Materials with high functional and strength performance are finding wide range of applications. In this study, we propose an approach to enhance the synergistic relationship between recoverable strain and strength in TiNi shape memory alloys (SMAs) by utilizing cryogenic rolling. Comparative analysis of the rolled samples, which experienced a thickness reduction of up to 13% at a nitrogen temperature, revealed good cycling stability, greater recoverable strain, reduced modulus, and increased strength at room temperature when compared to their undeformed counterparts. Notably, these rolled samples exhibited a significant recoverable strain (>4%) and impressive strength (0.8∼1.6 GPa) over a wide temperature range (∼400 K). Our findings suggest that these enhancements can be attributed to the emergence of the B19′ strain glass transition. This research not only illuminates the potential advantages of cryogenic rolling in shaping the functional and structural properties of SMAs but also offers a promising avenue for effectively regulating properties.

具有高功能和强度性能的材料正在得到广泛的应用。在这项研究中，我们提出了一种利用低温轧制来增强 TiNi 形状记忆合金 (SMA) 的可恢复应变和强度之间的协同关系的方法。对轧制样品的比较分析显示，与未变形的样品相比，轧制样品在氮气温度下厚度减少了高达 13%，显示出良好的循环稳定性、更大的可恢复应变、更低的模量以及更高的室温强度。值得注意的是，这些轧制样品在较宽的温度范围（~400 K）内表现出显着的可恢复应变（>4%）和令人印象深刻的强度（0.8~1.6 GPa）。我们的研究结果表明，这些增强可归因于 B19' 应变玻璃化转变的出现。这项研究不仅阐明了低温滚动在塑造 SMA 功能和结构特性方面的潜在优势，而且还为有效调节特性提供了一条有前途的途径。