摘要
采用薄壁管材试样,对f9.50.57mm规格的2种新型锆合金管材进行了5个应变水平下的低周疲劳实验,且对其中的两个应变水平做了统计分析。对实验数据处理后,得到了管材的Det-N关系曲线和疲劳拟合曲线方程。并对管材在不同应变水平的低周疲劳断口做了金相和SEM分析,讨论了新型锆合金薄壁管材的低周疲劳断裂机理。
Fatigue crack of materials induces very large calamity because of its abruptness. According to literature researches, fatigue destroy hold 80-90% in all of mechanical invalidation. We adopt three kinds of φ 9.5×0.57 mm thin-wall tube samples, and finish low cycle fatigue test at 5 kinds of strain levels. We get the relationships of ΔΕt-N and fatigue imitation function. Furthermore, the fatigue crack microstructure is analyzed and the mechanism of fatigue is discussed.
出处
《核动力工程》
EI
CAS
CSCD
北大核心
2004年第2期133-136,共4页
Nuclear Power Engineering
关键词
疲劳
锆合金
低周疲劳
Cracks
Fatigue of materials
Fatigue testing
Metallographic microstructure
Scanning electron microscopy
Strain
