Interaction of single variant martensitic transformation with small γ type precipitates in CuZnAl

Superelasticity and fatigue in oligocrystalline shape memory alloy microwires

“…An evolution of energy dissipation similar to Fig. 5 has been found in some SMAs under different physical conditions, for example, when a non-transforming second phase has been introduced in Cu-Zn-Al single crystals [37][38][39], or in polycrystalline Ni-Ti [40][41][42][43][44]. In these studies, steady-state energy dissipation was found to develop after ~5-40 cycles [37,38,[42][43][44] which agrees well with Fig.…”

Effect of γ2-phase precipitates on the martensitic transformation of a β-CuAlBe shape memory alloy

“…5a). The other one shows dislocation bundles in the b matrix closer to the interface which are typically observed after stressinduced PE cycles in Cu-Zn-Al alloys with nanometric cuboidal precipitates [5,9] (Fig. 5b).…”

“…It has been recently shown that these alloys, with 23 at% Al, show a hypereutectoid behavior for Be content higher than around 2.9 at%, with g 2 as the first formed phase under slow cooling from high temperature [4]. Their influence on the MT in Cu-based SMA has been extensively studied, mostly in Cu-Zn-Al [5][6][7][8][9], and Cu-Al-Ni alloys [10][11][12]. However, a detailed analysis of the MT of Cu-Al-Be alloys with g 2 precipitates has not been reported to date.…”

X-Ray Diffraction Effects Given by the Austenitic Phase During the Training Process of Shape Memory Cu-Zn-Al Polycrystals

“…A quite similar conclusion has been suggested by Stalmans et al [5] who have shown that the crystallographically equivalent transformation variants are not thermodynamically equivalent. If single crystals contain precipitates Lovey et al [6] have shown that during the training process dislocations are generated by these precipitates and this dislocation-precipitates association develops internal stresses in the direction which should favour the trained transformation variant. The role of the local martensite plates retained above Af [7] on the TWME origin is not preponderant [8].…”