Creep Tests and Modeling Based on Continuum Damage Mechanics for T91 and T92 Steels

[摘要] 9-11%Cr ferritic steels play an important role in high-temperature and high-pressure boilers of advanced power plants. In this paper, a continuum damage mechanics (CDM)-based creep model was proposed to study the creep behavior of T91 and T92 steels at high temperatures. Long-time creep tests were performed for both steels under different conditions. The creep rupture data and creep curves obtained from creep tests were captured well by theoretical calculation based on the CDM model over a long creep time. It is shown that the developed model is able to predict creep data for the two ferritic steels accurately up to tens of thousands of hours.

[发布机构] Jiaxing Special Equipment Inspection Institute, Jiaxing; 314051, China^1;Shanghai Jiao Tong University, Shanghai; 200240, China^2;China Special Equipment Inspection and Research Institute, Beijing; 100029, China^3;China Jiliang University, Hangzhou; 310018, China^4

[效力级别] 机械制造 [学科分类] 材料科学（综合）

[关键词] Creep behaviors;Creep curves;Creep-rupture data;Developed model;High temperature;High temperature and high pressure;Model-based OPC;Theoretical calculations