Hyper-Range Amorphization Unlocks Superior Damage Tolerance in Alloys

Jinliang Du, Shukuan Guo, Hangqi Feng, Changhong Linghu, Weijie Li (), Pei Wang and Ying Li ()
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Jinliang Du: Wuhan University of Technology, School of Naval Architecture, Ocean and Energy Power Engineering
Shukuan Guo: Chinese Academy of Sciences, State Key Laboratory of Functional Crystals and Devices, Shanghai Institute of Ceramics
Hangqi Feng: Wuhan University of Technology, School of Naval Architecture, Ocean and Energy Power Engineering
Changhong Linghu: City University of Hong Kong, Department of Mechanical Engineering, College of Engineering
Weijie Li: Beijing Institute of Technology
Pei Wang: Technology and Research (A*STAR), Institute of Materials Research and Engineering (IMRE), Agency for Science
Ying Li: Beijing Institute of Technology

Nature Communications, 2025, vol. 16, issue 1, 1-14

Abstract: Abstract Shear bands dictate the failure mechanisms of alloys across various strain rates and limit the damage tolerance of the alloy. While short-range amorphization has the potential to mitigate shear effects, it has thus far been confined to the nanoscale. Here, we extend amorphization to the micrometer scale, fundamentally replacing shear-dominated failure in multi-principal element alloy micropillars. We implement continuous compression strain-training from low to high strain rates, generating a top-down high-density dislocation gradient that drives the formation of a topological disorder network, extending over one-third of the micropillar height, which we define as hyper-range amorphization. Within the amorphous bands, atoms exhibit dynamic disorder, and the lattice rearranges and recovers, dissipating shear stress. The alloy achieves an ultimate compressive strength of ceramic level ( ~ 6.5 GPa), while maintaining ~59.1% plasticity. This work reveals a strain engineering-based mechanical mechanism for extending amorphization, establishing it as a viable pathway to enhancing the structural stability and energy dissipation capacity of alloys.

Date: 2025
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DOI: 10.1038/s41467-025-65379-7

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