Cast-replicated NiTiCu foams with superelastic properties

Marcus L. Young; John D. Defouw; Jan Frenzel; David C. Dunand

doi:10.1007/s11661-011-1060-x

Cast-replicated NiTiCu foams with superelastic properties

Marcus L. Young^*, John D. Defouw, Jan Frenzel, David C. Dunand

^*Corresponding author for this work

Materials Science and Engineering

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

10 Scopus citations

Abstract

Ni40Ti50Cu10 foams were replication cast into a porous SrF2 preform. This space holder is chemically stable in contact with liquid and solid Ni40Ti50Cu10, but can be removed by dissolution in nitric acid. A Ni40Ti50Cu10 foam with 60 pct porosity exhibits low stiffness (1 to 13 GPa) and large recoverable strains (~4 pct) during cyclical compression testing at 311 K (38C), within the superelastic range based on calorimetry results. This is the first time that replication casting is used to create an open foam of a NiTi-based shape-memory alloy, due to difficulties associated with the high reactivity and strong contamination tendency of the melt. Casting NiTi-based shape-memory alloy foams enable the economical production of porous actuators, energy absorbers, and biomedical implants with complex shapes.

Original language	English (US)
Pages (from-to)	2939-2944
Number of pages	6
Journal	Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
Volume	43
Issue number	8
DOIs	https://doi.org/10.1007/s11661-011-1060-x
State	Published - Aug 2012

ASJC Scopus subject areas

Condensed Matter Physics
Mechanics of Materials
Metals and Alloys

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@article{dede80710cce4f27ad517f943b25bcda,

title = "Cast-replicated NiTiCu foams with superelastic properties",

abstract = "Ni40Ti50Cu10 foams were replication cast into a porous SrF2 preform. This space holder is chemically stable in contact with liquid and solid Ni40Ti50Cu10, but can be removed by dissolution in nitric acid. A Ni40Ti50Cu10 foam with 60 pct porosity exhibits low stiffness (1 to 13 GPa) and large recoverable strains (~4 pct) during cyclical compression testing at 311 K (38C), within the superelastic range based on calorimetry results. This is the first time that replication casting is used to create an open foam of a NiTi-based shape-memory alloy, due to difficulties associated with the high reactivity and strong contamination tendency of the melt. Casting NiTi-based shape-memory alloy foams enable the economical production of porous actuators, energy absorbers, and biomedical implants with complex shapes.",

author = "Young, {Marcus L.} and Defouw, {John D.} and Jan Frenzel and Dunand, {David C.}",

note = "Funding Information: The authors acknowledge funding by the Deutsche Forschungsgemeinschaft (DFG) through Subproject C7 of the Collaborative Research Center SFB 459 (with additional funding from the German state of North Rhine-Westphalia and Ruhr-Universit{\"a}t Bochum). MLY also acknowledges support by the Alexander von Humboldt Foundation.",

year = "2012",

month = aug,

doi = "10.1007/s11661-011-1060-x",

language = "English (US)",

volume = "43",

pages = "2939--2944",

journal = "Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science",

issn = "1073-5623",

publisher = "Springer Boston",

number = "8",

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AU - Young, Marcus L.

AU - Defouw, John D.

AU - Frenzel, Jan

AU - Dunand, David C.

N1 - Funding Information: The authors acknowledge funding by the Deutsche Forschungsgemeinschaft (DFG) through Subproject C7 of the Collaborative Research Center SFB 459 (with additional funding from the German state of North Rhine-Westphalia and Ruhr-Universität Bochum). MLY also acknowledges support by the Alexander von Humboldt Foundation.

PY - 2012/8

Y1 - 2012/8

N2 - Ni40Ti50Cu10 foams were replication cast into a porous SrF2 preform. This space holder is chemically stable in contact with liquid and solid Ni40Ti50Cu10, but can be removed by dissolution in nitric acid. A Ni40Ti50Cu10 foam with 60 pct porosity exhibits low stiffness (1 to 13 GPa) and large recoverable strains (~4 pct) during cyclical compression testing at 311 K (38C), within the superelastic range based on calorimetry results. This is the first time that replication casting is used to create an open foam of a NiTi-based shape-memory alloy, due to difficulties associated with the high reactivity and strong contamination tendency of the melt. Casting NiTi-based shape-memory alloy foams enable the economical production of porous actuators, energy absorbers, and biomedical implants with complex shapes.

AB - Ni40Ti50Cu10 foams were replication cast into a porous SrF2 preform. This space holder is chemically stable in contact with liquid and solid Ni40Ti50Cu10, but can be removed by dissolution in nitric acid. A Ni40Ti50Cu10 foam with 60 pct porosity exhibits low stiffness (1 to 13 GPa) and large recoverable strains (~4 pct) during cyclical compression testing at 311 K (38C), within the superelastic range based on calorimetry results. This is the first time that replication casting is used to create an open foam of a NiTi-based shape-memory alloy, due to difficulties associated with the high reactivity and strong contamination tendency of the melt. Casting NiTi-based shape-memory alloy foams enable the economical production of porous actuators, energy absorbers, and biomedical implants with complex shapes.

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JO - Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science

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