IMPROVEMENT OF SHAPE-MEMORY CHARACTERISTICS BY PRECIPITATION-HARDENING OF TI-PD-NI ALLOYS

Authors
SHIMIZU S XU Y OKUNISHI E TANAKA S OTSUKA K MITOSE K
Citation
S. Shimizu et al., IMPROVEMENT OF SHAPE-MEMORY CHARACTERISTICS BY PRECIPITATION-HARDENING OF TI-PD-NI ALLOYS, Materials letters, 34(1-2), 1998, pp. 23-29
Citations number
17
Categorie Soggetti
Material Science","Physics, Applied
Journal title
Materials letters → ACNP
ISSN journal
0167577X
Volume
34
Issue
1-2
Year of publication
1998
Pages
23 - 29
Database
ISI
SICI code
0167-577X(1998)34:1-2<23:IOSCBP>2.0.ZU;2-U
Abstract
An attempt to improve the shape memory characteristics by precipitatio n-hardening was made for non-equiatomic Ti-Pd-Ni high temperature shap e memory alloys (Ti:(Ni, Pd) not equal 50:50) by differential scanning calorimetry, high temperature tensile tests and transmission electron microscopy. It was found that homogeneously distributed fine precipit ates can be produced by ageing treatment at the proper temperature of 773 K for Ti50.6Pd30Ni19.4 alloys, These precipitates increase the cri tical stress for slip and improve the shape memory characteristics sub stantially at high temperatures. (C) 1998 Elsevier Science B.V.