Shape memory behavior of NiTiHf alloys fabricated by selective laser melting

Guher P. Toker; Mohammadreza Nematollahi; Sayed E. Saghaian; Keyvan S. Baghbaderani; Othmane Benafan; Mohammad Elahinia; Haluk E. Karaca

doi:10.1016/j.scriptamat.2019.11.056

Shape memory behavior of NiTiHf alloys fabricated by selective laser melting

Guher P. Toker, Mohammadreza Nematollahi, Sayed E. Saghaian, Keyvan S. Baghbaderani, Othmane Benafan, Mohammad Elahinia, Haluk E. Karaca

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

42 Scopus citations

Abstract

This study investigates the high-temperature shape memory behavior of NiTiHf alloys fabricated via selective laser melting process. Specifically, the effects of laser power (100 W and 250 W) on their transformation temperatures, strain, and microstructure were investigated and compared to the ingot. The transformation temperatures of SLM fabricated alloys increased from 150 °C to 350 °C with elevated laser power due to Ni evaporation. The sample fabricated with 100 W showed sharp transformation peaks, good shape memory behavior with recoverable strain of 1.67% and superelasticity. The sample fabricated with 250 W had broad transformation peaks with low recoverable strain of 0.7% during thermal cycling.

Original language	English
Pages (from-to)	361-365
Number of pages	5
Journal	Scripta Materialia
Volume	178
DOIs	https://doi.org/10.1016/j.scriptamat.2019.11.056
State	Published - Mar 15 2020

Bibliographical note

Publisher Copyright:
© 2019

Keywords

Additive manufacturing
High-temperature shape memory alloys
NiTiHf
Selective laser melting

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering
Metals and Alloys

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10.1016/j.scriptamat.2019.11.056

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title = "Shape memory behavior of NiTiHf alloys fabricated by selective laser melting",

abstract = "This study investigates the high-temperature shape memory behavior of NiTiHf alloys fabricated via selective laser melting process. Specifically, the effects of laser power (100 W and 250 W) on their transformation temperatures, strain, and microstructure were investigated and compared to the ingot. The transformation temperatures of SLM fabricated alloys increased from 150 °C to 350 °C with elevated laser power due to Ni evaporation. The sample fabricated with 100 W showed sharp transformation peaks, good shape memory behavior with recoverable strain of 1.67% and superelasticity. The sample fabricated with 250 W had broad transformation peaks with low recoverable strain of 0.7% during thermal cycling.",

keywords = "Additive manufacturing, High-temperature shape memory alloys, NiTiHf, Selective laser melting",

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doi = "10.1016/j.scriptamat.2019.11.056",

language = "English",

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T1 - Shape memory behavior of NiTiHf alloys fabricated by selective laser melting

AU - Toker, Guher P.

AU - Nematollahi, Mohammadreza

AU - Saghaian, Sayed E.

AU - Baghbaderani, Keyvan S.

AU - Benafan, Othmane

AU - Elahinia, Mohammad

AU - Karaca, Haluk E.

PY - 2020/3/15

Y1 - 2020/3/15

N2 - This study investigates the high-temperature shape memory behavior of NiTiHf alloys fabricated via selective laser melting process. Specifically, the effects of laser power (100 W and 250 W) on their transformation temperatures, strain, and microstructure were investigated and compared to the ingot. The transformation temperatures of SLM fabricated alloys increased from 150 °C to 350 °C with elevated laser power due to Ni evaporation. The sample fabricated with 100 W showed sharp transformation peaks, good shape memory behavior with recoverable strain of 1.67% and superelasticity. The sample fabricated with 250 W had broad transformation peaks with low recoverable strain of 0.7% during thermal cycling.

AB - This study investigates the high-temperature shape memory behavior of NiTiHf alloys fabricated via selective laser melting process. Specifically, the effects of laser power (100 W and 250 W) on their transformation temperatures, strain, and microstructure were investigated and compared to the ingot. The transformation temperatures of SLM fabricated alloys increased from 150 °C to 350 °C with elevated laser power due to Ni evaporation. The sample fabricated with 100 W showed sharp transformation peaks, good shape memory behavior with recoverable strain of 1.67% and superelasticity. The sample fabricated with 250 W had broad transformation peaks with low recoverable strain of 0.7% during thermal cycling.

KW - Additive manufacturing

KW - High-temperature shape memory alloys

KW - NiTiHf

KW - Selective laser melting

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DO - 10.1016/j.scriptamat.2019.11.056

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SN - 1359-6462

VL - 178

SP - 361

EP - 365

JO - Scripta Materialia

JF - Scripta Materialia

ER -

Shape memory behavior of NiTiHf alloys fabricated by selective laser melting

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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