Original scientific paper

Non-alloyed Ni₃Al based alloys – preparation and evaluation of mechanical properties

J. Malcharcziková ; RMSTC, Faculty of Metallurgy and Materials Engineering, VŠB-TU Ostrava, Czech Republic
F. Chmelík ; Department of Physics of Materials, Charles University in Prague, Czech Republic
J. Pešička ; Department of Physics of Materials, Charles University in Prague, Czech Republic
M. Kursa ; RMSTC, Faculty of Metallurgy and Materials Engineering, VŠB-TU Ostrava, Czech Republic
M. Pohludka ; RMSTC, Faculty of Metallurgy and Materials Engineering, VŠB-TU Ostrava, Czech Republic

Abstract

The paper reports on the fabrication and mechanical properties of Ni3Al based alloy, which represents the most frequently used basic composition of nickel based intermetallic alloys for high temperature applications. The structure of the alloy was controlled through directional solidification. The samples had a multi-phase microstructure. The directionally solidified specimens were subjected to tensile tests with concurrent measurement of acoustic emission (AE). The specimens exhibited considerable room temperature ductility before fracture. During tensile testing an intensive AE was observed.

Keywords

Ni₃Al based alloys; directional solidification; tensile test; acoustic emission; fracture

Hrčak ID:

95677

URI

https://hrcak.srce.hr/95677

Publication date:

1.7.2013.

Visits: 1.422 *