Thermomechanical characterization of Ni-rich NiTi fabricated by selective laser melting

Soheil Saedi; Ali Sadi Turabi; Mohsen Taheri Andani; Christoph Haberland; Mohammad Elahinia; Haluk Karaca

doi:10.1088/0964-1726/25/3/035005

Thermomechanical characterization of Ni-rich NiTi fabricated by selective laser melting

Soheil Saedi, Ali Sadi Turabi, Mohsen Taheri Andani, Christoph Haberland, Mohammad Elahinia, Haluk Karaca

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

80 Scopus citations

Abstract

This study presents the shape memory behavior of as-fabricated and solution annealed Ni_50.8Ti_49.2 alloys fabricated using the selective laser melting (SLM) technique. Results were compared to the initial ingot that was used to fabricate powders. Optical microscopy was employed to reveal the microstructure. The shape memory effect under constant compressive stress and isothermal compressive stress cycling tests were utilized to investigate the shape memory characteristics of the initial ingot and fabricated alloys. It was revealed that the SLM method and post heat treatments can be used to tailor the microstructure and shape memory response. Partial superelasticity was observed after the SLM process. Solutionizing the fabricated samples increased the strength and improved the superelasticity but slightly decreased the recoverable strain.

Original language	English
Article number	035005
Journal	Smart Materials and Structures
Volume	25
Issue number	3
DOIs	https://doi.org/10.1088/0964-1726/25/3/035005
State	Published - Feb 8 2016

Bibliographical note

Publisher Copyright:
© 2016 IOP Publishing Ltd.

Keywords

additive manufacturing
selective laser melting
shape memory alloys

ASJC Scopus subject areas

Signal Processing
Civil and Structural Engineering
Atomic and Molecular Physics, and Optics
General Materials Science
Condensed Matter Physics
Mechanics of Materials
Electrical and Electronic Engineering

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10.1088/0964-1726/25/3/035005

Cite this

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title = "Thermomechanical characterization of Ni-rich NiTi fabricated by selective laser melting",

abstract = "This study presents the shape memory behavior of as-fabricated and solution annealed Ni50.8Ti49.2 alloys fabricated using the selective laser melting (SLM) technique. Results were compared to the initial ingot that was used to fabricate powders. Optical microscopy was employed to reveal the microstructure. The shape memory effect under constant compressive stress and isothermal compressive stress cycling tests were utilized to investigate the shape memory characteristics of the initial ingot and fabricated alloys. It was revealed that the SLM method and post heat treatments can be used to tailor the microstructure and shape memory response. Partial superelasticity was observed after the SLM process. Solutionizing the fabricated samples increased the strength and improved the superelasticity but slightly decreased the recoverable strain.",

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AU - Saedi, Soheil

AU - Turabi, Ali Sadi

AU - Andani, Mohsen Taheri

AU - Haberland, Christoph

AU - Elahinia, Mohammad

AU - Karaca, Haluk

PY - 2016/2/8

Y1 - 2016/2/8

N2 - This study presents the shape memory behavior of as-fabricated and solution annealed Ni50.8Ti49.2 alloys fabricated using the selective laser melting (SLM) technique. Results were compared to the initial ingot that was used to fabricate powders. Optical microscopy was employed to reveal the microstructure. The shape memory effect under constant compressive stress and isothermal compressive stress cycling tests were utilized to investigate the shape memory characteristics of the initial ingot and fabricated alloys. It was revealed that the SLM method and post heat treatments can be used to tailor the microstructure and shape memory response. Partial superelasticity was observed after the SLM process. Solutionizing the fabricated samples increased the strength and improved the superelasticity but slightly decreased the recoverable strain.

AB - This study presents the shape memory behavior of as-fabricated and solution annealed Ni50.8Ti49.2 alloys fabricated using the selective laser melting (SLM) technique. Results were compared to the initial ingot that was used to fabricate powders. Optical microscopy was employed to reveal the microstructure. The shape memory effect under constant compressive stress and isothermal compressive stress cycling tests were utilized to investigate the shape memory characteristics of the initial ingot and fabricated alloys. It was revealed that the SLM method and post heat treatments can be used to tailor the microstructure and shape memory response. Partial superelasticity was observed after the SLM process. Solutionizing the fabricated samples increased the strength and improved the superelasticity but slightly decreased the recoverable strain.

KW - additive manufacturing

KW - selective laser melting

KW - shape memory alloys

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Thermomechanical characterization of Ni-rich NiTi fabricated by selective laser melting

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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