Pseudoelastic Behavior of Boron-Doped $$\beta_{1}$$-Type Cu-Al-Be Shape Memory Alloys

Experimental investigation of the pseudoelastic behavior on zirconium modified Cu–Al–Be shape memory alloys for seismic applications

“…Martensite phase (o) peaks of Zr 1 diffractogram, as depicted in figure 10, consists of several intersecting variants, viz., (2 0 2), (0 0 22), (2 0 12) and (2 4 8) reflections associated with different orientations of the stabilized β ′ 1 -phase, caused by mutual interactions of the martensite plates [62]. Besides, high intensities of the reflections indicated a more significant number of stabilized martensite plates remain permanently within the parent β 1phase [21,63].…”

“…Zr ⩾ 0.1 wt.%). This detrimental effect is due to blocking/pinning exerted by the precipitates [21,22,67], that provides obstacles to the formation of SIM, and also hampers the easy movements of austenite/martensite interfaces, i.e. β 1 ↔ β ′ 1 .…”

“…Based on the literature, it is observed that the addition of less-soluble elements viz., grain refiners (Zr, Ti, Cr, V and B) in Cu-Al-based SMAs reduces the grain size and also inhibits intergranular-brittle fracture, in turn, remarkable enhancement in the mechanical properties [18][19][20][21][22]. Among these, Zr acts as a very good grain refiner as well as grain growth rates are suppressed effectively.…”