Shape memory behavior of high strength NiTiHfPd polycrystalline alloys

H. E. Karaca; E. Acar; G. S. Ded; B. Basaran; H. Tobe; R. D. Noebe; G. Bigelow; Y. I. Chumlyakov

doi:10.1016/j.actamat.2013.04.039

Shape memory behavior of high strength NiTiHfPd polycrystalline alloys

H. E. Karaca, E. Acar, G. S. Ded, B. Basaran, H. Tobe, R. D. Noebe, G. Bigelow, Y. I. Chumlyakov

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Abstract

Systematic characterization of the shape memory properties of a quaternary Ni_45.3-Ti_29.7-Hf₂₀-Pd₅ (at.%) polycrystalline alloy was performed in compression after selected aging treatments. Precipitation characteristics were revealed by transmission electron microscopy. The effects of aging temperature and time on transformation temperatures, recoverable and residual strains, and temperature and stress hystereses were determined by differential scanning calorimetry, constant-load thermal cycling experiments and isothermal strain cycling (superelasticity) tests. The crystal structure and lattice parameters of the transforming phases were determined from X-ray diffraction analysis. It was revealed that precipitation hardening significantly improved the shape memory properties of the NiTiHfPd alloy. Under optimum aging conditions, shape memory strains of up to 4% under 1 GPa were possible, and superelasticity experiments resulted in full strain recovery without any plastic deformation, even at stress levels as high as 2 GPa. The NiTiHfPd polycrystalline alloy exhibited very high damping capacity/absorbed energy (30-34 J cm^-3) and work output (30-35 J cm^-3), which were attributed to the ability to operate at high stress levels without significant plastic deformation and to a high mechanical hysteresis (>900 MPa) at temperatures ranging from 20 C to 80 C.

Original language	English
Pages (from-to)	5036-5049
Number of pages	14
Journal	Acta Materialia
Volume	61
Issue number	13
DOIs	https://doi.org/10.1016/j.actamat.2013.04.039
State	Published - Aug 2013

Bibliographical note

Funding Information:
This work was supported in part by the NASA Fundamental Aeronautics Program, Aeronautical Sciences Project and the NASA EPSCOR program under Grant No: NNX11AQ31A, KY EPSCoR RID program under Grant No. 3049024332 and RFBR project with Grant No. 10-03-0154-a.

Funding

This work was supported in part by the NASA Fundamental Aeronautics Program, Aeronautical Sciences Project and the NASA EPSCOR program under Grant No: NNX11AQ31A, KY EPSCoR RID program under Grant No. 3049024332 and RFBR project with Grant No. 10-03-0154-a.

Funders	Funder number
National Aeronautics and Space Administration	NNX11AQ31A, 3049024332
Russian Foundation for Basic Research	10-03-0154-a

Keywords

High strength alloys
Mechanical characterization
Phase transformation
Precipitation
Shape memory alloys

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Polymers and Plastics
Metals and Alloys

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10.1016/j.actamat.2013.04.039

Cite this

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title = "Shape memory behavior of high strength NiTiHfPd polycrystalline alloys",

abstract = "Systematic characterization of the shape memory properties of a quaternary Ni45.3-Ti29.7-Hf20-Pd5 (at.%) polycrystalline alloy was performed in compression after selected aging treatments. Precipitation characteristics were revealed by transmission electron microscopy. The effects of aging temperature and time on transformation temperatures, recoverable and residual strains, and temperature and stress hystereses were determined by differential scanning calorimetry, constant-load thermal cycling experiments and isothermal strain cycling (superelasticity) tests. The crystal structure and lattice parameters of the transforming phases were determined from X-ray diffraction analysis. It was revealed that precipitation hardening significantly improved the shape memory properties of the NiTiHfPd alloy. Under optimum aging conditions, shape memory strains of up to 4% under 1 GPa were possible, and superelasticity experiments resulted in full strain recovery without any plastic deformation, even at stress levels as high as 2 GPa. The NiTiHfPd polycrystalline alloy exhibited very high damping capacity/absorbed energy (30-34 J cm-3) and work output (30-35 J cm-3), which were attributed to the ability to operate at high stress levels without significant plastic deformation and to a high mechanical hysteresis (>900 MPa) at temperatures ranging from 20 C to 80 C.",

