Details
| Original language | English |
|---|---|
| Article number | S11 |
| Pages (from-to) | S108-S114 |
| Journal | Smart materials and structures |
| Volume | 16 |
| Issue number | 1 |
| Publication status | Published - 1 Jan 2007 |
| Externally published | Yes |
Abstract
The purpose of this paper is twofold: to establish the magnitude of detwinning stress levels of non-modulated martensite in Ni53Mn 25Ga22 as a function of heat treatments utilizing single crystals, and to study the shape memory strains from constant-load temperature cycling experiments for aged and unaged conditions. The maximum transformation strains of 5.2% are consistent with the theoretical predictions based on energy minimization theory. The results exhibit a remarkable narrowing of the thermal hysteresis (as low as 2 °C) with increasing applied stress and a considerable two-way shape memory effect. Using microscopy, it is shown that aging produces a finer martensitic plate structure with an accompanying increase in detwinning stress compared to the unaged case.
ASJC Scopus subject areas
- Computer Science(all)
- Signal Processing
- Engineering(all)
- Civil and Structural Engineering
- Physics and Astronomy(all)
- Atomic and Molecular Physics, and Optics
- Materials Science(all)
- General Materials Science
- Physics and Astronomy(all)
- Condensed Matter Physics
- Engineering(all)
- Mechanics of Materials
- Engineering(all)
- Electrical and Electronic Engineering
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In: Smart materials and structures, Vol. 16, No. 1, S11, 01.01.2007, p. S108-S114.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Shape memory and martensite deformation response of Ni2MnGa
AU - Callaway, J. D.
AU - Hamilton, R. F.
AU - Sehitoglu, H.
AU - Miller, N.
AU - Maier, H. J.
AU - Chumlyakov, Y.
PY - 2007/1/1
Y1 - 2007/1/1
N2 - The purpose of this paper is twofold: to establish the magnitude of detwinning stress levels of non-modulated martensite in Ni53Mn 25Ga22 as a function of heat treatments utilizing single crystals, and to study the shape memory strains from constant-load temperature cycling experiments for aged and unaged conditions. The maximum transformation strains of 5.2% are consistent with the theoretical predictions based on energy minimization theory. The results exhibit a remarkable narrowing of the thermal hysteresis (as low as 2 °C) with increasing applied stress and a considerable two-way shape memory effect. Using microscopy, it is shown that aging produces a finer martensitic plate structure with an accompanying increase in detwinning stress compared to the unaged case.
AB - The purpose of this paper is twofold: to establish the magnitude of detwinning stress levels of non-modulated martensite in Ni53Mn 25Ga22 as a function of heat treatments utilizing single crystals, and to study the shape memory strains from constant-load temperature cycling experiments for aged and unaged conditions. The maximum transformation strains of 5.2% are consistent with the theoretical predictions based on energy minimization theory. The results exhibit a remarkable narrowing of the thermal hysteresis (as low as 2 °C) with increasing applied stress and a considerable two-way shape memory effect. Using microscopy, it is shown that aging produces a finer martensitic plate structure with an accompanying increase in detwinning stress compared to the unaged case.
UR - http://www.scopus.com/inward/record.url?scp=33947699436&partnerID=8YFLogxK
U2 - 10.1088/0964-1726/16/1/S11
DO - 10.1088/0964-1726/16/1/S11
M3 - Article
AN - SCOPUS:33947699436
VL - 16
SP - S108-S114
JO - Smart materials and structures
JF - Smart materials and structures
SN - 0964-1726
IS - 1
M1 - S11
ER -