Details

Autor(en) / Beteiligte

• Kuksgauzen, I. V.
• Poklonov, V. V.
• Chumlyakov, Yu. I.
• Kuksgauzen, D. A.
• Kirillov, V. A.

Titel

Superelasticity in Quenched and Aged FeMnAlNiTi Oligocrystals under Compression

Ist Teil von

• Russian physics journal, 2021-04, Vol.63 (12), p.2205-2211

Ort / Verlag

New York: Springer US

Erscheinungsjahr

2021

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• The paper studies superelasticity in a 203–523 K temperature range of the 42.5Fe-34Mn-15Al-7.5Ni-1Ti at.% oligocrystals quenched and aged at 473 K for 3 hours. It is shown that the critical stress for the stress-induced α-γ' martensitic transformation slightly grows with the test temperature increasing in accordance with the Clausius–Clapeyron relation. The value of α = dσc r /dT characterizing this growth in quenched and aged oligocrystals, is close to 0.46 and 0.37 MPa/K, respectively. Regardless of the structural condition, superelasticity is observed within the whole mentioned temperature range. At room temperature, the maximum superelasticity is 6.0 and 6.8% of quenched and aged oligocrystals, respectively. A rapid degradation of the functional properties of oligocrystals is detected during the loading-unloading cycles at room temperature. After ten isothermal loading-unloading cycles, residual strain of 2.8 and 1.7% is observed in quenched and aged oligocrystals, respectively.