文献类型：期刊文献

中文题名：超超临界汽轮机转子X12CrMoWVNbB10-1-1钢棘轮效应的试验研究

英文题名：Experimental Study on Ratchet Effect of Steel X12CrMoWVNbB10-1-1 for USC Steam Turbine Rotors

作者：赵鹏[1];轩福贞[1];涂善东[1]

机构：[1]华东理工大学承压系统安全科学教育部重点实验室,上海200237

年份：2010

卷号：30

期号：4

起止页码：309

中文期刊名：动力工程学报

外文期刊名：Journal of Chinese Society of Power Engineering

收录：CSTPCD;;Scopus;北大核心:【北大核心2008】；CSCD:【CSCD2011_2012】；

基金：上海博士后基金资助项目(09R21411800)

语种：中文

中文关键词：超超临界汽轮机转子;棘轮效应;蠕变;高温部件;寿命评估

外文关键词：USC steam turbine rotor; ratchet effect; creep; high-temperature component; life estimation

摘要：以超超临界汽轮机转子材料X12Cr Mo WVNbB10-1-1钢为对象,研究了在蠕变疲劳载荷下该材料的棘轮效应,探讨了在高温环境下不同峰值保持时间对棘轮效应的影响以及蠕变和棘轮之间的交互作用,并分析了棘轮效应的存在对寿命评估的影响.结果表明:保持时间会影响纯交变载荷下产生的非弹性应变循环累积εR1,在较低保持时间时,εR1不会出现安定现象,从而抑制了保持时间段内产生的蠕变应变循环累积εR2的演化;εR2对材料寿命的影响可以归类为与时间有关的蠕变损伤;提出采用εR1和循环塑性应变之和来度量棘轮应变εR1的损伤;针对不同的损伤机制,利用分区分析的方法可以进行精确的寿命评估.
Taking the steel X12CrMoWVNbB10-1-1 for ultra supercritical（USC） steam turbine rotors as the object of study,ratchet effect of the material was investigated under creepfatigue loading conditions,while influence of hold times on the ratcheting behavior and the creep-ratchet interaction at high temperatures discussed,and the influence of the ratchet effect on the creep-fatigue life analyzed.Results show that the cyclic accumulated inelastic strain ε_（R1） is dependent on hold time under pure cyclic loading conditions.The shakedown of ratcheting ε_（R1） will not occur when the hold time is relatively short,which would retard the evolution of the cyclic accumulated creep strain ε_（R2） within the hold time.The damage of ratcheting ε_（R2） can be contributed to the time-dependent creep.It is proposed that the damage of ratcheting ε_（R1） may be measured by the sum of strain ε_（R1） and cyclic plastic strain.It is believed that precise life estimation can be achieved by partition method for different damage mechanisms.