The effect of precipitates on the superelastic response of [1 0 0] oriented FeMnAlNi single crystals under compression
Document Type
Article
Publication Date
7-15-2015
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.
Recommended Citation
Tseng, L. W.; Ma, Ji; Hornbuckle, B. C.; Karaman, I.; Thompson, G. B.; Luo, Z. P.; and Chumlyakov, Y. I., "The effect of precipitates on the superelastic response of [1 0 0] oriented FeMnAlNi single crystals under compression" (2015). College of Health, Science, and Technology. 1102.
https://digitalcommons.uncfsu.edu/college_health_science_technology/1102