蠕变-疲劳交互作用下P91钢变形行为研究进展
Advances in Deformation Behaviour of P91 Steel under Creep-Fatigue Interaction
王家璇 1李梦阳 2郑泽邦1
作者信息
- 1. 西北工业大学 材料学院 陕西省高性能精确塑性成形技术与装备重点实验室,陕西 西安 710072
- 2. 中国大唐集团科学技术研究院有限公司西北电力实验研究院,陕西 西安 710021
- 折叠
摘要
P91 钢被广泛应用于热电机组的蒸汽管道中.近年来,峰值负荷调节导致了管道部件的蠕变-疲劳相互作用,构件常出现早于预期寿命的失效.针对这一问题,本文综述了P91 钢在蠕变-疲劳交互作用下的力学响应、微观组织演化、裂纹萌生扩展规律三个方面的研究成果与进展.首先通过对比不同条件下蠕变-疲劳加载方式,论述了蠕变-疲劳变形过程中材料的微观组织演化规律.最后,根据载荷保持时间、加载频率、平均应力与应力幅的关系等外部服役条件的不同,阐述了P91 钢微裂纹的萌生、扩展行为.
Abstract
P91 steel is widely used in steam pipelines of thermal power units.In recent years,the peak-loading regulation leads to the creep-fatigue interaction of pipeline components,and the components often fail earlier than their life expectancy.In view of this problem,the research results and progress of P91 steel in mechanical response,microstructure evolution and crack initiation,propagation law under creep-fatigue interaction were reviewed.Firstly,by comparing the creep-fatigue loading methods under different conditions,the microstructure evolution law of the material in the process of the creep-fatigue deformation was discussed.Finally,the initiation and propagation behaviour of microcracks in P91 steel was expounded according to different external service conditions,such as load retention time,loading frequency,the relationship between average stress and stress amplitude.
关键词
蠕变-疲劳交互作用/P91钢/微观组织演化/裂纹萌生扩展行为Key words
creep-fatigue interaction/P91 steel/microstructure evolution/crack initiation and propagation behaviour引用本文复制引用
出版年
2024
NETL
NSTL
万方数据