Uniaxial creep test data for 13 CrMo 4 4 se material at 550 °C and a stress of 130 MPa (third repeat test)

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）在欧洲科学与技术合作组织（COST）501/II/WP5 C框架下，针对低合金钢开展试验所获得的单轴蠕变（uniaxial creep）、单轴拉伸（uniaxial tensile）及弹性模量（elastic modulus）测试结果。其中，COST 501第二轮第五工作包（Work Package 5，WP5）的研究主题为模拟服役载荷下的构件剩余寿命（residual lifetime）预测，而WP5 C子课题则聚焦于蒸汽管道用钢的相关研究。在WP5 C子课题的研究范畴内，研究人员针对13CrMo 4 4（1Cr0.5Mo0.25V）与14MoV 6 3（0.5Cr0.5Mo0.25V）两种钢的正火回火态（normalised and tempered）及经服役暴露状态，开展了蠕变断裂试验（creep rupture testing）。两种钢的服役暴露条件分别为：13CrMo 4 4钢在525℃下服役250000小时，14MoV 6 3钢在530℃下服役116000小时（原文此处标注为14MoV 4 4，疑似笔误，保留原始表述）。本数据集的研究目标有二：一是为上述钢种提供基础蠕变断裂数据；二是制备一系列带有既定蠕变应变量（creep strain）的试样，用于蠕变损伤（creep damage）的无损分析（non-destructive analysis）。短时试验结果显示，新态材料的强度显著高于经服役暴露的材料。随着试验时长的增加，新态与经服役暴露材料的断裂强度（rupture strengths）逐渐趋于一致，这一现象源于两者均形成了稳定的微观组织（microstructures）。针对13CrMoV 4 4钢，其蠕变损伤的演化规律取决于初始状态：新态材料在约1%的较低蠕变应变下即出现蠕变孔洞形成现象，而经服役暴露的试样在10000小时的试验后未观察到空穴产生。对于14MoV 6 3钢，在新态与经服役暴露材料的短时试验中均检测到了蠕变损伤。