Cycling-induced evolution of transformation strain bands in superelastic NiTi
Source abstract
Abstract
Cyclic super elasticity in shape memory alloys (SMAs) is governed by complex transformation mechanisms that evolve under repeated loading, yet these stabilization effects remain insufficiently resolved at the full-field scale. This work presents an experimental investigation of the cyclic superelastic response of Nitinol subjected to 77 loading cycles, with particular emphasis on the progression of stress-induced martensitic transformation. High-resolution digital image correlation (DIC) was employed to capture in-situ strain localization and the corresponding evolution of transformation morphology. The full-field measurements reveal distinct changes in transformation band formation, propagation, and recovery as cyclic stabilization develops. Local strain evolution was further analyzed to elucidate micromechanical deformation pathways that influence functional fatigue behavior. The results provide new insight into the spatially heterogeneous deformation characteristics of Nitinol under cyclic superelastic loading, offering experimentally grounded evidence critical for advancing intelligent material systems and their reliability in repetitive actuation or structural applications.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Shape Memory Alloy Transformations · Ferroelectric and Piezoelectric Materials · Nonlocal and gradient elasticity in micro/nano structures
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Department of Mechatronics Engineering, Istanbul Gedik University, Türkiye
Robot Technologies Research & Application Center, Istanbul Gedik University, Türkiye
Department of Engineering, University of Southern Maine, Gorham, ME, USA
Composites Engineering Research Laboratory (CERL), University of Southern Maine, Portland, ME, USA
Funding
Scientific and Technological Research Council of Türkiye · National Science Foundation · Maine Economic Improve Fund · University of Southern Maine’s Undergraduate Research Opportunities (UROP) program
References (36)
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