研究了Ｔｉ３Ａｌ和Ｔｉ３Ａｌ＋Ｎｂ两种金属间化合物在空气和蒸馏水中的低频（０．５Ｈｚ）疲劳行为．结果表明，水介质能降低这两种材料的腐蚀疲劳抗力．随应力比增加，腐蚀疲劳裂纹扩展速率亦增加，Ｋｍａｘ是该材料一介质体系的力学控制因子．Ｔｉ３Ａｌ＋Ｎｂ的腐蚀疲劳抗力高于Ｔｉ３Ａｌ．断口分析显示发生了沿α２相内滑移面的解理开裂（Ｒ＝０．１）或α２／β相界的相间开裂（Ｒ＝０．５）．
Studies were carried out of the low-frequency fatigue(0.5Hz) behaviour of Ti3Al and Ti3Al+Nb in air and distilled water.It is revealed that the fatigue resistance of the two intermetallics decreases in water. The corrosion fatigue crack growth rate increases with increasing stress ratios,in which Kmax is the mechanical controlling factor of this material-environment system.The corrosion fatigue resistance of Ti3Al+Nb is higher than that of Ti3Al.Fractographic analysis shows that the cracking occurs along cleavage planes of α2(R = 0.1) or along interphase boundaries ofα2/ β(R = 0.5).Correspondent: (XING Zhiqiang, associate professor, Division of Advanced Mechanics, Beijing PolytechnicUniversity, Beijing 100022)
参考文献
| [1] | |
| [2] | |
| [3] | |
| [4] | |
| [5] | |
| [6] | |
| [7] | |
| [8] | |
| [9] | |
| [10] | |
| [11] | |
| [12] | |
| [13] | |
| [14] | |
| [15] | FleischerRL,DimidukDM,LipsittHA．AnnuRevMaterSci,1989 |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%