Details
| Originalsprache | Englisch |
|---|---|
| Seiten (von - bis) | 1503-1513 |
| Seitenumfang | 11 |
| Fachzeitschrift | International Journal of Materials Research |
| Jahrgang | 101 |
| Ausgabenummer | 12 |
| Publikationsstatus | Veröffentlicht - Dez. 2010 |
| Extern publiziert | Ja |
Abstract
This paper reports on the role of repeated stress-induced martensite transformations at different temperatures (referred to as "training") on the pseudoelasticity and microstructural evolution of as-grown Co 49Ni21Ga30 [001]-oriented shape memory alloy single crystals under compression. The training resulted in a reduction in transformation stress levels and a stable microstructure with a multi-variant configuration reducing the observed transformation strains. Training also improved the recoverability giving way to a large pseudoelastic temperature window of 400 °C. In-situ microscopy revealed the martensite stabilization to be due to pinning of moving interfaces especially at temperatures above 120°C. An insight into the evolution of microstructure and stress-strain behavior in terms of stress hysteresis changes with test temperature is provided, and the possible operant mechanisms are discussed.
ASJC Scopus Sachgebiete
- Physik und Astronomie (insg.)
- Physik der kondensierten Materie
- Chemie (insg.)
- Physikalische und Theoretische Chemie
- Werkstoffwissenschaften (insg.)
- Metalle und Legierungen
- Werkstoffwissenschaften (insg.)
- Werkstoffchemie
Zitieren
- Standard
- Harvard
- Apa
- Vancouver
- BibTex
- RIS
in: International Journal of Materials Research, Jahrgang 101, Nr. 12, 12.2010, S. 1503-1513.
Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review
}
TY - JOUR
T1 - High-temperature in-situ microscopy during stress-induced phase transformations in Co49Ni21Ga30 shape memory alloy single crystals
AU - Dadda, Jayaram
AU - Maier, Hans Jürgen
AU - Karaman, Ibrahim
AU - Chumlyakov, Yuri
PY - 2010/12
Y1 - 2010/12
N2 - This paper reports on the role of repeated stress-induced martensite transformations at different temperatures (referred to as "training") on the pseudoelasticity and microstructural evolution of as-grown Co 49Ni21Ga30 [001]-oriented shape memory alloy single crystals under compression. The training resulted in a reduction in transformation stress levels and a stable microstructure with a multi-variant configuration reducing the observed transformation strains. Training also improved the recoverability giving way to a large pseudoelastic temperature window of 400 °C. In-situ microscopy revealed the martensite stabilization to be due to pinning of moving interfaces especially at temperatures above 120°C. An insight into the evolution of microstructure and stress-strain behavior in terms of stress hysteresis changes with test temperature is provided, and the possible operant mechanisms are discussed.
AB - This paper reports on the role of repeated stress-induced martensite transformations at different temperatures (referred to as "training") on the pseudoelasticity and microstructural evolution of as-grown Co 49Ni21Ga30 [001]-oriented shape memory alloy single crystals under compression. The training resulted in a reduction in transformation stress levels and a stable microstructure with a multi-variant configuration reducing the observed transformation strains. Training also improved the recoverability giving way to a large pseudoelastic temperature window of 400 °C. In-situ microscopy revealed the martensite stabilization to be due to pinning of moving interfaces especially at temperatures above 120°C. An insight into the evolution of microstructure and stress-strain behavior in terms of stress hysteresis changes with test temperature is provided, and the possible operant mechanisms are discussed.
KW - DIC
KW - High-temperature pseudoelasticity
KW - High-temperature shape memory alloys
KW - Martensite stabilization
KW - Stress-induced martensite
UR - http://www.scopus.com/inward/record.url?scp=78650489868&partnerID=8YFLogxK
U2 - 10.3139/146.110427
DO - 10.3139/146.110427
M3 - Article
AN - SCOPUS:78650489868
VL - 101
SP - 1503
EP - 1513
JO - International Journal of Materials Research
JF - International Journal of Materials Research
SN - 1862-5282
IS - 12
ER -