为了研究Er对挤压态Al-0.8％ Mg-0.6％ Si合金的低周疲劳行为的影响,进行了总应变控制的室温低周疲劳实验.结果表明,低周疲劳加载条件下,挤压态Al-0.8％ Mg-0.6％ Si和Al-0.8％ Mg-0.6％ Si-0.5％ Er合金主要呈现循环应变硬化现象;Er的添加可以显著提高挤压态Al-0.8％ Mg-0.6％ Si合金的循环变形抗力,但却降低其室温低周疲劳寿命.
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