Small punch creep test data for P91 haz_fg material at 600 °C and a load of 217 N

The data relate to a thesis concerned with demonstrating the suitability of Small Punch (SP) testing for lifetime prediction of metallic materials operating at high temperatures. The lack of standardisation of this technique and doubts about the correlation of the data with that obtained from conventional creep tests, supports the need to exploit the recently launched Code of Practice for Small Punch Testing (CEN/WS 21). The present work is specifically concerned with investigating the creep behaviour of P91 steel weldments at 600 Celsius along with low-temperature fracture behaviour. Thin discs, 8 mm in diameter and 0.5 mm thick, were manufactured from different zones of a component containing a P91 welded joint: base metal (BM), service- exposed material (SE), weld metal (WM), fine-grain and coarse-grain heat affected zones (FG-HAZ & CG-HAZ). The results of SP creep tests on these disks, performed at 600 Celsius under different loads carefully following the Code of Practice, could be correlated with uniaxial creep data. The SP test is shown to be a reliable method to depict creep behaviour of this alloy and its weldments and a creep model derived, useful for life time prediction, could also be demonstrated through FEA to predict the creep deformation of the SP discs. Additionally, the SP testing method shows potential to evaluate the fracture properties of P91 weldments, in particular the ductile-to-brittle transition temperature and fracture toughness estimations.

本数据集关联一项旨在验证小冲杆（Small Punch, SP）试验适配高温服役金属材料寿命预测的学位论文研究。该技术尚未实现标准化，且其测试数据与常规蠕变试验所得数据的关联性尚存争议，这凸显了推广新近发布的《小冲杆试验实施规范（Code of Practice for Small Punch Testing, CEN/WS 21）》的必要性。本研究聚焦于600℃工况下P91钢焊接件的蠕变行为与低温断裂行为的探究。研究人员从含P91焊接接头的构件的不同区域制取了直径8mm、厚度0.5mm的薄圆盘试样，涉及区域包括：母材（Base Metal, BM）、服役后材料（Service-Exposed Material, SE）、焊缝金属（Weld Metal, WM）、细晶热影响区与粗晶热影响区（FG-HAZ & CG-HAZ）。严格遵循该实施规范，在600℃、不同载荷条件下完成的上述圆盘试样SP蠕变试验结果，可与单轴蠕变试验数据建立关联。研究证实，SP试验可可靠表征该合金及其焊接件的蠕变行为；通过有限元分析（Finite Element Analysis, FEA）验证，所推导的适用于寿命预测的蠕变模型，同样可用于预测SP试样的蠕变变形。此外，SP试验方法在评估P91钢焊接件的断裂性能方面展现出应用潜力，尤其可用于韧脆转变温度测定与断裂韧性估算。