Multiscale twin hierarchy in NiMnGa shape memory alloys with Fe and Cu
Journal Article
·
· Acta Materialia
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Univ. of Tennessee, Knoxville, TN (United States)
- Carnegie Inst. of Washington, Argonne, IL (United States). Geophysical Lab.
- Center for High Pressure Science and Technology Advanced Research (HPSTAR), Shanghai (China)
X-ray microdiffraction and scanning electron microscopy studies reveal 10 M martensitic structure with a highly correlated multiscale twin hierarchy organization in NiMnGaFeCu shape memory alloys. In this paper, high compatibility is found at the twin interfaces resulting in a highly correlated twinned lattice orientation across several laminate levels. The lattice unit cell is described as monoclinic I-centered with a = 4.28 Å, b = 4.27 Å, c = 5.40 Å, γ = 78.5°. The modulation is found parallel to the b axis. Finally, thin tapered needle-like lamellae and branching are observed near the twin boundaries.
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE National Nuclear Security Administration (NNSA)
- Contributing Organization:
- Carnegie Inst. of Washington, Argonne, IL (United States)
- Grant/Contract Number:
- NA0001974; FG02-99ER45775; AC02-06CH11357
- OSTI ID:
- 1286685
- Alternate ID(s):
- OSTI ID: 1250957
- Journal Information:
- Acta Materialia, Vol. 87; ISSN 1359-6454
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Cited by: 6 works
Citation information provided by
Web of Science
Web of Science
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