【摘要】 铝合金作为重要的结构材料，如果能在中温区间（200～450℃）部分取代钛基合金，则可产生十分显著的轻量化作用。其中Al-Ce合金可通过共晶反应生成大体积分数的耐热共晶相，从而使合金保持高的热稳定性。此外，Al-Ce合金还具有良好的铸造性及抗蠕变性，但其拉伸性能并不出众，故尝试许多改进方法以期提高拉伸性能，包括提高冷却速度、改变铸造条件、细化晶粒；对铸造后的合金进行变形与热处理，改善其微观结构；添加合金元素（Mg、Mn、Ni、Sc、Zr），通过固溶时效处理改变第二相，析出沉淀等；多种改善方法共同作用，进一步提升合金性能，提高服役温度。本文总结了近10年的Al-Ce研究进展，分别从上述几个方面进行详细阐述，同时希望为后续Al-Ce合金的发展提供一定的帮助。更多还原

【Abstract】 As a kind of the important structural materials,aluminum alloys can have a significant lightweighting effect if it can partially replaces titanium based alloys in the medium temperature range(200—450 ℃).Al-Ce alloy can generate large volume fractions of heat-resistant eutectic phases through eutectic reactions,which makes the alloy have high thermal stability.In addition,Al-Ce alloy also has good castability and creep resistance,but its tensile properties are not outstanding.Therefore,many improvement methods have been attempted to improve the tensile properties,including increasing the cooling rate and changing the casting conditions,so as to refine grain size;post-casting deformation and heat treatment to improve its microstructure;adding alloying elemnts,such as Mg,Mn,Ni,Sc,Zr,etc.,to change the second phase and precipitate through solid solution aging treatment;as well as the synergistic effects of various improvement methods to futher elevate alloy performance and increase serivice temperature.This paper summarizes the research progress of Al-Ce in the last decade and elaborates on the above aspects respectively,and also hopes to provide some help for the subsequent development of Al-Ce alloys.更多还原