The interdependence of the thermal and mechanical cycling behaviour in Ti2448 (Ti–24Nb–4Zr–8Sn, wt%)

Understanding the Room Temperature Recovery Behavior in a Ti–24Nb–4Zr–8Sn Superelastic Alloy

“…An increase in σ SIM following mechanical deformation has been shown to be possible when heating to temperatures as low as 200 °C for very short periods of time, and complete recovery of the transformation behavior is possible following heating to 350 °C. [ 14 ] Both observations were reported to be due to the reduction in internal stresses following these heat treatments. [ 14 ]…”

“…[ 14 ] Both observations were reported to be due to the reduction in internal stresses following these heat treatments. [ 14 ]…”

“…However, more recently, it has been observed that the effects of repeated loading may not be permanent, with recovery in σ SIM reported following heating to temperatures where dislocations become mobile. [ 14 ] At these temperatures, the rearrangement of dislocation structures could help to accommodate their associated strain fields, in order to lower the overall energy, thus returning the microstructure to a condition more comparable to the unloaded specimen. [ 15 ] However, some recovery in σ SIM has also been seen after holding in ambient conditions and coincide with a decrease in the stable volume fraction of α″.…”