Plasma electrolytic polishing of Nitinol parts

The data was obtained on two types of Nitinol samples. Namely on cold drawn Nitinol wires that are in martensite phase at room temperature and on cold rolled Nitinol plates that are in austenite phase at room temperature. The samples were plasma electrolytic polished (PeP) using the material-specific water-based salt solution as the electrolyte for a different amount of time. The main goal of this study was to determine whether and what kind of influence PeP has on the functionality of Nitinol parts. Thus, the change in chemical composition of Nitinol parts in as-received and polished conditions was analyzed using EDX and SEM technologies, the change in phase transformation temperature was determined by means of the DSC technique, the initial and final surface roughnesses were measured laser profiliometer. Finally, stress and strain characteristics were measured using universal testing machine. The full data analysis, the full methodology and data interpretation are presented in article "Plasma electrolytic polishing of Nitinol: Investigation of functional properties" (Navickaite et al (2021) Materials).本数据集采集自两类镍钛诺（Nitinol）样品：一类为室温下处于马氏体相的冷拉镍钛诺线材，另一类为室温下处于奥氏体相的冷轧镍钛诺板材。所有样品均采用适配该材料的水基盐溶液作为电解液，通过等离子电解抛光（Plasma Electrolytic Polishing，PeP）处理，处理时长各不相同。本研究的核心目标为探究等离子电解抛光是否会对镍钛诺部件的功能特性产生影响，以及具体的影响类型。为此，研究团队借助能量色散X射线光谱（Energy Dispersive X-ray Spectroscopy，EDX）与扫描电子显微镜（Scanning Electron Microscope，SEM）技术，分析了原始状态与抛光状态下镍钛诺部件的化学成分变化；通过差示扫描量热法（Differential Scanning Calorimetry，DSC）测定了其相变温度的变化；采用激光轮廓仪（laser profiliometer）测量了样品初始与最终的表面粗糙度；最后借助万能试验机（universal testing machine）测试了样品的应力与应变特性。完整的数据分析、实验方法与数据解读详见论文"Plasma electrolytic polishing of Nitinol: Investigation of functional properties"（Navickaite等人，2021年，《Materials》期刊）。