Efficient polishing of additive manufactured titanium alloys. Data

Additive manufactured parts presented in were developed at the Israel Aerospace Industries (IAI) and manufactured at The Israel Institute of Metals of the Technion using the process parameters recommended by the machine manufacture EOS, except the recommended "Stripe-width" which was doubled. The used machine was ALM EOS M290. The parts were developed for evaluation of surface treatment techniques via fatigue testing, thus 8 locations of the tensile stress concertation of Kt = 3.2 were introduced as highlighted in red in Fig. 3 in the main article. The part geometry enables: • Multiple load paths via branching / junctions. • Surface roughness conditions of a geometrically complex structure having relatively hidden radii surfaces. • Local differences (gradients) in the thermal mass. The mechanically weakest axis, i.e., z axis, of the parts is parallel to the part loading axis. In total 15 parts were plasma electrolytic polished (PeP), with 6 of them being particle blasted (PB) before PeP. The PeP conditions are given in PDF format. As-built, PeP and PB+PeP samples underwent same cyclical tensile loading testing in order to determine their fatigue resistance. It must be mentioned that the target results of the fatigue testing was successful 700 000 cycles. None of the tested surface treatment technologies could provide satisfactory results as noted in the main article. A photograph of as-built samples that failed the cyclical loading tests is given in JPG format. MMPDS data for Ti-6AL-4V Sheet configuration, Kt=3 and the reasons for using this data is presented in JPG format. Additionally, micrographs and surface roughness of the parts after after particle blasting is provided in JPG and PDF formats respectively.

本数据集所涉及的增材制造零件由以色列航空航天工业公司（Israel Aerospace Industries, IAI）研发，并在以色列理工学院以色列金属研究所完成制造；制造过程采用设备制造商EOS推荐的工艺参数，仅将推荐的“条纹宽度（Stripe-width）”参数翻倍。所用设备为ALM EOS M290型设备。本批零件的研发初衷为通过疲劳测试评估表面处理工艺，因此在主论文的图3中以红色标注出8处拉应力集中位置，其应力集中系数Kt=3.2。该零件几何结构具备以下特性：• 可通过分支/接头结构实现多载荷路径；• 可模拟具备相对隐蔽圆角曲面的几何复杂结构的表面粗糙度特征；• 可体现热质量的局部差异（梯度）。零件的力学薄弱轴（即z轴）与零件受载轴平行。总计15件零件采用等离子电解抛光（PeP）工艺处理，其中6件在PeP处理前先进行了喷砂（PB）预处理。等离子电解抛光的工艺参数以PDF格式提供。为测定其抗疲劳性能，对原始态（As-built）、PeP处理态以及PB+PeP复合处理态的样品开展了相同的循环拉伸加载测试。需说明的是，本次疲劳测试的预设达标目标为实现70万次循环加载无失效。如主论文所述，本次测试的所有表面处理工艺均未达到令人满意的测试结果。循环加载测试失效的原始态样品照片以JPG格式提供。针对Ti-6Al-4V板材构型、应力集中系数Kt=3的金属材料性能数据库（MMPDS）数据，以及采用该数据的原因说明均以JPG格式提供。此外，喷砂处理后零件的显微组织照片及表面粗糙度数据分别以JPG和PDF格式提供。