耐热铝基合金研究进展：微观组织设计与析出策略

Many load-bearing industrial settings require light-weight structural materials with adequate strength. Although commercial aluminum (Al) alloys are suitable for room-temperature applications, their strength at elevated temperatures (300-500^oC) is largely reduced by coarsening of the strengthening precipitates. However, high-temperature alternatives such as titanium alloys are much heavier and more expensive than Al alloys. Creating microstructures that remain stable over 300^oC is an important goal of the aluminum-manufacturing community. This article focuses on the recent development of high-temperature resistant Al-based alloys. Especially, it discusses the unique microstructural features, selection criteria of the strengthening phase, alloying effects, and microstructural stabilization of aluminum. The strategies summarized in this review are expected to realize the new microstructural architectures of light-weight alloys, which are currently limited to low-temperature service.