Influence of Heat Treatment on the Mechanical and Thermomechanical Characteristics of a Ti50Pd30Ni20 Alloy with High-Temperature Shape Memory Effect

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Дәйексөз келтіру

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Ашық рұқсат Ашық рұқсат
Рұқсат жабық Рұқсат берілді
Рұқсат жабық Тек жазылушылар үшін

Аннотация

Abstract—The influence of annealing at 600°C on the mechanical and thermomechanical characteristics of a Ti50Pd30Ni20 alloy with high-temperature shape memory effect (SME) is studied. The best strength (σu = 1030 ± 140 MPa) and plastic (ε0max">εε0max = 11.5 ± 6.0%, δres = 6 ± 4%) characteristics have been obtained after annealing at 600°C. The maximum thermally recoverable strain (εSME = 4.3%) and the maximum degree of shape recovery (ηSME = 67%) are achieved after annealing at 600°C after preliminary induced tensile deformation at temperatures td =235–230°C and a strain rate ε˙">εε˙ ≈ 2.8 × 10–3 s–1; in this case, the reverse martensitic transformation temperatures characterizing the main shape recovery are AsSME = 220°C and AfSME = 249°C. Taking into account the studies carried out before, we found that the martensitic transformation temperatures increase almost linearly and, conversely, the SME and the degrees of shape recovery decrease as the titanium nickelide is alloyed with palladium in the content range from 30 to 50 at %. Linear regression equations are derived. The results obtained are used for designing safety devices of, e.g., crosscutting and pushing types.

Авторлар туралы

N. Popov

Russian Federal Nuclear Center–All-Russian Research Institute of Experimental Physics (RFNC-VNIIEF)

Email: nnpopov@vniief.ru
Sarov, Nizhny Novgorod oblast, Russia

D. Presnyakov

Russian Federal Nuclear Center–All-Russian Research Institute of Experimental Physics (RFNC-VNIIEF)

Email: NNPopov@vniief.ru
Sarov, Nizhny Novgorod oblast, Russia

I. Ryzhov

Russian Federal Nuclear Center–All-Russian Research Institute of Experimental Physics (RFNC-VNIIEF)

Email: NNPopov@vniief.ru
Sarov, Nizhny Novgorod oblast, Russia

A. Kostyleva

Russian Federal Nuclear Center–All-Russian Research Institute of Experimental Physics (RFNC-VNIIEF)

Хат алмасуға жауапты Автор.
Email: NNPopov@vniief.ru
Sarov, Nizhny Novgorod oblast, Russia

Әдебиет тізімі

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