工程科学学报Issue(10)：1331-1337,7.DOI:10.13374/j.issn2095-9389.2015.10.012
基于直流电压降法的传热管疲劳裂纹扩展速率测量
Fatigue crack growth rate measurement of steam generator tubes based on DCPD method
摘要
Abstract
A new testing method based on direct current potential drop ( DCPD ) and pin loading tension ( PLT ) method was introduced for evaluating the fatigue crack growth rate of steam generator tubes. In analogy to compact tension ( CT) specimens, a testing model was established by using thin-walled tube specimens, and the corresponding mechanical and electrical finite element analyses were made respectively, which determined the data acquisition plan based on DCPD method. Fatigue test was taken on nick-el-based alloy 690 used for nuclear power steam generators, and the effects of applied load and temperature were discussed. The result was modeled with the Paris-Erdogan equation and accorded well with this model. Scanning electron microscopy ( SEM) examination of the fatigue fracture surfaces revealed transgranular attack, and the transgranular regions of the fatigue fracture surfaces were covered with striation-like features.关键词
镍铬铁合金/薄壁管/裂纹扩展速率/电压降法Key words
nickel chromium iron alloys/thin-walled tubes/crack growth rate/potential drop method分类
矿业与冶金引用本文复制引用
陈凯,杜东海,张乐福,徐雪莲,石秀强,孟凡江,鲍一晨,刘晓强..基于直流电压降法的传热管疲劳裂纹扩展速率测量[J].工程科学学报,2015,(10):1331-1337,7.基金项目
国家科技重大专项资助项目(2010ZX06004-018) （2010ZX06004-018）
