Details
| Original language | English |
|---|---|
| Pages (from-to) | 765-773 |
| Number of pages | 9 |
| Journal | Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science |
| Volume | 29 A |
| Issue number | 3 |
| Publication status | Published - Mar 1998 |
| Externally published | Yes |
Abstract
The effect of different uniaxial and triaxial stress states on the stress-induced martensitic transformation in CuZnAl was investigated. Under uniaxial loading, it was found that the compressive stress level required to macroscopically trigger the transformation was 34 pct larger than the required tensile stress. The triaxial tests produced effective stress-strain curves with critical transformation stress levels in between the tensile and compressive results. It was found that pure hydrostatic pressure was unable to experimentally trigger a stress-induced martensitic transformation due to the large pressures required. Traditional continuum-based transformation theories, with transformation criteria and Clausius-Clapeyron equations modified to depend on the volume change during transformation, could not properly predict stress-state effects in CuZnAl. Considering a combination of hydrostatic (volume change) effects and crystallographic effects (number of transforming variants), a micro-mechanical model is used to estimate the dependence of the critical macroscopic transformation stress on the stress state.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Condensed Matter Physics
- Engineering(all)
- Mechanics of Materials
- Materials Science(all)
- Metals and Alloys
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In: Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science, Vol. 29 A, No. 3, 03.1998, p. 765-773.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Stress-induced martensitic phase transformations in polycrystalline CuZnAl shape memory alloys under different stress states
AU - Gall, Ken
AU - Sehitoglu, Huseyin
AU - Maier, Hans J.
AU - Jacobus, Kurt
PY - 1998/3
Y1 - 1998/3
N2 - The effect of different uniaxial and triaxial stress states on the stress-induced martensitic transformation in CuZnAl was investigated. Under uniaxial loading, it was found that the compressive stress level required to macroscopically trigger the transformation was 34 pct larger than the required tensile stress. The triaxial tests produced effective stress-strain curves with critical transformation stress levels in between the tensile and compressive results. It was found that pure hydrostatic pressure was unable to experimentally trigger a stress-induced martensitic transformation due to the large pressures required. Traditional continuum-based transformation theories, with transformation criteria and Clausius-Clapeyron equations modified to depend on the volume change during transformation, could not properly predict stress-state effects in CuZnAl. Considering a combination of hydrostatic (volume change) effects and crystallographic effects (number of transforming variants), a micro-mechanical model is used to estimate the dependence of the critical macroscopic transformation stress on the stress state.
AB - The effect of different uniaxial and triaxial stress states on the stress-induced martensitic transformation in CuZnAl was investigated. Under uniaxial loading, it was found that the compressive stress level required to macroscopically trigger the transformation was 34 pct larger than the required tensile stress. The triaxial tests produced effective stress-strain curves with critical transformation stress levels in between the tensile and compressive results. It was found that pure hydrostatic pressure was unable to experimentally trigger a stress-induced martensitic transformation due to the large pressures required. Traditional continuum-based transformation theories, with transformation criteria and Clausius-Clapeyron equations modified to depend on the volume change during transformation, could not properly predict stress-state effects in CuZnAl. Considering a combination of hydrostatic (volume change) effects and crystallographic effects (number of transforming variants), a micro-mechanical model is used to estimate the dependence of the critical macroscopic transformation stress on the stress state.
UR - http://www.scopus.com/inward/record.url?scp=0032014533&partnerID=8YFLogxK
U2 - 10.1007/s11661-998-0267-y
DO - 10.1007/s11661-998-0267-y
M3 - Article
AN - SCOPUS:0032014533
VL - 29 A
SP - 765
EP - 773
JO - Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
JF - Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
SN - 1073-5623
IS - 3
ER -