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| Review of Microalloying Effects on High Temperature Al3X Precipitates in Al Alloys |
| WANG Yu1 , WANG Junsheng 1,2, XUE Chengpeng1 , WANG Shuo1 , CHEN Dongxu1 , ZHANG Chi1 |
| (1. School of Materials Science & Engineering, Beijing Institute of Technology, Beijing 100081, China; 2. Advanced Research Institute for Multidisciplinary Science, Beijing Institute of Technology, Beijing 100081, China) |
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Abstract Al alloys are widely used in aerospace industries, but their high-temperature strength still cannot match with steels. Addition of transition metals and rare earth elements can effectively control the precipitation strengthening phases (Al3X) in Al alloys under high temperature conditions, and therefore their high-temperature mechanical properties can be improved significantly. This paper summarizes the current research progresses of the influence of microalloying elements on the high temperature precipitation strengthening of Al alloys. Combined with first-principles calculation, the latest developments in the thermodynamic parameters and properties of Al3X strengthening phase are described.
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2021, 