keywords = "High strength alloys, Mechanical characterization, Phase transformation, Precipitation, Shape memory alloys",

author = "Karaca, {H. E.} and E. Acar and Ded, {G. S.} and B. Basaran and H. Tobe and Noebe, {R. D.} and G. Bigelow and Chumlyakov, {Y. I.}",

note = "Funding Information: This work was supported in part by the NASA Fundamental Aeronautics Program, Aeronautical Sciences Project and the NASA EPSCOR program under Grant No: NNX11AQ31A, KY EPSCoR RID program under Grant No. 3049024332 and RFBR project with Grant No. 10-03-0154-a. ",

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language = "English",

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AU - Karaca, H. E.

AU - Acar, E.

AU - Ded, G. S.

AU - Basaran, B.

AU - Tobe, H.

AU - Noebe, R. D.

AU - Bigelow, G.

AU - Chumlyakov, Y. I.

N1 - Funding Information: This work was supported in part by the NASA Fundamental Aeronautics Program, Aeronautical Sciences Project and the NASA EPSCOR program under Grant No: NNX11AQ31A, KY EPSCoR RID program under Grant No. 3049024332 and RFBR project with Grant No. 10-03-0154-a.

PY - 2013/8

Y1 - 2013/8

N2 - Systematic characterization of the shape memory properties of a quaternary Ni45.3-Ti29.7-Hf20-Pd5 (at.%) polycrystalline alloy was performed in compression after selected aging treatments. Precipitation characteristics were revealed by transmission electron microscopy. The effects of aging temperature and time on transformation temperatures, recoverable and residual strains, and temperature and stress hystereses were determined by differential scanning calorimetry, constant-load thermal cycling experiments and isothermal strain cycling (superelasticity) tests. The crystal structure and lattice parameters of the transforming phases were determined from X-ray diffraction analysis. It was revealed that precipitation hardening significantly improved the shape memory properties of the NiTiHfPd alloy. Under optimum aging conditions, shape memory strains of up to 4% under 1 GPa were possible, and superelasticity experiments resulted in full strain recovery without any plastic deformation, even at stress levels as high as 2 GPa. The NiTiHfPd polycrystalline alloy exhibited very high damping capacity/absorbed energy (30-34 J cm-3) and work output (30-35 J cm-3), which were attributed to the ability to operate at high stress levels without significant plastic deformation and to a high mechanical hysteresis (>900 MPa) at temperatures ranging from 20 C to 80 C.

AB - Systematic characterization of the shape memory properties of a quaternary Ni45.3-Ti29.7-Hf20-Pd5 (at.%) polycrystalline alloy was performed in compression after selected aging treatments. Precipitation characteristics were revealed by transmission electron microscopy. The effects of aging temperature and time on transformation temperatures, recoverable and residual strains, and temperature and stress hystereses were determined by differential scanning calorimetry, constant-load thermal cycling experiments and isothermal strain cycling (superelasticity) tests. The crystal structure and lattice parameters of the transforming phases were determined from X-ray diffraction analysis. It was revealed that precipitation hardening significantly improved the shape memory properties of the NiTiHfPd alloy. Under optimum aging conditions, shape memory strains of up to 4% under 1 GPa were possible, and superelasticity experiments resulted in full strain recovery without any plastic deformation, even at stress levels as high as 2 GPa. The NiTiHfPd polycrystalline alloy exhibited very high damping capacity/absorbed energy (30-34 J cm-3) and work output (30-35 J cm-3), which were attributed to the ability to operate at high stress levels without significant plastic deformation and to a high mechanical hysteresis (>900 MPa) at temperatures ranging from 20 C to 80 C.

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KW - Mechanical characterization

KW - Phase transformation

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Shape memory behavior of high strength NiTiHfPd polycrystalline alloys

Abstract

Bibliographical note

Funding

Keywords

ASJC Scopus subject areas

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