摘要
对 IC10定向凝固高温合金进行了 45 0～ 990℃热 /机械疲劳裂纹扩展行为的试验研究。分别研究了相位角、保持时间、温度、频率对 IC10合金裂纹扩展行为的影响 ,并建立了热 /机械疲劳裂纹扩展速率预测模型。研究发现 :温度的升高和频率的降低均会加速裂纹扩展 ;同相位热 /机械疲劳裂纹扩展速率大于反相位热 /机械疲劳裂纹扩展速率 ,而且它们两者介于最大温度和最小温度的等温疲劳裂纹扩展速率之间 ;
The experimental study about the behavior of thermal mechanical fatigue (TMF) crack growth were conducted in Ni 3Al intermetallic compound, which is candidate material for the heat components of high thrust weight aeronautical engine with thermal cycle of 450 to 990℃ It was investigated that the effects of phase angle, load hold, temperature and frequency on thermal mechanical fatigue crack growth rate in Ni 3Al superalloy, respectively The key results drawn from this study are as follows: Increasing temperature and decreasing frequency accelerate crack growth rate; The crack growth rate of in phase thermal mechanical fatigue is much larger than that of out phase thermal mechanical fatigue and both of them are between the crack growth rates of 450℃ isothermal and 990℃ isothermal tests; Load hold also accelerates crack growth
出处
《材料工程》
EI
CAS
CSCD
北大核心
2000年第11期13-14,共2页
Journal of Materials Engineering
