摘要
评价了钛合金Ti-4Al-2V棒材的室温高周疲劳性能。采用旋转弯曲的加载方式完成了Ti-4Al-2V棒材在室温空气中的成组常规疲劳试验和升降法试验，对试验数据进行了分析，绘制了S-V曲线和P-S-N曲线，对疲劳断口进行了扫描电子显微镜（SEM）分析。结果表明，钛合金Ti-4Al-2V棒材的疲劳极限α1（10）^7与经验公式计算值吻合，Ti-4Al-2V棒材具有较好的抗高周疲劳的性能，疲劳断口呈现裂纹萌生、扩展和断裂的特征。
The high cycle fatigue behavior of titanium alloy Ti-4Al-2V rods at room temperature was evaluated. The common high cycle fatigue （HCF） tests with group specimen and the up-and-down tests were performed under bending and rotating loadings at room temperature in air environment. The experimental data were analyzed and the S-N curve and P-S-N curve were plotted, and the fracture morphology is analyzed by SEM. The results show that Ti-4Al-2V rods have good resistance to high cycle fatigue and the value of α1（10）^7 is about the same with that of the corresponding equatiori. The fracture morphology ＇of Ti-4Al-2V specimen after fatigue failure presents typical characteristics with three areas of fatigue crack initiation, growth＇ and rupture.
出处
《核动力工程》
EI
CAS
CSCD
北大核心
2010年第4期114-117,共4页
Nuclear Power Engineering
