Post-aging cooling rate effects in Ni45.3Ti34.7Hf15Pd5 shape memory alloys

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

doi:10.1016/j.materresbull.2020.111016

Post-aging cooling rate effects in Ni_45.3Ti_34.7Hf₁₅Pd₅ shape memory alloys

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

Producción científica: Article › revisión exhaustiva

5 Citas (Scopus)

Resumen

Effects of post-aging cooling rate (water quenched, WQ, and furnace cooled, FC) on the shape memory properties of polycrystalline Ni_45.3Ti_34.7Hf₁₅Pd₅ alloys were studied. Their functional properties such as transformation temperatures, hysteresis, elastic energy, superelastic behavior and recoverable strain were found to be closely related to the post-aging cooling rate. Martensite start temperature decreased from 77 °C for WQ sample to 22 °C for FC sample. Impressive shape memory effect was observed under a huge compressive stress of 1 GPa with recoverable strains of 2.2 % and 2.5 % for the water quenched and furnace cooled samples, respectively. While both WQ and FC alloys showed perfect superelasticity for a wide temperature range, the WQ sample showed superelasticity at higher temperatures above 100 °C.

Idioma original	English
Número de artículo	111016
Publicación	Materials Research Bulletin
Volumen	133
DOI	https://doi.org/10.1016/j.materresbull.2020.111016
Estado	Published - ene 2021

Nota bibliográfica

Publisher Copyright:
© 2020 Elsevier Ltd

Financiación

This research is partially supported by the National Science Foundation under Grant Number CMMI-1538770 .

Financiadores	Número del financiador
National Science Foundation Arctic Social Science Program	CMMI-1538770

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

Acceder al documento

10.1016/j.materresbull.2020.111016

Otros archivos y enlaces

Citar esto

@article{e5d02802eb93406a89d14d1e16740492,

title = "Post-aging cooling rate effects in Ni45.3Ti34.7Hf15Pd5 shape memory alloys",

abstract = "Effects of post-aging cooling rate (water quenched, WQ, and furnace cooled, FC) on the shape memory properties of polycrystalline Ni45.3Ti34.7Hf15Pd5 alloys were studied. Their functional properties such as transformation temperatures, hysteresis, elastic energy, superelastic behavior and recoverable strain were found to be closely related to the post-aging cooling rate. Martensite start temperature decreased from 77 °C for WQ sample to 22 °C for FC sample. Impressive shape memory effect was observed under a huge compressive stress of 1 GPa with recoverable strains of 2.2 \% and 2.5 \% for the water quenched and furnace cooled samples, respectively. While both WQ and FC alloys showed perfect superelasticity for a wide temperature range, the WQ sample showed superelasticity at higher temperatures above 100 °C.",

keywords = "Microstructure, NiTiHfPd, Phase transformation, Post-aging cooling rate, Shape memory",

author = "E. Acar and S. Saedi and Toker, \{G. P.\} and H. Tobe and Karaca, \{H. E.\}",

note = "Publisher Copyright: {\textcopyright} 2020 Elsevier Ltd",

year = "2021",

month = jan,

doi = "10.1016/j.materresbull.2020.111016",

language = "English",

volume = "133",

}

TY - JOUR

T1 - Post-aging cooling rate effects in Ni45.3Ti34.7Hf15Pd5 shape memory alloys

AU - Acar, E.

AU - Saedi, S.

AU - Toker, G. P.

AU - Tobe, H.

AU - Karaca, H. E.

PY - 2021/1

Y1 - 2021/1

N2 - Effects of post-aging cooling rate (water quenched, WQ, and furnace cooled, FC) on the shape memory properties of polycrystalline Ni45.3Ti34.7Hf15Pd5 alloys were studied. Their functional properties such as transformation temperatures, hysteresis, elastic energy, superelastic behavior and recoverable strain were found to be closely related to the post-aging cooling rate. Martensite start temperature decreased from 77 °C for WQ sample to 22 °C for FC sample. Impressive shape memory effect was observed under a huge compressive stress of 1 GPa with recoverable strains of 2.2 % and 2.5 % for the water quenched and furnace cooled samples, respectively. While both WQ and FC alloys showed perfect superelasticity for a wide temperature range, the WQ sample showed superelasticity at higher temperatures above 100 °C.

AB - Effects of post-aging cooling rate (water quenched, WQ, and furnace cooled, FC) on the shape memory properties of polycrystalline Ni45.3Ti34.7Hf15Pd5 alloys were studied. Their functional properties such as transformation temperatures, hysteresis, elastic energy, superelastic behavior and recoverable strain were found to be closely related to the post-aging cooling rate. Martensite start temperature decreased from 77 °C for WQ sample to 22 °C for FC sample. Impressive shape memory effect was observed under a huge compressive stress of 1 GPa with recoverable strains of 2.2 % and 2.5 % for the water quenched and furnace cooled samples, respectively. While both WQ and FC alloys showed perfect superelasticity for a wide temperature range, the WQ sample showed superelasticity at higher temperatures above 100 °C.

KW - Microstructure

KW - NiTiHfPd

KW - Phase transformation

KW - Post-aging cooling rate

KW - Shape memory

UR - https://www.scopus.com/pages/publications/85089391103

UR - https://www.scopus.com/pages/publications/85089391103#tab=citedBy

U2 - 10.1016/j.materresbull.2020.111016

DO - 10.1016/j.materresbull.2020.111016

M3 - Article

AN - SCOPUS:85089391103

SN - 0025-5408

VL - 133

JO - Materials Research Bulletin

JF - Materials Research Bulletin

M1 - 111016

ER -