Small punch tensile/fracture test data for P91 wm material at 23 °C and a displacement rate of .003 mm/s

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.

本数据集与一篇学位论文相关，该论文旨在论证小冲杆（SP）试验在高温服役金属材料寿命预测中的适用性。由于该技术缺乏标准化，且其数据与传统蠕变试验数据的相关性存疑，因此有必要利用最新发布的《小冲杆试验操作规范》（CEN/WS 21）。本研究具体聚焦于P91钢焊件在600摄氏度下的蠕变行为及低温断裂行为的探究。研究从含P91焊接接头构件的不同区域制备薄圆盘（直径8mm、厚度0.5mm），包括母材（BM）、服役暴露材料（SE）、焊缝金属（WM）、细晶及粗晶热影响区（FG-HAZ与CG-HAZ）。严格遵循操作规范，在600摄氏度不同载荷下对这些圆盘进行SP蠕变试验，其结果可与单轴蠕变数据相关联。研究表明，SP试验是表征该合金及其焊件蠕变行为的可靠方法；此外，通过有限元分析（FEA）可验证所推导的寿命预测用蠕变模型，以预测SP圆盘的蠕变变形。另外，SP试验方法在评估P91焊件断裂性能方面具有潜力，尤其是韧脆转变温度与断裂韧性的估算。