Abstract
Abstract FeMnAlNi shape memory alloys were recently discovered to have a small temperature dependence of the superelastic critical stress in a large superelastic temperature window from -196°C to 240°C. In this work, we investigated the effect of B2 nanoprecipitates on the superelastic characteristics of [1 0 0] oriented Fe43.5Mn34Al15Ni7.5 single crystals under compression, and found that the size, volume fraction and composition of precipitates strongly influence the transformation temperature, superelastic strain, critical stress for stress-induced martensitic transformation and stress hysteresis of the single crystals. The single crystals aged at 200°C for 3 h show 7.2% superelastic strain with the precipitate size of about 6-10 nm. Longer aging times or higher aging temperature reduces superelastic recovery due to the coarsening of the precipitates.
| Original language | English |
|---|---|
| Article number | 12246 |
| Pages (from-to) | 234-244 |
| Number of pages | 11 |
| Journal | Acta Materialia |
| Volume | 97 |
| DOIs | |
| Publication status | Published - 2015 Jul 15 |
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All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Ceramics and Composites
- Polymers and Plastics
- Metals and Alloys
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The effect of precipitates on the superelastic response of [1 0 0] oriented FeMnAlNi single crystals under compression. / Tseng, Li-Wei; Ma, Ji; Hornbuckle, B. C.; Karaman, I.; Thompson, G. B.; Luo, Z. P.; Chumlyakov, Y. I.
In: Acta Materialia, Vol. 97, 12246, 15.07.2015, p. 234-244.Research output: Contribution to journal › Article
TY - JOUR
T1 - The effect of precipitates on the superelastic response of [1 0 0] oriented FeMnAlNi single crystals under compression
AU - Tseng, Li-Wei
AU - Ma, Ji
AU - Hornbuckle, B. C.
AU - Karaman, I.
AU - Thompson, G. B.
AU - Luo, Z. P.
AU - Chumlyakov, Y. I.
PY - 2015/7/15
Y1 - 2015/7/15
N2 - Abstract FeMnAlNi shape memory alloys were recently discovered to have a small temperature dependence of the superelastic critical stress in a large superelastic temperature window from -196°C to 240°C. In this work, we investigated the effect of B2 nanoprecipitates on the superelastic characteristics of [1 0 0] oriented Fe43.5Mn34Al15Ni7.5 single crystals under compression, and found that the size, volume fraction and composition of precipitates strongly influence the transformation temperature, superelastic strain, critical stress for stress-induced martensitic transformation and stress hysteresis of the single crystals. The single crystals aged at 200°C for 3 h show 7.2% superelastic strain with the precipitate size of about 6-10 nm. Longer aging times or higher aging temperature reduces superelastic recovery due to the coarsening of the precipitates.
AB - Abstract FeMnAlNi shape memory alloys were recently discovered to have a small temperature dependence of the superelastic critical stress in a large superelastic temperature window from -196°C to 240°C. In this work, we investigated the effect of B2 nanoprecipitates on the superelastic characteristics of [1 0 0] oriented Fe43.5Mn34Al15Ni7.5 single crystals under compression, and found that the size, volume fraction and composition of precipitates strongly influence the transformation temperature, superelastic strain, critical stress for stress-induced martensitic transformation and stress hysteresis of the single crystals. The single crystals aged at 200°C for 3 h show 7.2% superelastic strain with the precipitate size of about 6-10 nm. Longer aging times or higher aging temperature reduces superelastic recovery due to the coarsening of the precipitates.
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U2 - 10.1016/j.actamat.2015.06.061
DO - 10.1016/j.actamat.2015.06.061
M3 - Article
AN - SCOPUS:84937569781
VL - 97
SP - 234
EP - 244
JO - Acta Materialia
JF - Acta Materialia
SN - 1359-6454
M1 - 12246
ER -