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

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试验（Small Punch, SP）对高温服役金属材料寿命预测适用性的研究论文。该技术尚未实现标准化，且其试验数据与常规蠕变试验所得数据的相关性尚存疑，因此亟需采用新近发布的《小冲杆试验实施规范》（CEN/WS 21）。本研究聚焦于探究P91钢焊接接头在600℃下的蠕变行为，以及其低温断裂行为。从含P91钢焊接接头的构件不同区域制备了直径8mm、厚度0.5mm的薄圆盘试样：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（Fine-grain Heat Affected Zone, FG-HAZ）与粗晶热影响区（Coarse-grain Heat Affected Zone, 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。研究表明，SP试验是表征该合金及其焊接接头蠕变行为的可靠方法；此外，通过有限元分析（Finite Element Analysis, FEA）验证了所推导的适用于寿命预测的蠕变模型，可准确预测SP圆盘试样的蠕变变形。此外，SP试验方法在评估P91钢焊接接头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与断裂韧性的估算。