A novel approach for modifying aluminum powder EN AW-7075 with nanoparticles for additive manufacturing

1. General scope
This dataset forms the foundational experimental dataset investigating microstructural characteristics of TiC‑reinforced AA7075 aluminium matrix composites. The current release includes core characterization data supporting the first publication. Subsequent phases—containing extended analyses and additional conditions—are in progress and will be released in later companion datasets. The data establish a comprehensive baseline enabling future studies to build from this reference.
2. Dataset components
Chemical composition – OES: Quantitative chemical analysis of tested alloys measured by Optical Emission Spectroscopy (OES). Lists elemental concentrations (wt %) of AA7075 and TiC‑modified specimens, including mean values and standard deviations.
Relative density – LOM: Reports results of hot‑crack density (HC/cm²) and relative density (%) for modified TiC contents.
Grain characteristics – SEM/EBSD: Grain diameter (µm) and area (µm²) obtained through SEM and EBSD analysis, evidencing grain refinement for surface and volume modification.
Particle size distribution – PSD: Particle size distributions of powder modifications.
Microscopy image data – Figures 2, 3, 5, 6 and 7: Contains the original unprocessed microscopy images linked to the publication.
Figure 2: SEM images showing powder morphology of base 7075, TiC nanoparticles, and TiC‑modified powders
Figure 3: SEM/EDS element distribution mappings providing qualitative information.
Figure 5: Schematic and photographic view of the feedstock and PBF‑LB/M setup.
Figure 6: Light‑optical micrographs (LOM) of defect morphology in printed parts.
Figure 7: SEM/EBSD grain‑structure maps visualizing grain arrangement and orientation.
All images are provided as full‑frame TIFFs to ensure data authenticity and reproducibility.
3. Project context
The uploaded data define baseline results essential for later studies. Complementary datasets (e.g., calorimetry or mechanical tests) remain unpublished and will appear in future manuscripts. The shared data ensure reproducibility and transparency while maintaining the sequential release plan for further findings.
4. Data structure and repository information
Data types: Processed tables (CSV) and microscopy images (TIFF)
Measurement repetitions: Multiple replicates per condition
Analytical methods: OES, PSD, SEM/EDS/EBSD imaging, LOM‑based density
Future extensions: Additional mechanical, thermal, and microstructural data
5. Equipment and Institutional Acknowledgment
All analyses were performed using facilities of Paderborn University, specifically the Chair of Materials Science (Prof. Mirko Schaper) and the Direct Manufacturing Research Center (DMRC), whose technical infrastructure supported microscopy, diffraction, and particle analysis.

1. 研究范围
本数据集为探究TiC颗粒增强AA7075铝基复合材料微观结构特征的基础实验数据集。本次发布包含支撑首篇学术论文发表的核心表征数据；后续包含拓展分析与额外工况的数据集仍在研发中，将以配套数据集形式后续发布。本数据集构建了全面的基准数据，可为后续相关研究提供参考基础。
2. 数据集组成
化学成分（OES）：通过光发射光谱（Optical Emission Spectroscopy, OES）对受试合金进行定量化学成分分析，列出AA7075基体及TiC改性试样的元素浓度（质量百分比），包含均值与标准差。
相对密度（LOM）：报告了不同TiC添加量下的热裂纹密度（HC/cm²）与相对密度（%）测试结果。
晶粒特征（SEM/EBSD）：通过扫描电镜/电子背散射衍射（Scanning Electron Microscopy/Electron Backscatter Diffraction, SEM/EBSD）分析获得的晶粒直径（μm）与晶粒面积（μm²）数据，可验证表面与体积改性后的晶粒细化效果。
粒径分布（PSD）：通过粒径分布（Particle Size Distribution, PSD）分析得到的粉体改性后粒径分布数据。
显微图像数据：包含与论文关联的原始未处理显微图像，对应图2、3、5、6及7。
图2：扫描电镜图像，展示7075基体粉体、TiC纳米颗粒及TiC改性粉体的形貌
图3：扫描电镜/能谱（SEM/EDS）元素分布映射图，提供定性分析信息
图5：粉材与激光粉末床熔融（PBF-LB/M）制备装置的示意图与实物照片
图6：打印件缺陷形貌的光学显微镜（Light Optical Microscopy, LOM）图像
图7：可视化晶粒排布与取向的扫描电镜/电子背散射衍射（SEM/EBSD）晶粒结构图
所有图像均采用全画幅TIFF格式存储，以保障数据真实性与可重复性。
3. 项目背景
本次上传的数据集为后续研究提供了不可或缺的基准结果。配套数据集（如量热测试或力学性能测试数据）尚未公开，将在后续学术论文中发布。本次共享数据集旨在保障研究的可重复性与透明度，同时遵循后续研究成果的分批发布计划。
4. 数据结构与存储库信息
数据类型：处理后的表格文件（CSV）与显微图像文件（TIFF）
测量重复次数：每种工况均设置多组重复实验
分析方法：光发射光谱法、粒径分布分析、扫描电镜/能谱/电子背散射衍射成像、光学显微镜密度测试
未来拓展内容：新增力学、热学及微观结构相关数据
5. 设备与机构致谢
所有分析测试均在帕德博恩大学的相关设施中完成，具体包括材料科学教研室（Mirko Schaper教授团队）与直接制造研究中心（Direct Manufacturing Research Center, DMRC），其技术平台为显微成像、衍射分析与颗粒表征提供了支持。