High-strength gradient Ti-Ni-Cu-Pd ribbon with large recoverable strain and high cyclic stability under load
Abstract
Bulk Ti–Ni–Cu–Pd alloys show decent thermal- and load-cycling stability, yet low strength and limited recoverable strain. Here, we design a gradient Ti–Ni–Cu–Pd ribbon via nanoscale dual-phase (nanocrystalline–amorphous) engineering. The ribbon achieves 1–2× higher strength than bulk austenite while delivering ∼4% fully recoverable strain (bulk well below 3%). Under high load, the strain amplitude declines only 0.5–0.7% after 10 loading cycles, demonstrating exceptional cyclic stability. These properties arise from phase synergy across the gradient architecture, enabling compact, high-force, repeatable actuators.
Fields of Study & Subjects
Shape Memory Alloy Transformations
Nonlocal and gradient elasticity in micro/nano structures
Advanced Materials and Mechanics
Publication details
- Journal / source
- Materials Research Letters
- Publisher
- Informa UK Limited
- Volume
- 14
- Issue
- 3
- Pages
- 267–275
- Publication date
- 12 January 2026
- Language
- EN