Power-law creep in near-equiatomic nickel-titanium alloys

Scott M. Oppenheimer; Andrea R. Yung; David C. Dunand

doi:10.1016/j.scriptamat.2007.05.004

Power-law creep in near-equiatomic nickel-titanium alloys

Scott M. Oppenheimer, Andrea R. Yung, David C. Dunand^*

^*Corresponding author for this work

Materials Science and Engineering

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

33 Scopus citations

Abstract

The compressive creep behavior of nickel-rich B2-NiTi (with 50-140 μm grain size) was studied over the stress range 3-11 MPa and the temperature range 950-1100 °C. The stress exponent (n = 2.7) and activation energy (Q = 155 kJ mol^-1) are compared with a literature review of NiTi creep studies performed over lower temperature and/or higher stresses. Possible explanations for discrepancies between studies are discussed.

Original language	English (US)
Pages (from-to)	377-380
Number of pages	4
Journal	Scripta Materialia
Volume	57
Issue number	5
DOIs	https://doi.org/10.1016/j.scriptamat.2007.05.004
State	Published - Sep 2007

Funding

This study was supported by the National Science Foundation through Grant DMR-0505772. The authors express their gratitude to Dr. Alan R. Pelton from Nitinol Devices and Components (Fremont CA) for supplying the NiTi rods used in this study.

Keywords

Creep
NiTi
Shape-memory alloys (SMA)

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.2007.05.004

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title = "Power-law creep in near-equiatomic nickel-titanium alloys",

abstract = "The compressive creep behavior of nickel-rich B2-NiTi (with 50-140 μm grain size) was studied over the stress range 3-11 MPa and the temperature range 950-1100 °C. The stress exponent (n = 2.7) and activation energy (Q = 155 kJ mol-1) are compared with a literature review of NiTi creep studies performed over lower temperature and/or higher stresses. Possible explanations for discrepancies between studies are discussed.",

keywords = "Creep, NiTi, Shape-memory alloys (SMA)",

author = "Oppenheimer, {Scott M.} and Yung, {Andrea R.} and Dunand, {David C.}",

note = "Funding Information: This study was supported by the National Science Foundation through Grant DMR-0505772. The authors express their gratitude to Dr. Alan R. Pelton from Nitinol Devices and Components (Fremont CA) for supplying the NiTi rods used in this study. ",

year = "2007",

month = sep,

doi = "10.1016/j.scriptamat.2007.05.004",

language = "English (US)",

volume = "57",

pages = "377--380",

journal = "Scripta Materialia",

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T1 - Power-law creep in near-equiatomic nickel-titanium alloys

AU - Oppenheimer, Scott M.

AU - Yung, Andrea R.

AU - Dunand, David C.

N1 - Funding Information: This study was supported by the National Science Foundation through Grant DMR-0505772. The authors express their gratitude to Dr. Alan R. Pelton from Nitinol Devices and Components (Fremont CA) for supplying the NiTi rods used in this study.

PY - 2007/9

Y1 - 2007/9

N2 - The compressive creep behavior of nickel-rich B2-NiTi (with 50-140 μm grain size) was studied over the stress range 3-11 MPa and the temperature range 950-1100 °C. The stress exponent (n = 2.7) and activation energy (Q = 155 kJ mol-1) are compared with a literature review of NiTi creep studies performed over lower temperature and/or higher stresses. Possible explanations for discrepancies between studies are discussed.

AB - The compressive creep behavior of nickel-rich B2-NiTi (with 50-140 μm grain size) was studied over the stress range 3-11 MPa and the temperature range 950-1100 °C. The stress exponent (n = 2.7) and activation energy (Q = 155 kJ mol-1) are compared with a literature review of NiTi creep studies performed over lower temperature and/or higher stresses. Possible explanations for discrepancies between studies are discussed.

KW - Creep

KW - NiTi

KW - Shape-memory alloys (SMA)

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JO - Scripta Materialia

JF - Scripta Materialia

IS - 5

ER -

Power-law creep in near-equiatomic nickel-titanium alloys

Abstract

Funding

Keywords

ASJC Scopus subject areas

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