Characteristics of Ti50Pd30Ni20 high-temperature shape memory alloy

D. Golberg; Ya Xu; Y. Murakami; S. Morito; K. Otsuka; T. Ueki; H. Horikawa

doi:10.1016/0966-9795(94)P3684-G

Characteristics of Ti₅₀Pd₃₀Ni₂₀ high-temperature shape memory alloy

D. Golberg, Ya Xu, Y. Murakami, S. Morito, K. Otsuka, T. Ueki, H. Horikawa

Institute of Multidisciplinary Research for Advanced Materials (IMRAM)

Research output: Contribution to journal › Article › peer-review

75 Citations (Scopus)

Abstract

The decrease in critical stress for slip with increasing temperature leads to the introduction of permanent strain and thus deteriorates shape memory (SM) characteristics of high-temperature SM alloys. Thermomechanical treatment consisting of cold-rolling and subsequent annealing at various temperatures, was applied for the first time to improve the high-temperature SM characteristics of the Ti₅₀Pd₃₀Ni₂₀ alloy. Then, a systematic study of transformation temperatures, microstructure and associated mechanical behaviour at 443-548K was carried out. The remarkable improvement in SM characteristics was found for the alloy cold-rolled to 24-25% reduction in thickness and annealed at 673K for 3.6 ks. In addition, superelasticity was observed for the first time in this alloy. Finally, the key factor for improvement of high-temperature SM characteristics in the alloy is pointed out.

Original language	English
Pages (from-to)	35-46
Number of pages	12
Journal	Intermetallics
Volume	3
Issue number	1
DOIs	https://doi.org/10.1016/0966-9795(94)P3684-G
Publication status	Published - 1995

Keywords

high-temperature shape memory alloys
martensitic transformation
shape memory effect
superelasticity
transformation temperatures

ASJC Scopus subject areas

Chemistry(all)
Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

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10.1016/0966-9795(94)P3684-G

Cite this

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title = "Characteristics of Ti50Pd30Ni20 high-temperature shape memory alloy",

abstract = "The decrease in critical stress for slip with increasing temperature leads to the introduction of permanent strain and thus deteriorates shape memory (SM) characteristics of high-temperature SM alloys. Thermomechanical treatment consisting of cold-rolling and subsequent annealing at various temperatures, was applied for the first time to improve the high-temperature SM characteristics of the Ti50Pd30Ni20 alloy. Then, a systematic study of transformation temperatures, microstructure and associated mechanical behaviour at 443-548K was carried out. The remarkable improvement in SM characteristics was found for the alloy cold-rolled to 24-25% reduction in thickness and annealed at 673K for 3.6 ks. In addition, superelasticity was observed for the first time in this alloy. Finally, the key factor for improvement of high-temperature SM characteristics in the alloy is pointed out.",

keywords = "high-temperature shape memory alloys, martensitic transformation, shape memory effect, superelasticity, transformation temperatures",

author = "D. Golberg and Ya Xu and Y. Murakami and S. Morito and K. Otsuka and T. Ueki and H. Horikawa",

note = "Funding Information: The authors are grateful to Drs V. Martynov and Min Piao for useful discussions.T he presentw ork was partially supported by the Grant-in Aid for Scientific Research on Priority Areas (1992-93) and Grant-in-Aid for the Fellows of Japan Society for Promotion of Science( 1993).",

year = "1995",

doi = "10.1016/0966-9795(94)P3684-G",

language = "English",

volume = "3",

pages = "35--46",

journal = "Intermetallics",

issn = "0966-9795",

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T1 - Characteristics of Ti50Pd30Ni20 high-temperature shape memory alloy

AU - Golberg, D.

AU - Xu, Ya

AU - Murakami, Y.

AU - Morito, S.

AU - Otsuka, K.

AU - Ueki, T.

AU - Horikawa, H.

N1 - Funding Information: The authors are grateful to Drs V. Martynov and Min Piao for useful discussions.T he presentw ork was partially supported by the Grant-in Aid for Scientific Research on Priority Areas (1992-93) and Grant-in-Aid for the Fellows of Japan Society for Promotion of Science( 1993).

PY - 1995

Y1 - 1995

N2 - The decrease in critical stress for slip with increasing temperature leads to the introduction of permanent strain and thus deteriorates shape memory (SM) characteristics of high-temperature SM alloys. Thermomechanical treatment consisting of cold-rolling and subsequent annealing at various temperatures, was applied for the first time to improve the high-temperature SM characteristics of the Ti50Pd30Ni20 alloy. Then, a systematic study of transformation temperatures, microstructure and associated mechanical behaviour at 443-548K was carried out. The remarkable improvement in SM characteristics was found for the alloy cold-rolled to 24-25% reduction in thickness and annealed at 673K for 3.6 ks. In addition, superelasticity was observed for the first time in this alloy. Finally, the key factor for improvement of high-temperature SM characteristics in the alloy is pointed out.

AB - The decrease in critical stress for slip with increasing temperature leads to the introduction of permanent strain and thus deteriorates shape memory (SM) characteristics of high-temperature SM alloys. Thermomechanical treatment consisting of cold-rolling and subsequent annealing at various temperatures, was applied for the first time to improve the high-temperature SM characteristics of the Ti50Pd30Ni20 alloy. Then, a systematic study of transformation temperatures, microstructure and associated mechanical behaviour at 443-548K was carried out. The remarkable improvement in SM characteristics was found for the alloy cold-rolled to 24-25% reduction in thickness and annealed at 673K for 3.6 ks. In addition, superelasticity was observed for the first time in this alloy. Finally, the key factor for improvement of high-temperature SM characteristics in the alloy is pointed out.

KW - high-temperature shape memory alloys

KW - martensitic transformation

KW - shape memory effect

KW - superelasticity

KW - transformation temperatures

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