Details
| Original language | English |
|---|---|
| Pages (from-to) | 3-10 |
| Number of pages | 8 |
| Journal | Journal De Physique. IV : JP |
| Volume | 115 |
| Publication status | Published - 2004 |
| Externally published | Yes |
| Event | EUROMECH-MECAMAT'2003: 7th European Mechanics of Materials Conference on Adaptive Systems and Materials: Constitutive Materials and Hybrid Structures - Frejus, France Duration: 18 May 2003 → 23 May 2003 |
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.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- General Physics and Astronomy
Cite this
- Standard
- Harvard
- Apa
- Vancouver
- BibTeX
- RIS
In: Journal De Physique. IV : JP, Vol. 115, 2004, p. 3-10.
Research output: Contribution to journal › Conference article › Research › peer review
}
TY - JOUR
T1 - Hysteresis in NiTi alloys
AU - Sehitoglu, H.
AU - Hamilton, R.
AU - Maier, H. J.
AU - Chumlyakov, Y.
PY - 2004
Y1 - 2004
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
U2 - 10.1051/jp4:2004115001
DO - 10.1051/jp4:2004115001
M3 - Conference article
AN - SCOPUS:32744476562
VL - 115
SP - 3
EP - 10
JO - Journal De Physique. IV : JP
JF - Journal De Physique. IV : JP
SN - 1155-4339
T2 - EUROMECH-MECAMAT'2003: 7th European Mechanics of Materials Conference on Adaptive Systems and Materials: Constitutive Materials and Hybrid Structures
Y2 - 18 May 2003 through 23 May 2003
ER -