Computational Study of Residual Stress Development and Dimensional Deviations in LPBF-fabricated Ti-6Al-4V TPMS Lattice Structures

The dataset supports a combined experimental–numerical study of LPBF-fabricated Ti-6Al-4V TPMS lattice structures (gyroid, Schwarz diamond, and Schwarz primitive) at 20% relative density, built at 0°, 30°, and 45° orientations in as-printed and heat-treated (670 °C, 4.5 h) conditions. It comprises thermomechanically coupled finite element predictions of residual stress and surface deviation; experimental validation data from 3D optical scanning (dimensional deviation) and XRD–Williamson–Hall analysis (microstrain and residual stress trends); areal surface roughness measurements (Sa, Sq); quasi-static compression results (stress–displacement curves, peak strength, and energy absorption); and SEM images of failure morphology. Together these data characterise the coupled effects of topology, build orientation, and stress-relief heat treatment on manufacturability, dimensional accuracy, surface integrity, and compressive performance.本数据集支撑针对相对密度为20%的激光粉末床熔融（Laser Powder Bed Fusion, LPBF）制备的Ti-6Al-4V三周期极小曲面（Triply Periodic Minimal Surfaces, TPMS）点阵结构（包括gyroid结构、施瓦茨钻石（Schwarz diamond）结构以及施瓦茨原始（Schwarz primitive）结构）的实验-数值联合研究，该类结构分别以0°、30°、45°的成型取向制造，涵盖打印态及去应力热处理（670℃，保温4.5小时）两种状态。 该数据集包含以下内容：热力耦合有限元预测的残余应力与表面偏差数据；来自三维光学扫描（尺寸偏差）及X射线衍射-威廉姆森-霍尔（XRD–Williamson–Hall）分析（微应变与残余应力变化趋势）的实验验证数据；面域表面粗糙度测量数据（Sa、Sq）；准静态压缩试验结果（应力-位移曲线、峰值强度与吸能能力）；以及失效形貌的扫描电子显微镜（Scanning Electron Microscope, SEM）图像。 上述所有数据共同表征了拓扑结构、成型取向以及去应力热处理对可制造性、尺寸精度、表面完整性与压缩性能的耦合影响。