摘要
采取径向应变控制法,用MTS对φ14×2.0的Ti-Al-Zr钛合金管材在350℃下进行了不同应变量的高温低周疲劳性能试验。将试验数据按Coffin-Manson公式拟合成疲劳曲线方程,并对%0.1=Dte和1.5%下的试验数据按双参数Weibull分布函数进行了统计处理。对各样品的高温低周疲劳断口作了SEM分析和断口附近的组织进行了金相分析后得出了该种钛合金管材的高温低周疲劳机理。
The high temperature and low cycle fatigue behaviors test with different strains at 350°C of Φ14 × 2.0 mm Ti-Al-Zr titanium alloy tube was conducted by controlling the radial strain on MTS (material test system). The fatigue equation was obtained from the experimental data according to Coffin-Manson formula. The experimental data of ΔΕt=1.0% and ΔΕt=1.5% was statistically analyzed by using Weibull distribution function with double parameters. Finally, this paper analyzed the fatigue fracture of every sample by SEM (Scanning Electronic Microscope) and the microstructure nearby fracture by metallographic microoscope. It gives the mechanism of high temperature and low cycle fatigue for this titanium alloy tubes.
出处
《核动力工程》
EI
CAS
CSCD
北大核心
2003年第4期307-311,331,共6页
Nuclear Power Engineering
关键词
钛合金
高温低周疲劳
疲劳断裂
机理
Fatigue of materials
Fracture
Scanning electron microscopy
Statistical methods
Strain
Tubes (components)
