Dynamic deformations tests of Ni3Al based intermetallic alloy by using the split Hopkinson pressure bar technique

J. Min. Metall. Sect. B-Metall. 55 (1) B (2019) 129-134. DOI:10.2298/JMMB181113014J
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Abstract

In this work, the Ni 3 Al-based intermetallic alloy was subjected to room temperature dynamic plastic deformation tests by using a split Hopkinson pressure bar technique. The dynamic compression processes were carried out at strain rates in the range of =(1.9×102 ÷ 1×104 s-1 ). A strong impact of applied deformation conditions on microstructure and mechanical properties evolution in the examined Ni 3 Al intermetallic, was documented. Generally, very high maximum compressive stress values were obtained, reaching 5500 MPa for the sample deformed at the highest strain rate (i.e. =1×104 s-1 ). The results of performed SEM/EBSD evaluation point towards an occurrence of dynamic recovery and recrystallization phenomena in Ni 3Al samples deformed at high strain rates.
Keywords: Ni3Al-based alloy; Split Hopkinson pressure bar; SEM/EBSD analysis.
Correspondence Address:
P. Jozwik, Military University of Technology,
Faculty of Advanced Technologies and Chemistry, Warsaw, Poland
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