The effect of precipitates on the superelastic response of [1 0 0] oriented FeMnAlNi single crystals under compression

L. W. Tseng; Ji Ma; B. C. Hornbuckle; I. Karaman; G. B. Thompson; Z. P. Luo; Y. I. Chumlyakov

doi:10.1016/j.actamat.2015.06.061

The effect of precipitates on the superelastic response of [1 0 0] oriented FeMnAlNi single crystals under compression

L. W. Tseng, Ji Ma, B. C. Hornbuckle, I. Karaman, G. B. Thompson, Z. P. Luo, Y. I. Chumlyakov

Department of Mechatronic Engineering

Research output: Contribution to journal › Article

45 Citations (Scopus)

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 Fe_43.5Mn₃₄Al₁₅Ni_7.5 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	https://doi.org/10.1016/j.actamat.2015.06.061
Publication status	Published - 2015 Jul 15

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Polymers and Plastics
Metals and Alloys

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title = "The effect of precipitates on the superelastic response of [1 0 0] oriented FeMnAlNi single crystals under compression",

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.",

author = "Tseng, {L. W.} and Ji Ma and Hornbuckle, {B. C.} and I. Karaman and Thompson, {G. B.} and Luo, {Z. P.} and Chumlyakov, {Y. I.}",

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TY - JOUR

T1 - The effect of precipitates on the superelastic response of [1 0 0] oriented FeMnAlNi single crystals under compression

AU - Tseng, L. W.

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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