Mechanical and shape-memory behavior of homogenized NiTiHfPd alloys
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, Scopus)
- 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
- Erciyes University Affiliated: Yes
Abstract
Mechanical behavior of a Ni45.3Ti34.7Hf15Pd5 (at.%) alloy was systematically analyzed after homogenization treatment at 1050 degrees 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 degrees C-170 degrees C. Training of the alloys resulted in hardening effect and better shape recovery in constant-temperature loading experiments at -50 degrees C.