Hysteresis in NiTi alloys

H. Sehitoglu, R. Hamilton, H. J. Maier, Y. Chumlyakov

Research output: Contribution to journalConference article

18 Citations (Scopus)

Abstract

Large changes in hysteresis are reported as a function of applied stress under thermal cycling experiments in NiTi single crystals. In the low Ni alloy the thermal hysteresis expanded with increasing stress while in the high Ni alloy the thermal hysteresis contracted with increasing stress. The results in both cases meet the limit obtained from Differential Scanning Calorimetry at zero stress. The changes are attributed to the relaxation of elastic stored energy which is primarily due to dislocations emanating at martensite/austenite interfaces. Modifications in thermodynamics formulation are proposed to account for the change in hysteresis via change in the elastic stored energy. Memory effects due to dislocation arrangements imposed under high stress thermal cycles on subsequent thermal hysteresis under low stresses were found to be significant, while variations in thermal hysteresis from cycle to cycle under constant stress are noted to be rather small.

Original languageEnglish (US)
Pages (from-to)3-10
Number of pages8
JournalJournal De Physique. IV : JP
Volume115
DOIs
StatePublished - Dec 1 2004
EventEUROMECH-MECAMAT'2003: 7th European Mechanics of Materials Conference on Adaptive Systems and Materials: Constitutive Materials and Hybrid Structures - Frejus, France
Duration: May 18 2003May 23 2003

Fingerprint

Hysteresis
hysteresis
cycles
Thermal cycling
thermal stresses
austenite
martensite
Thermal stress
Martensite
Austenite
Differential scanning calorimetry
heat measurement
Single crystals
Thermodynamics
formulations
Data storage equipment
thermodynamics
scanning
Hot Temperature
energy

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Sehitoglu, H. ; Hamilton, R. ; Maier, H. J. ; Chumlyakov, Y. / Hysteresis in NiTi alloys. In: Journal De Physique. IV : JP. 2004 ; Vol. 115. pp. 3-10.
@article{1314bc47a337490d82c6e0e1976aa5e5,
title = "Hysteresis in NiTi alloys",
abstract = "Large changes in hysteresis are reported as a function of applied stress under thermal cycling experiments in NiTi single crystals. In the low Ni alloy the thermal hysteresis expanded with increasing stress while in the high Ni alloy the thermal hysteresis contracted with increasing stress. The results in both cases meet the limit obtained from Differential Scanning Calorimetry at zero stress. The changes are attributed to the relaxation of elastic stored energy which is primarily due to dislocations emanating at martensite/austenite interfaces. Modifications in thermodynamics formulation are proposed to account for the change in hysteresis via change in the elastic stored energy. Memory effects due to dislocation arrangements imposed under high stress thermal cycles on subsequent thermal hysteresis under low stresses were found to be significant, while variations in thermal hysteresis from cycle to cycle under constant stress are noted to be rather small.",
author = "H. Sehitoglu and R. Hamilton and Maier, {H. J.} and Y. Chumlyakov",
year = "2004",
month = "12",
day = "1",
doi = "10.1051/jp4:2004115001",
language = "English (US)",
volume = "115",
pages = "3--10",
journal = "European Physical Journal: Special Topics",
issn = "1951-6355",
publisher = "Springer Verlag",

}

Sehitoglu, H, Hamilton, R, Maier, HJ & Chumlyakov, Y 2004, 'Hysteresis in NiTi alloys', Journal De Physique. IV : JP, vol. 115, pp. 3-10. https://doi.org/10.1051/jp4:2004115001

Hysteresis in NiTi alloys. / Sehitoglu, H.; Hamilton, R.; Maier, H. J.; Chumlyakov, Y.

In: Journal De Physique. IV : JP, Vol. 115, 01.12.2004, p. 3-10.

Research output: Contribution to journalConference article

TY - JOUR

T1 - Hysteresis in NiTi alloys

AU - Sehitoglu, H.

AU - Hamilton, R.

AU - Maier, H. J.

AU - Chumlyakov, Y.

PY - 2004/12/1

Y1 - 2004/12/1

N2 - Large changes in hysteresis are reported as a function of applied stress under thermal cycling experiments in NiTi single crystals. In the low Ni alloy the thermal hysteresis expanded with increasing stress while in the high Ni alloy the thermal hysteresis contracted with increasing stress. The results in both cases meet the limit obtained from Differential Scanning Calorimetry at zero stress. The changes are attributed to the relaxation of elastic stored energy which is primarily due to dislocations emanating at martensite/austenite interfaces. Modifications in thermodynamics formulation are proposed to account for the change in hysteresis via change in the elastic stored energy. Memory effects due to dislocation arrangements imposed under high stress thermal cycles on subsequent thermal hysteresis under low stresses were found to be significant, while variations in thermal hysteresis from cycle to cycle under constant stress are noted to be rather small.

AB - Large changes in hysteresis are reported as a function of applied stress under thermal cycling experiments in NiTi single crystals. In the low Ni alloy the thermal hysteresis expanded with increasing stress while in the high Ni alloy the thermal hysteresis contracted with increasing stress. The results in both cases meet the limit obtained from Differential Scanning Calorimetry at zero stress. The changes are attributed to the relaxation of elastic stored energy which is primarily due to dislocations emanating at martensite/austenite interfaces. Modifications in thermodynamics formulation are proposed to account for the change in hysteresis via change in the elastic stored energy. Memory effects due to dislocation arrangements imposed under high stress thermal cycles on subsequent thermal hysteresis under low stresses were found to be significant, while variations in thermal hysteresis from cycle to cycle under constant stress are noted to be rather small.

UR - http://www.scopus.com/inward/record.url?scp=32744476562&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=32744476562&partnerID=8YFLogxK

U2 - 10.1051/jp4:2004115001

DO - 10.1051/jp4:2004115001

M3 - Conference article

AN - SCOPUS:32744476562

VL - 115

SP - 3

EP - 10

JO - European Physical Journal: Special Topics

JF - European Physical Journal: Special Topics

SN - 1951-6355

ER -