文献类型：期刊文献

英文题名：Evaluation of residual creep life of steels using macro-pillar creep testing and Omega method

作者：Zhang, Xiaocheng[1];Chen, Guoyao[1];Wang, Wulin[1];Zhong, Jiru[1];Wang, Qiongqi[1];Xu, Tong[2];Guan, Kaishu[1]

机构：[1]East China Univ Sci & Technol, Sch Mech & Power Engn, Key Lab Pressure Syst & Safety, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]China Special Equipment Inspect & Res Inst, ShunQiang Rd 1, Beijing 100013, Peoples R China

年份：2021

卷号：174

外文期刊名：MEASUREMENT

收录：;EI(收录号：20210309775087);WOS:【SCI-EXPANDED(收录号:WOS:000634796100006)】；

基金：The authors of this paper would like to express their acknowledgement to National Key R&D program of China (2018YFC0808800) for the funding.

语种：英文

外文关键词：Indentation; Pillar; Omega method; Creep life

摘要：Residual creep life evaluation is an essential part of Fitness-For-Service (FFS) assessment for engineering components operating at elevated temperatures. This paper elaborates a new evaluation approach based on macropillar compression testing (MPCT) and Omega method. The MPCT creep test was performed at the same stress level as the tensile creep test by adjusting the testing load using an algorithm, which is also provided in this paper. The barreling effect of MPCT creep test was corrected by two proposed parameters, which were calibrated using finite element method with 6 types of Cr-Mo alloys from API 579. Finally, a 1.25Cr-0.5Mo-Si steel was prepared for both MPCT and round bar tensile creep tests at 550 ? and different initial stress levels. The predicted residual creep life by MPCT has an error of 2.2% at 140 MPa, 6.4% at 160 MPa and 13.5% at 180 MPa.