The present work describes the preparation of near-full density Cu–Al–Ni shape memory alloy (SMA) strips via a novel processing route consisting of ‘spray deposition’ of atomised liquid Cu–Al–Ni alloy with a jet of argon gas followed by hot-rolling densification of the deposited preform. The subsequent homogenisation of the hot rolled Cu–Al–Ni strips resulted in complete martensitic structure in the finished strip, consisting of self-accommodated plates of β1′ and γ1′ martensites. The characteristic transformation temperatures and shape memory effects of Cu–Al–Ni strips were studied. It has been demonstrated that the Cu–Al–Ni SMA strips, prepared in the present work, resulted in relatively finer grain size with better combination of strength and ductility compared to other techniques based on conventional casting method.

中文翻译：

---

喷射沉积-热轧法制备Cu-Al-Ni形状记忆合金带材

目前的工作描述了通过一种新的工艺路线制备接近全密度的 Cu-Al-Ni 形状记忆合金 (SMA) 条带，该工艺路线包括雾化液体 Cu-Al-Ni 合金的“喷雾沉积”和氩气喷射。通过热轧致密化沉积的预制件。随后热轧 Cu-Al-Ni 带材的均质化导致成品带材中形成完整的马氏体结构，由 β1' 和 γ1' 马氏体自调节板组成。研究了 Cu-Al-Ni 带材的特征转变温度和形状记忆效应。已经证明，与基于传统铸造方法的其他技术相比，在本工作中制备的 Cu-Al-Ni SMA 带导致相对更细的晶粒尺寸以及更好的强度和延展性组合。