Details
| Original language | English |
|---|---|
| Pages (from-to) | 280-289 |
| Number of pages | 10 |
| Journal | Materials Science and Engineering A |
| Volume | 359 |
| Issue number | 1-2 |
| Publication status | Published - 25 Oct 2003 |
| Externally published | Yes |
Abstract
Utilizing electrical resistance measurements in combination with strain observations on single crystals, it was possible to distinguish the austenite to martensite transformation from the detwinning of the martensite behavior during deformation of NiTiCu shape memory alloys. It was found that the electrical resistance change associated with the detwinning of the martensite variants was as high as 45% in deformation experiments below the martensite start temperatures. When the conditions led to partial detwinning of the martensite variants (tension at 20°C) the corresponding electrical resistance changes were 20%. In the tension case at 20°C, the electrical resistance measurements convincingly identified the end of the stress plateau as the conclusion of the transformation and the onset of detwinning. The detwinning is also activated following austenite to martensite transformation under thermal cycling experiments under a constant stress (shape memory under constant stress). In this case, the electrical resistance change associated with detwinning also reached high levels (45%) and coincided with the change in slope of the strain-temperature curves.
Keywords
- Detwinning, Electrical resistance, Martensite, NiTiCu, Shape memory
ASJC Scopus subject areas
- Materials Science(all)
- General Materials Science
- Physics and Astronomy(all)
- Condensed Matter Physics
- Engineering(all)
- Mechanics of Materials
- Engineering(all)
- Mechanical Engineering
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In: Materials Science and Engineering A, Vol. 359, No. 1-2, 25.10.2003, p. 280-289.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Transformation and detwinning induced electrical resistance variations in NiTiCu
AU - Kotil, T.
AU - Sehitoglu, H.
AU - Maier, H. J.
AU - Chumlyakov, Y. I.
N1 - Funding Information: This work was partially supported by the Air Force Office of Scientific Research, grant no. F49620-01-1-0136.
PY - 2003/10/25
Y1 - 2003/10/25
N2 - Utilizing electrical resistance measurements in combination with strain observations on single crystals, it was possible to distinguish the austenite to martensite transformation from the detwinning of the martensite behavior during deformation of NiTiCu shape memory alloys. It was found that the electrical resistance change associated with the detwinning of the martensite variants was as high as 45% in deformation experiments below the martensite start temperatures. When the conditions led to partial detwinning of the martensite variants (tension at 20°C) the corresponding electrical resistance changes were 20%. In the tension case at 20°C, the electrical resistance measurements convincingly identified the end of the stress plateau as the conclusion of the transformation and the onset of detwinning. The detwinning is also activated following austenite to martensite transformation under thermal cycling experiments under a constant stress (shape memory under constant stress). In this case, the electrical resistance change associated with detwinning also reached high levels (45%) and coincided with the change in slope of the strain-temperature curves.
AB - Utilizing electrical resistance measurements in combination with strain observations on single crystals, it was possible to distinguish the austenite to martensite transformation from the detwinning of the martensite behavior during deformation of NiTiCu shape memory alloys. It was found that the electrical resistance change associated with the detwinning of the martensite variants was as high as 45% in deformation experiments below the martensite start temperatures. When the conditions led to partial detwinning of the martensite variants (tension at 20°C) the corresponding electrical resistance changes were 20%. In the tension case at 20°C, the electrical resistance measurements convincingly identified the end of the stress plateau as the conclusion of the transformation and the onset of detwinning. The detwinning is also activated following austenite to martensite transformation under thermal cycling experiments under a constant stress (shape memory under constant stress). In this case, the electrical resistance change associated with detwinning also reached high levels (45%) and coincided with the change in slope of the strain-temperature curves.
KW - Detwinning
KW - Electrical resistance
KW - Martensite
KW - NiTiCu
KW - Shape memory
UR - http://www.scopus.com/inward/record.url?scp=0041324774&partnerID=8YFLogxK
U2 - 10.1016/S0921-5093(03)00365-4
DO - 10.1016/S0921-5093(03)00365-4
M3 - Article
AN - SCOPUS:0041324774
VL - 359
SP - 280
EP - 289
JO - Materials Science and Engineering A
JF - Materials Science and Engineering A
SN - 0921-5093
IS - 1-2
ER -