Influence of heat treatment and stress state on the functional and mechanical properties of the [001]-oriented single crystals of fenicoalti alloy | Izvestiya vuzov. Fizika. 2020. № 9. DOI: 10.17223/00213411/63/9/132

Influence of heat treatment and stress state on the functional and mechanical properties of the [001]-oriented single crystals of fenicoalti alloy

The effect of the γ'- and β-phase particles on the thermoelastic γ-α' martensitic transformation (MT) during cooling/heating and under stress was studied under tension and compression on the [001]-oriented single crystals of Fe-28%Ni-17%Co-11.5%Al-2.5%Ti (at.%) alloy. The effect of the aging regime on the M_s temperature was shown. Maximum increase in the M_s temperature by 100 K was found with the simultaneous precipitation of the γ'- and β-phase particles after two-stage aging of 4+4h at 873 K, in comparison with single-stage aging for 8h. In crystals with γ' and γ'+β-phases particles the difference (asymmetry) of the stresses for the stress-induced γ-α' MT σ_cr and value α = d σ_cr/ dT under tension and compression were not observed. The absence of asymmetry of the σ _cr and value α = d σ_cr/ dT are due to close values of the shape memory effect (SME) and superelasticity (SE) under tension and compression. The values of SME and SE were decreased when β-phase particles are precipitated.

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Keywords

монокристаллы сплава на основе железа, термоупругое мартенситное превращение, сверхэластичность, эффект памяти формы, наноразмерные частицы γ'- и β-фаз, single crystals of iron-based alloy, thermoelastic martensitic transformation, superelasticity, shape memory effect, nanosized particles of γ'- and β-phases

Authors

Name	Organization	E-mail
Kuksgauzen I.V.	V.D. Kuznetsov Siberian Physical-Technical Institute at Tomsk State University	irbas@sibmail.com
Chumlyakov Y.I.	V.D. Kuznetsov Siberian Physical-Technical Institute at Tomsk State University	chum@phys.tsu.ru
Kireeva I.V.	V.D. Kuznetsov Siberian Physical-Technical Institute at Tomsk State University	kireeva@spti.tsu.ru
Poklonov V.V.	V.D. Kuznetsov Siberian Physical-Technical Institute at Tomsk State University	poklonov_vyacheslav@mail.ru
Kuksgauzen D.A.	V.D. Kuznetsov Siberian Physical-Technical Institute at Tomsk State University	kuksgauzen90@gmail.com
Kirillov V.A.	V.D. Kuznetsov Siberian Physical-Technical Institute at Tomsk State University	vladk@sibmail.com
Lauhoff C.	Institute für Werkstofftechnik, Universität Kassel	lauhoff@uni-kassel.de
Niendorf T.	Institute für Werkstofftechnik, Universität Kassel	niendorf@uni-kassel.de
Krooß P.	Institute für Werkstofftechnik, Universität Kassel	krooss@uni-kassel.de

Всего: 9

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