通过光学、透射电子显微、蠕变与室温拉伸实验研究了2124铝合金板的蠕变时效行为与力学性能.结果表明:185℃/150MPa条件下,经固溶-淬火处理(QCA)板材的蠕变机制从位错增殖发展为位错增殖-消毁平衡,其蠕变曲线第一阶段与第二阶段分界点较为明显；而经固溶-淬火-预压缩处理(PCA)板材的蠕变机制主要为预压缩引入的位错消毁,蠕变曲线第一阶段特征并不明显.蠕变时效过程中,S'相的析出总是伴随着位错线形核,其析出方位受位错运动机制的影响,PCA处理初期,经预压缩引入的位错缠结使S'相可以在互相垂直的{210}面上析出,从而抑制了S '相的位向效应.PCA处理试样的力学性能优于该合金的T6和T87状态的,且各向异性小于QCA处理的.
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