Thermo-mechanical Characterization of an Aged Ni45.3Ti39.7Hf10Pd5 Shape Memory Alloy

E. Acar; G. P. Toker; S. Saedi; H. Tobe; H. E. Karaca

doi:10.1007/s11837-020-04449-1

Thermo-mechanical Characterization of an Aged Ni_45.3Ti_39.7Hf₁₀Pd₅ Shape Memory Alloy

E. Acar, G. P. Toker, S. Saedi, H. Tobe, H. E. Karaca

Mechanical Engineering

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

2 Scopus citations

Abstract

Thermo-mechanical characterization of a Ni_45.3Ti_39.7Hf₁₀Pd₅ polycrystalline shape memory alloy after aging at 550°C for 3 h was conducted. Thermal cycling under constant stress,superelasticity and loading till failure tests were employed to reveal the shape memory and material properties. Recoverable shape memory strain of 3.8% was achieved under compressive stress of 500 MPa. The sample showed almost perfect superelasticity above 70°C with total recoverable strain of about 4%, but failed at 2340 MPa with compressive strain > 13% at 35°C, and aging was not found to significantly affect its shape memory behavior because of the low volume fraction of precipitates.

Original language	English
Pages (from-to)	640-645
Number of pages	6
Journal	JOM
Volume	73
Issue number	2
DOIs	https://doi.org/10.1007/s11837-020-04449-1
State	Published - Feb 2021

Bibliographical note

Funding Information:
This work was supported in part by NSF CMMI-15-38665, the NASA EPSCOR program, under Grant No. NNX11AQ31A and the KY EPSCoR RID program under grant no. 3049024332.

Publisher Copyright:
© 2020, The Minerals, Metals & Materials Society.

ASJC Scopus subject areas

Materials Science (all)
Engineering (all)

Access to Document

10.1007/s11837-020-04449-1

Cite this

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title = "Thermo-mechanical Characterization of an Aged Ni45.3Ti39.7Hf10Pd5 Shape Memory Alloy",

abstract = "Thermo-mechanical characterization of a Ni45.3Ti39.7Hf10Pd5 polycrystalline shape memory alloy after aging at 550°C for 3 h was conducted. Thermal cycling under constant stress,superelasticity and loading till failure tests were employed to reveal the shape memory and material properties. Recoverable shape memory strain of 3.8% was achieved under compressive stress of 500 MPa. The sample showed almost perfect superelasticity above 70°C with total recoverable strain of about 4%, but failed at 2340 MPa with compressive strain > 13% at 35°C, and aging was not found to significantly affect its shape memory behavior because of the low volume fraction of precipitates.",

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AU - Acar, E.

AU - Toker, G. P.

AU - Saedi, S.

AU - Tobe, H.

AU - Karaca, H. E.

N1 - Funding Information: This work was supported in part by NSF CMMI-15-38665, the NASA EPSCOR program, under Grant No. NNX11AQ31A and the KY EPSCoR RID program under grant no. 3049024332. Publisher Copyright: © 2020, The Minerals, Metals & Materials Society.

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