Mechanical and shape-memory behavior of homogenized NiTiHfPd alloys

ACAR E.

Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications, vol.237, no.5, pp.974-980, 2023 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 237 Issue: 5
  • Publication Date: 2023
  • Doi Number: 10.1177/14644207221130579
  • Journal Name: Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, ABI/INFORM, Aerospace Database, Communication Abstracts, Compendex, INSPEC, Metadex, Civil Engineering Abstracts
  • Page Numbers: pp.974-980
  • Keywords: Superelasticity, high strength, shape-memory alloy, NiTiHfPd, martensite, INDUCED MARTENSITIC-TRANSFORMATION, PHASE-TRANSFORMATION, SINGLE-CRYSTALS, HYSTERESIS, MICROSTRUCTURE, PRECIPITATION, DEPENDENCE
  • Kayseri University Affiliated: No

Abstract

© IMechE 2022.Mechanical behavior of a Ni45.3Ti34.7Hf15Pd5 (at.%) alloy was systematically analyzed after homogenization treatment at 1050°C for 4 h. Shape-memory behavior under a wide range of compressive stress levels from 100 to 1000 MPa was investigated through constant-stress thermal cycling experiments. The alloys showed a reversible strain of 2.5% against a huge stress of 1 GPa. Superelastic behavior was observed in a large temperature window of 50°C–170°C. Training of the alloys resulted in hardening effect and better shape recovery in constant-temperature loading experiments at –50°C.