Open AccessВлияние предварительной сжимающей нагрузки на работу, производимую монокристаллами Cu-Al-Ni при взрывном восстановлении деформации памяти формы
Author(s) -
R. B. Timashov,
П.Н. Якушев,
С. А. Пульнев,
V. I. Nikolaev
Publication year - 2022
Publication title -
pisʹma v žurnal tehničeskoj fiziki
Language(s) - English
Resource type - Journals
eISSN - 1726-7471
pISSN - 0320-0116
DOI - 10.21883/pjtf.2022.03.51983.19004
Subject(s) - materials science , martensite , shape memory alloy , diffusionless transformation , crystal (programming language) , compression (physics) , deformation (meteorology) , metallurgy , stress (linguistics) , strain (injury) , crystallography , composite material , calorimetry , thermodynamics , microstructure , chemistry , linguistics , philosophy , computer science , programming language , medicine , physics
The ability of martensitic single crystals Cu 82.5 wt.% - Al 13.5 wt.% - Ni 4.0 to perform work has been investigated. It is shown that weight placed on the crystal is transferred smoothly or by impact during shape memory strain recovery (SMS) Moving depends on the preliminary deformation of the crystal. An influence of the preload on this work is studied. It was found that the transition to the impact mode occurs after preliminary compression of the crystal to the full SMS (~ 9%), when the load is more than twice the stress of the detwinning of martensite. DSC calorimetry showed that after compression to 200–250 MPa and higher sharp narrowing of reverse martensitic transformation (RMT) peak takes place.