本文采用指数叠加法研究了2090铝锂合金的各向异性和稀土Ce的作用.研究结果表明:在2090铝锂合金中,T1相在纵向强化作用最小,在横向最大,在短横向居中;而δ′相则在时效早期增强各向异性.稀土Ce对铝锂合金的各向异性的影响有双重性:一方面,Ce加强了铝锂合金的形变织构,即增强各向异性;另一方面,Ce主要减小了T1相对横向的强化贡献,并减小了δ′相在不同方向强化贡献的差别,从而在一定程度上减弱各向异性.
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