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

Li-Wei Tseng, Ji Ma, B. C. Hornbuckle, I. Karaman, G. B. Thompson, Z. P. Luo, Y. I. Chumlyakov

Research output: Contribution to journalArticle

36 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 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 languageEnglish
Article number12246
Pages (from-to)234-244
Number of pages11
JournalActa Materialia
Volume97
DOIs
Publication statusPublished - 2015 Jul 15

Fingerprint

Precipitates
Compaction
Single crystals
Aging of materials
Temperature
Martensitic transformations
Coarsening
Shape memory effect
Hysteresis
Volume fraction
Recovery
Chemical analysis

All Science Journal Classification (ASJC) codes

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

Cite this

Tseng, Li-Wei ; Ma, Ji ; Hornbuckle, B. C. ; Karaman, I. ; Thompson, G. B. ; Luo, Z. P. ; Chumlyakov, Y. I. / The effect of precipitates on the superelastic response of [1 0 0] oriented FeMnAlNi single crystals under compression. In: Acta Materialia. 2015 ; Vol. 97. pp. 234-244.
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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 journalArticle

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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.

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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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