Researchers at Penn State University have uncovered a surprising way that atoms in advanced alloys, specifically multi-principal element alloys (MPEAs), arrange themselves during the solidification process. This discovery could enable engineers to fine-tune these materials for enhanced performance in various applications, such as advanced power plants and aerospace technologies.
MPEAs differ from traditional alloys by consisting of multiple principal elements in nearly equal atomic ratios, which results in unique properties like toughness at extreme temperatures. One key finding of the study is the formation of short-range order (SRO) during solidification, which was previously thought to occur only during the annealing process. SRO involves atoms clustering in a specific non-random arrangement over short distances, influencing the alloy’s properties, such as strength and conductivity.
The research showed that SRO forms even at extremely high cooling rates, contrary to previous beliefs. This insight provides a new dimension to engineering MPEAs, potentially allowing for the control of material properties through mechanical deformation or radiation damage. This advancement opens up possibilities for creating more efficient and tailored materials for critical structural applications.
For more detailed information, you can read the full article on Penn State’s website: