Experimental investigation of a Portevin-Le Chatelier band in Ni‒Co-based superalloys in relation to γʹ precipitates at 500 ℃

Yanke Liu^a, Yulong Cai^a, Chenggang Tian^b, Guoliang Zhang^b, Guoming Han^c, Shihua Fu^a^,^d, Chuanyong Cui^b^,^*(

), Qingchuan Zhang^a^,^*(

)

Fig. 7.. DIC strain maps of 5% and 30 % γ′ alloys at different stages of loading: (a), (c), and (e) correspond to the 5% γ′ content alloy at 0.1, 0.2, and 0.4, respectively; (b) and (d) correspond to the 30 % γ′ content alloy at 0.1 and 0.2, respectively; (f) shows the corresponding strain distribution. The three red points (P1, P2, P3) in (a) and (b) are used in the analysis of the local strain rate evolutions shown in Fig. 9.