Abstract
To understand the potential of high-temperature shape memory alloys, we have investigated the phase transformation and shape memory effect of Ti–(50 − x)Pt–xPd–5Zr alloys (x = 0, 5, and 15 at.%), which present the B2 structure in the austenite phase and B19 structure in the martensite phase. Their phase transformation temperatures are very high; Af and Mf of Ti–50Pt are 1066 and 1012 °C, respectively. By adding Zr and Pd, the phase transition temperatures decrease, ranging between 804 and 994 °C for Af and 590 and 865 °C for Mf. Even at the high phase transformation temperature, a maximum recovery ratio of 70% was obtained for one cycle in a thermal cyclic test. A work output of 1.2 J/cm3 was also obtained. The recovery ratio obtained by the thermal cyclic test was less than 70% because the recovery strain was < 1% and a large irrecoverable strain was obtained. The shape recovery was explained by the austenite strength. The training effect was also investigated.
| Original language | English |
|---|---|
| Pages (from-to) | 381-391 |
| Number of pages | 11 |
| Journal | Shape Memory and Superelasticity |
| Volume | 3 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - 2017 Dec 1 |
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Keywords
- Martensitic transformation
- Shape memory alloys
- Strain–temperature test
- Titanium platinum
- Work output
ASJC Scopus subject areas
- Materials Science(all)
- Mechanics of Materials
Cite this
Phase Transformation and Shape Memory Effect of Ti–Pd–Pt–Zr High-Temperature Shape Memory Alloys. / Yamabe-Mitarai, Yoko; Takebe, Wataru; Shimojo, Masayuki.
In: Shape Memory and Superelasticity, Vol. 3, No. 4, 01.12.2017, p. 381-391.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Phase Transformation and Shape Memory Effect of Ti–Pd–Pt–Zr High-Temperature Shape Memory Alloys
AU - Yamabe-Mitarai, Yoko
AU - Takebe, Wataru
AU - Shimojo, Masayuki
PY - 2017/12/1
Y1 - 2017/12/1
N2 - To understand the potential of high-temperature shape memory alloys, we have investigated the phase transformation and shape memory effect of Ti–(50 − x)Pt–xPd–5Zr alloys (x = 0, 5, and 15 at.%), which present the B2 structure in the austenite phase and B19 structure in the martensite phase. Their phase transformation temperatures are very high; Af and Mf of Ti–50Pt are 1066 and 1012 °C, respectively. By adding Zr and Pd, the phase transition temperatures decrease, ranging between 804 and 994 °C for Af and 590 and 865 °C for Mf. Even at the high phase transformation temperature, a maximum recovery ratio of 70% was obtained for one cycle in a thermal cyclic test. A work output of 1.2 J/cm3 was also obtained. The recovery ratio obtained by the thermal cyclic test was less than 70% because the recovery strain was < 1% and a large irrecoverable strain was obtained. The shape recovery was explained by the austenite strength. The training effect was also investigated.
AB - To understand the potential of high-temperature shape memory alloys, we have investigated the phase transformation and shape memory effect of Ti–(50 − x)Pt–xPd–5Zr alloys (x = 0, 5, and 15 at.%), which present the B2 structure in the austenite phase and B19 structure in the martensite phase. Their phase transformation temperatures are very high; Af and Mf of Ti–50Pt are 1066 and 1012 °C, respectively. By adding Zr and Pd, the phase transition temperatures decrease, ranging between 804 and 994 °C for Af and 590 and 865 °C for Mf. Even at the high phase transformation temperature, a maximum recovery ratio of 70% was obtained for one cycle in a thermal cyclic test. A work output of 1.2 J/cm3 was also obtained. The recovery ratio obtained by the thermal cyclic test was less than 70% because the recovery strain was < 1% and a large irrecoverable strain was obtained. The shape recovery was explained by the austenite strength. The training effect was also investigated.
KW - Martensitic transformation
KW - Shape memory alloys
KW - Strain–temperature test
KW - Titanium platinum
KW - Work output
UR - http://www.scopus.com/inward/record.url?scp=85069934076&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85069934076&partnerID=8YFLogxK
U2 - 10.1007/s40830-017-0131-2
DO - 10.1007/s40830-017-0131-2
M3 - Article
VL - 3
SP - 381
EP - 391
JO - Shape Memory and Superelasticity
JF - Shape Memory and Superelasticity
SN - 2199-384X
IS - 4
ER -