Additive manufacturing of NiTiHf high temperature shape memory alloy

Mohammad Elahinia; Narges Shayesteh Moghaddam; Amirhesam Amerinatanzi; Soheil Saedi; Guher Pelin Toker; Haluk Karaca; Glen S. Bigelow; Othmane Benafan

doi:10.1016/j.scriptamat.2017.10.016

Additive manufacturing of NiTiHf high temperature shape memory alloy

Mohammad Elahinia, Narges Shayesteh Moghaddam, Amirhesam Amerinatanzi, Soheil Saedi, Guher Pelin Toker, Haluk Karaca, Glen S. Bigelow, Othmane Benafan

Mechanical Engineering

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

83 Scopus citations

Abstract

A NiTi-20Hf high temperature shape memory alloy (HTSMA) was additively manufactured by selective laser melting (SLM) technique using NiTiHf powder. The thermomechanical and shape memory response were compared to the conventional vacuum induction skull melted counterpart. Transformation temperatures of the SLM material were found to be above 200 °C and slightly lower due to the additional oxygen pick up from the gas atomization and melting process. The shape memory response in compression was measured for stresses up to 500 MPa, and transformation strains were found to be very comparable (up to 1.26% for as-extruded; up to 1.52% for SLM).

Original language	English
Pages (from-to)	90-94
Number of pages	5
Journal	Scripta Materialia
Volume	145
DOIs	https://doi.org/10.1016/j.scriptamat.2017.10.016
State	Published - Mar 1 2018

Bibliographical note

Funding Information:
Funding support from the NASA Glenn Research Center, Transformational Tools & Technologies (TTT) Project is gratefully acknowledged (contract #NNC16VA75P ).

Publisher Copyright:
© 2017 Acta Materialia Inc.

Keywords

Actuators
Additive manufacturing
High temperature shape memory alloys
NiTiHf

ASJC Scopus subject areas

Materials Science (all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering
Metals and Alloys

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10.1016/j.scriptamat.2017.10.016

Cite this

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title = "Additive manufacturing of NiTiHf high temperature shape memory alloy",

abstract = "A NiTi-20Hf high temperature shape memory alloy (HTSMA) was additively manufactured by selective laser melting (SLM) technique using NiTiHf powder. The thermomechanical and shape memory response were compared to the conventional vacuum induction skull melted counterpart. Transformation temperatures of the SLM material were found to be above 200 °C and slightly lower due to the additional oxygen pick up from the gas atomization and melting process. The shape memory response in compression was measured for stresses up to 500 MPa, and transformation strains were found to be very comparable (up to 1.26% for as-extruded; up to 1.52% for SLM).",

keywords = "Actuators, Additive manufacturing, High temperature shape memory alloys, NiTiHf",

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note = "Funding Information: Funding support from the NASA Glenn Research Center, Transformational Tools & Technologies (TTT) Project is gratefully acknowledged (contract #NNC16VA75P ). Publisher Copyright: {\textcopyright} 2017 Acta Materialia Inc.",

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AU - Elahinia, Mohammad

AU - Shayesteh Moghaddam, Narges

AU - Amerinatanzi, Amirhesam

AU - Saedi, Soheil

AU - Toker, Guher Pelin

AU - Karaca, Haluk

AU - Bigelow, Glen S.

AU - Benafan, Othmane

N1 - Funding Information: Funding support from the NASA Glenn Research Center, Transformational Tools & Technologies (TTT) Project is gratefully acknowledged (contract #NNC16VA75P ). Publisher Copyright: © 2017 Acta Materialia Inc.

PY - 2018/3/1

Y1 - 2018/3/1

N2 - A NiTi-20Hf high temperature shape memory alloy (HTSMA) was additively manufactured by selective laser melting (SLM) technique using NiTiHf powder. The thermomechanical and shape memory response were compared to the conventional vacuum induction skull melted counterpart. Transformation temperatures of the SLM material were found to be above 200 °C and slightly lower due to the additional oxygen pick up from the gas atomization and melting process. The shape memory response in compression was measured for stresses up to 500 MPa, and transformation strains were found to be very comparable (up to 1.26% for as-extruded; up to 1.52% for SLM).

AB - A NiTi-20Hf high temperature shape memory alloy (HTSMA) was additively manufactured by selective laser melting (SLM) technique using NiTiHf powder. The thermomechanical and shape memory response were compared to the conventional vacuum induction skull melted counterpart. Transformation temperatures of the SLM material were found to be above 200 °C and slightly lower due to the additional oxygen pick up from the gas atomization and melting process. The shape memory response in compression was measured for stresses up to 500 MPa, and transformation strains were found to be very comparable (up to 1.26% for as-extruded; up to 1.52% for SLM).

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KW - Additive manufacturing

KW - High temperature shape memory alloys

KW - NiTiHf

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Additive manufacturing of NiTiHf high temperature shape memory alloy

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

Access to Document

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