Impressive tensile properties development of Ta0.5Nb0.5Hf0.5ZrTi1.5
future generation refractory high entropy alloy
Abstract
The microstructure, texture, phase stability, and tensile properties of
annealed Ta0.5Nb0.5Hf0.5ZrTi1.5 alloy have been investigated in the
present research. The alloy was severely hybrid-rolled up to 93.5%
thickness reduction, subsequently rolled samples subjected to an
annealing treatment at 800°C and 1000°C temperatures for 1h.
Consequently, the rolled condition and both annealed temperatures have a
body-centered cubic (BCC) structure. Furthermore, quantitative texture
measurements (ODF analysis) and microstructural examinations (analytical
EBSD maps) permitted to establish a good relationship between annealing
texture and microstructure and UTM utilized for obtaining the mechanical
properties. Impressive room temperature tensile properties combined with
the tensile strength (1380 MPa) and (24.7%) elongation achieved for the
800°C heat-treated condition. The evolution of the coarse microstructure
featured in the case of 1000°C annealed temperature ascribed to the
influence of high thermal energy.