Abstract
Additively manufactured (AM) Al alloys have widespread applications. Their high-temperature mechanical behaviors are also of significant interest. In this study, we investigated the microstructure and mechanical behavior of Al-2Ti-2Fe-2Co-2Ni (at%) alloy processed by laser powder bed fusion. The as-printed alloy contains a distinctive heterogeneous microstructure characterized by nanoscale intermetallic lamellae arranged in rosette patterns in the Al matrix. Notably, this alloy exhibits high tensile strength and thermal stability up to 500 °C as revealed by in-situ tension studies in a scanning electron microscope. The enhanced high temperature performance can be attributed to a substantial volume fraction of well-dispersed, nanoscale stable intermetallic particles.
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