Uniaxial creep test data for 13 CrMo 4 4 material at 600 °C and a stress of 130 MPa

This data collection consists of uniaxial creep, uniaxial tensile, and elastic modulus results from tests performed on low-alloy steels at FZ Jülich in the scope of COST 501/II/WP5 C. With COST 501 Round II Work Package 5 concerned with the prediction of residual lifetime under simulated service loads, the WP5 C sub-package was focused on steam pipe steels.In the scope of the WP5 C sub-package, creep rupture testing of 13CrMo 4 4 (1Cr0.5Mo0.25V) and 14MoV 6 3 (0.5Cr0.5Mo0.25V) steels in new (normalised and tempered) and service exposed conditions was carried out. The service conditions were 250 000 h at 525°C for 13CrMo 4 4 and 116 000 h at 530°C for 14MoV 4 4. The aims were to provide basic creep rupture data for the steels and to provide a series of test pieces with defined amounts of creep strain for non-destructive analysis of creep damage.For the short duration tests, the new materials were significantly stronger than the service exposed materials. With increasing test time the rupture strengths of the new and the service exposed material converged as stable microstructures were established.For the 13CrMoV 4 4 steel, the creep damage developed depended on the initial condition; new material exhibited creep pore formation after relatively low creep strains around 1 % whereas in the service exposed condition no cavitation after 10 000 h was observed. For the 14MoV 6 3 steel, creep damage was found in short duration tests of both new and service exposed material.

本数据集收录了于利希研究中心（FZ Jülich）在COST 501/II/WP5 C框架下开展的低合金钢试验数据，包含单轴蠕变（uniaxial creep）、单轴拉伸（uniaxial tensile）及弹性模量（elastic modulus）测试结果。
COST 501第二轮工作计划第5工作组（COST 501 Round II Work Package 5）的研究主题为模拟服役载荷下的剩余寿命预测，其下设的WP5 C子工作组则聚焦于蒸汽管道用钢。
在WP5 C子工作组的研究框架内，研究人员针对13CrMo 4 4（1Cr0.5Mo0.25V）与14MoV 6 3（0.5Cr0.5Mo0.25V）两种钢开展了蠕变断裂试验（creep rupture testing），试验覆盖新态（正火回火态）与服役暴露工况两种初始状态。其中，13CrMo 4 4钢的服役暴露工况为525℃下服役250000小时，14MoV 4 4钢的服役暴露工况为530℃下服役116000小时。
本次试验的目标为：一是为两类钢提供基础蠕变断裂数据；二是制备一系列带有确定蠕变应变量的试样，用于蠕变损伤（creep damage）的无损分析（non-destructive analysis）。
短时长试验结果表明，新态材料的强度显著高于服役暴露态材料；随着试验时长增加，新态与服役暴露态材料的断裂强度逐渐趋同，最终形成稳定的显微组织。
对于13CrMoV 4 4钢，其蠕变损伤演化规律取决于初始状态：新态材料在蠕变应变约1%的较低水平下即出现蠕变孔洞；而服役暴露态材料在10000小时试验后未观察到蠕变空穴现象。
对于14MoV 6 3钢，新态与服役暴露态材料的短时长试验中均检测到蠕变损伤。