Open Access
Review

Table 4

Summary of flow stress behaviour of hot deformed refractory high entropy alloys.

Alloy composition Strain rate
(s−1)
Strain Temp.
(°C)
Findings References
AlNb2TiV 10−3 0.33 600, 800 and 1000 An increase in temperature leads to a decrease in yield stress, initially slowly at 600 and 800 °C, and then rapidly at 1000 °C. Softening with steady flow was observed indicating the occurrence of dynamic recovery. [80]
AlNbTi3VZr1.5 10−3 to 1 1100,1150, 1200,1250 All the flow stress softens, signifying the occurrence of DRX. [71]
ZrTiHfNb0.5Ta0.5 10−3 0.5 700, 800 and 900 The stress increased rapidly and then decreased to a stable value with an increase in deformation. [81]
WReTaMo 10−3 0.25 1600 At 1600 °C, the WReTaMo alloy shows continuous strengthening without peak stress until the final testing point at strain of 25%. [82]
Nb40Ti25Al15V10Ta5Hf3W2 10−3 0.69 800, 900 and 1000 Samples deformed at 800 °C show strain hardening. Samples deformed at 900 °C and 1000 °C show persistent softening after yielding which signifies dynamic recovery and dynamic recrystallization. [41]
Nb30Mo30Hf20Co20 10−4 0.6 600, 800 and 1000 Steep and delayed strain hardening stage was observed in the flow stress curves at 22 °C and 600 °C. Softening with steady-flow stages was observed at 1000 °C, signifying dynamic recovery. [83]
CxHf0.25NbTaW0.5 1−3 1000, 1200 and 1400 A continuous hardening after the yield was observed in all the specimens. As the temperature increased, the steady-state stress appeared at lower strain values. [84]
TaNbHfZrTi 10−5 to 10−1 750 Deformation strengthening occurred and the flow stress increased continuously with an increase in the plastic strain at high-strain rates [50]
TixZrVNb 10−3 600 and 800 At 800°C, the strengths of the alloys significantly decreased. Furthermore, a serrated curve was also observed at 800 °C due to the alternating softening deformation and recrystallization [85]
HfMoNbTaTi 10−2 0.8 800, 1000 and 1200 A continuous drop in the flow stress started at the peak stress (strain = 0.027), proceeded by a steady-state flow stage from a strain of 0.8. Dynamic recrystallization behaviour was observed during compression at 1200 °C. [86]
NbCrMo0.5Ta0.5TiZr 10−3 800, 1000 and 1200 At 1000 °C, dynamic recrystallization of the alloy occurs after a short stage of strain hardening. At 1200 °C, further decrease in the flow stress, followed by weak softening and a steady state flow (dynamic recovery). [52]
HfMoNbTaTiZr 10−3 800, 1000 and 1200 At 800 °C, work hardening occurred. At 1000 °C and 1200 °C, dynamic recrystallization occurred. [87]

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.