Abstract
Martensitic phase transformation in NiTi shape memory alloys (SMA) occurs over a hierarchy of spatial scales, as evidenced from observed multiscale patterns of the martensitic phase fraction, which depend on the material microstructure and on the size of the SMA specimen. This paper presents a methodology for the multiscale tracking of the thermally induced martensitic phase transformation process in NiTi SMA. Fine scale stochastic phase field simulations are coupled to macroscale experimental measurements through the compound wavelet matrix method (CWM). A novel process for obtaining CWM fine scale wavelet coefficients is used that enhances the effectiveness of the method in transferring uncertainties from fine to coarse scales, and also ensures the preservation of spatial correlations in the phase fraction pattern. Size effects, well-documented in the literature, play an important role in designing the multiscale tracking methodology. Molecular dynamics (MD) simulations are employed to verify the phase field simulations in terms of different statistical measures and to demonstrate size effects at the nanometer scale. The effects of thermally induced martensite phase fraction uncertainties on the constitutive response of NiTi SMA is demonstrated.
| Original language | English (US) |
|---|---|
| Article number | 075006 |
| Journal | Modelling and Simulation in Materials Science and Engineering |
| Volume | 24 |
| Issue number | 7 |
| DOIs | |
| State | Published - Sep 29 2016 |
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Keywords
- martensitic phase transformation
- multiscale coupling
- NiTi SMA
- phase field simulations
- predictive CWM
- size effect
ASJC Scopus subject areas
- Modeling and Simulation
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials
- Computer Science Applications
Cite this
Linking simulations and experiments for the multiscale tracking of thermally induced martensitic phase transformation in NiTi SMA. / Gur, Sourav; Frantziskonis, George N.
In: Modelling and Simulation in Materials Science and Engineering, Vol. 24, No. 7, 075006, 29.09.2016.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Linking simulations and experiments for the multiscale tracking of thermally induced martensitic phase transformation in NiTi SMA
AU - Gur, Sourav
AU - Frantziskonis, George N
PY - 2016/9/29
Y1 - 2016/9/29
N2 - Martensitic phase transformation in NiTi shape memory alloys (SMA) occurs over a hierarchy of spatial scales, as evidenced from observed multiscale patterns of the martensitic phase fraction, which depend on the material microstructure and on the size of the SMA specimen. This paper presents a methodology for the multiscale tracking of the thermally induced martensitic phase transformation process in NiTi SMA. Fine scale stochastic phase field simulations are coupled to macroscale experimental measurements through the compound wavelet matrix method (CWM). A novel process for obtaining CWM fine scale wavelet coefficients is used that enhances the effectiveness of the method in transferring uncertainties from fine to coarse scales, and also ensures the preservation of spatial correlations in the phase fraction pattern. Size effects, well-documented in the literature, play an important role in designing the multiscale tracking methodology. Molecular dynamics (MD) simulations are employed to verify the phase field simulations in terms of different statistical measures and to demonstrate size effects at the nanometer scale. The effects of thermally induced martensite phase fraction uncertainties on the constitutive response of NiTi SMA is demonstrated.
AB - Martensitic phase transformation in NiTi shape memory alloys (SMA) occurs over a hierarchy of spatial scales, as evidenced from observed multiscale patterns of the martensitic phase fraction, which depend on the material microstructure and on the size of the SMA specimen. This paper presents a methodology for the multiscale tracking of the thermally induced martensitic phase transformation process in NiTi SMA. Fine scale stochastic phase field simulations are coupled to macroscale experimental measurements through the compound wavelet matrix method (CWM). A novel process for obtaining CWM fine scale wavelet coefficients is used that enhances the effectiveness of the method in transferring uncertainties from fine to coarse scales, and also ensures the preservation of spatial correlations in the phase fraction pattern. Size effects, well-documented in the literature, play an important role in designing the multiscale tracking methodology. Molecular dynamics (MD) simulations are employed to verify the phase field simulations in terms of different statistical measures and to demonstrate size effects at the nanometer scale. The effects of thermally induced martensite phase fraction uncertainties on the constitutive response of NiTi SMA is demonstrated.
KW - martensitic phase transformation
KW - multiscale coupling
KW - NiTi SMA
KW - phase field simulations
KW - predictive CWM
KW - size effect
UR - http://www.scopus.com/inward/record.url?scp=84991826637&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84991826637&partnerID=8YFLogxK
U2 - 10.1088/0965-0393/24/7/075006
DO - 10.1088/0965-0393/24/7/075006
M3 - Article
VL - 24
JO - Modelling and Simulation in Materials Science and Engineering
JF - Modelling and Simulation in Materials Science and Engineering
SN - 0965-0393
IS - 7
M1 - 075006
ER -