Hydrogen’s effect on the shape memory effect of TiNi alloy single crystals

Hydrogen’s effect on the shape memory effect of TiNi alloy single crystals

Hydrogen’s effect on the shape memory effect (SME) of [117]-oriented Ti49.7-Ni50.3 (at.%) alloy single crystals, with a B2–B190 martensitic transformation (MT), was studied after being electrolytically hydrogenated at a current density of 1500 A/m2 for 3 h at room temperature under isobaric tensile...

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Bibliographic Details
Published in:Metals Vol. 13, № 7. P. 1324 (1-14)
Other Authors: Kireeva, Irina V. физик, Chumlyakov, Yuri I., Yakovleva, Liya P., Vyrodova, Anna V.
Format: Article
Language:English
Subjects:
эффект памяти формы
водород
монокристаллы
TiNi сплавы
напряжение
статьи в журналах
Online Access:http://vital.lib.tsu.ru/vital/access/manager/Repository/koha:001132680
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245 1 0 |a Hydrogen’s effect on the shape memory effect of TiNi alloy single crystals  |c I. V. Kireeva, Y. I. Chumlyakov, L. P. Yakovleva, A. V. Vyrodova 
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520 3 |a Hydrogen’s effect on the shape memory effect (SME) of [117]-oriented Ti49.7-Ni50.3 (at.%) alloy single crystals, with a B2–B190 martensitic transformation (MT), was studied after being electrolytically hydrogenated at a current density of 1500 A/m2 for 3 h at room temperature under isobaric tensile deformation. It was shown that, under the used hydrogenation regime, hydrogen was in a solid solution and lowered the elastic modulus of B190 martensite. The hydrogen in a solid solution increased (i) the yield strength 0.1 of the initial B2 phase by 100 MPa at Md temperature, (ii) the 0.1 of the stress-induced B2–B190 MT by 25 MPa at Ms temperature, and (iii) the plasticity of B190 martensite relative to the hydrogen-free crystals. At the same level of external stresses, the SME in the hydrogenated crystals was greater than that in hydrogen-free crystals. At external tensile stresses ex = 200 MPa, the SME was 4.4 0.2% in the hydrogenated crystals and 1.8 0.2% without hydrogen. Hydrogen initiated a two-way SME of 0.5 0.2% at ex = 0 MPa, which was absent in the hydrogen-free crystals. The physical reasons leading to an increase in the SME upon hydrogenation are discussed. 
653 |a эффект памяти формы 
653 |a водород 
653 |a монокристаллы 
653 |a TiNi сплавы 
653 |a напряжение 
655 4 |a статьи в журналах 
700 1 |a Kireeva, Irina V.  |c физик 
700 1 |a Chumlyakov, Yuri I. 
700 1 |a Yakovleva, Liya P. 
700 1 |a Vyrodova, Anna V. 
773 0 |t Metals  |d 2023  |g Vol. 13, № 7. P. 1324 (1-14)  |x 2075-4701 
852 4 |a RU-ToGU 
856 4 |u http://vital.lib.tsu.ru/vital/access/manager/Repository/koha:001132680 
908 |a статья 
942 |2 udc 
999 |c 1132680  |d 1132680 

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