Microstructure, mechanical and shape memory properties of Ti–55Pd–5x (x=Zr, Hf, V, Nb) alloys

Arockiakumar, R.; Takahashi, Madoka; Takahashi, Satoshi; Yamabe‐Mitarai, Yoko

doi:10.1016/j.msea.2013.06.087

Cited by 21 publications

(11 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In our previous study, we focused on the addition of different alloying elements into TiPd to improve its strength, of which Zr was found to be the most promising alloying element [26][27][28] . For example, the addition of 5 at% Zr to TiPd improved the shape recovery ratio from 13% in the TiPd binary alloy to 94% after being tested at 380 C 28) .…”

Section: Introductionmentioning

confidence: 99%

Training Effect on Microstructure and Shape Recovery in Ti-Pd-Zr Alloys

et al. 2017

Self Cite

View full text Add to dashboard Cite

The training effect of microstructure and shape recovery on Ti-50Pd-xZr (x = 7 and 10) at% and Ti-50Pd-xZr-(5-x)V (x = 1, 2.5, and 4) high-temperature shape memory alloys were investigated. Zr was selected as an alloying element as it is known to improve the shape recovery of TiPd. As a further alloying element, V was selected because it is effective in strengthening TiPd. The dependence of Zr content and V addition on the martensitic transformation (MT) temperature, shape recovery, and training effect were investigated. For example, M f , decreased with increasing Zr from 480 C in Ti-50Pd to 302 C in Ti-50Pd-10Zr. In Ti-50Pd-xZr-(5-x)V, when the total amount of Zr and V was 5 at%, the MT temperatures did not change drastically. The MT temperatures ranged between 350 and 550 C. Shape recovery was investigated using the thermal cyclic test under a constant applied stress in the range of 15 to 200 MPa. Perfect recovery was obtained at low stresses, while irrecoverable strain was observed at high stresses. For Ti-50Pd-2.5Zr-2.5V and Ti-50Pd-1Zr-4V, creep deformation was observed above 150 MPa. To obtain perfect recovery, training (repeated thermal cyclic tests under a constant applied stress) was performed. Perfect recovery was obtained for the alloys by training, except for Ti-50Pd-4Zr-1V. Ti-50Pd-10Zr achieved perfect recovery up to 200 MPa, while Ti-50Pd-1Zr-4V achieved perfect recovery up to 150 MPa. Other alloys achieved perfect recovery at lower stresses of 65 or 50 MPa. The microstructure changed from a random martensite variant to a speci c orientation during training, to accommodate the large strain during deformation. It was found that a strong texture led to perfect shape recovery.

show abstract

Section: Introductionmentioning

confidence: 99%

Training Effect on Microstructure and Shape Recovery in Ti-Pd-Zr Alloys

et al. 2017

Self Cite

View full text Add to dashboard Cite

show abstract

“…In our previours studies, we found that Zr is an effective element to improve the high temperature strength and shape memroy properties of Ti-50Pt [13][14] and Ti-50Pd [15][16] alloys. Both Ti and Zr belongs to same group IV of periodic table, same crystal structure (hcp; α) at room temperature that transforms to β (bcc) phase at 1155K.…”

Section: Introductionmentioning

confidence: 71%

TiAu based shape memory alloys for high temperature applications

Wadood

Hosoda

Yamabe‐Mitarai

2014

IOP Conf. Ser.: Mater. Sci. Eng.

Self Cite

View full text Add to dashboard Cite

“…In our previous studies, Zr was found to be effective as a strengthening element in Tie50Pd [4,9] and Tie50Pt [10,11] alloys. A similar effect of Zr on the improvement of strength of B2 phase (924 MPa) resulting in improvement of shape recovery (82%) was found in Tie50Au alloy [12].…”

Section: Introductionmentioning

confidence: 89%