Work

In situ nanoscale heterostructure engineering for additive manufacturing of dynamic adaptive alloys

Year: 2025

Type: article

Abstract: range of composites and other micro-/nanolattice metals, demonstrating exceptional resilience. The activation of corresponding variant pairs (CVPs)-twin-related martensitic variants-enhances cyclic phase transformations, prevents stabilized martensite retention, and enables efficient energy absorption. INSHE's nanoengineered heterostructure within the B2 phase promotes multiple synergistic deformation mechanisms that resist shear-induced amorphization and prevent crystalline fragmentation. This results in significantly improved damping capacity, linear elastic behavior across transformation temperatures, and nearly ideal shape recovery, achieving superior actuation efficiency over multicomponent and commercial Snoek-type high-damping alloys. Micro-CT imaging confirms INSHE's superior internal quality and precision in complex geometries, addressing powder adhesion and surface roughness through enhanced powder absorption and thermochemical tuning. INSHE also advances printability by refining powder feedstock design and laser processing parameters. This transformative strategy paves the way for the application of alloys with tailored multifunctional properties in topological architectures, unlocking new possibilities for dynamic adaptive materials with superior structural and functional performance.

Source: Materials Horizons

DOI: 10.1039/d5mh01287b

Authors: Junchao Yi, Gary J. Cheng

Institutions: Wuhan University, Purdue University West Lafayette

Language: English

Topic: Shape Memory Alloy Transformations

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

SDG: Industry, innovation and infrastructure

Open Access status: hybrid

Funder: Wuhan University