Decoding Complex Compositions in Topologically Close-Packed Nano-plates of Magnesium Alloys: A High-Throughput Route to Stable Precipitates

TL;DR

This paper introduces a high-throughput screening method to identify stable topologically close-packed nanoplates in magnesium alloys, providing insights into their formation mechanisms and aiding the design of stronger, creep-resistant materials.

Contribution

A novel two-step high-throughput approach for discovering and understanding TCP nanoplates in Mg alloys, revealing 43 new nanoplates and establishing a framework for alloy design.

Findings

Identified 43 new TCP nanoplates in Mg alloys.

Established a theoretical framework for TCP nanoplate design.

Highlighted the importance of precise compositional characterization.

Abstract

Coherent topologically close-packed nanoplates in magnesium alloys can effectively improve strength and creep resistance.However, the formation mechanisms of several metastable TCP nanoplates remain unclear, and the traditional trial-and-error methods hinder the rapid discovery of novel TCP precipitate strengthened Mg alloys.By integrating the thermodynamic and kinetic conditions for TCP precipitation, we developed a two-step high-throughput screening strategy, identifying 43 previously unreported TCP nanoplates in a series of Mg alloys. These findings highlight the critical need for precise compositional characterization of nanoprecipitates and establish a theoretical framework for designing creep-resistant Mg alloys containing TCP nanoplates.