，使得时效后，基体中出现均匀细小的析出相。经脉冲磁场时效处理(195℃×4 h)后，抗拉强度和伸长率分别为408 MPa和11%,与某工厂常规时效工艺(155℃×9 h)相比，抗拉强度基本持平，伸长率提高了64%,时效时间缩短了55%。更多还原

【Abstract】 Effect of aging under pulsed magnetic field on microstructure and mechanical properties of ZL205A aluminum alloy was studied by means of scanning electron microscope, X-ray diffractometer and universal testing machine. The results show that the pulsed magnetic field increases the vacancy formation energy ΔS_V during the aging process of the ZL205A aluminum alloy, and the atomic diffusion is easier, which leads to the appearance of uniform and fine precipitation phases in the matrix after aging. After the pulsed magnetic field aging treatment(195 ℃×4 h), the tensile strength and elongation are 408 MPa and 11%, respectively. Compared with the conventional aging treatment(155 ℃×9 h) in a factory, the tensile strength is basically the same, the elongation is 64% higher and the aging time is 55% shorter.更多还原