研究了Zr41.2Ti13.8Ni10Cu12.5Be22.5块状非晶在充氢过程中氢致滞后断裂规律以及氢鼓泡的形核、长大及破裂过程.结果表明,当充氢电流i<20 mA/cm2时,不出现氢损伤(鼓泡及微裂纹),但在恒载荷条件下能发生氢致滞后断裂,其归一化门槛应力强度因子为KIH/KIC=0.63.当i≥20 mA/cm2后,无载荷下充氢会产生氢损伤,恒载荷下发生滞后断裂时KIH/KIC从0.63降为0.26.氢鼓泡(直径约为30 nm)形核时的内压pi≈3.6 GPa.随氢的进入,鼓泡不断长大;内压增大至pC≈3.9 GPa时,鼓泡就会解理扩展变成裂纹;但扩展20-30μm后,内压下降从而止裂.当一定量原子氢进入氢鼓泡后,它又能解理扩展,从而在鼓泡边缘局部解理断口上可以观察到止裂线.
参考文献
[1] | Viswanadham R K, Green J A S, Montague W G. Scr Metall, 1976, 10:229 |
[2] | Kawashina A, Hashimoto K. Scr Metall, 1980, 14:41 |
[3] | Ashock S, Stoloff N S, Glicksman M E, Slavin T. Scr Metall, 1981, 15:331 |
[4] | Tong H S, Macur J E. Corrosion, 1982, 38:464 |
[5] | Schroeder H W, Koster U. J Non-Cryst Solids, 1983, 56:213 |
[6] | Namboodhiri T K, Ramesh T A, Singh G, Seghal S. Mater Sci Eng, 1983, 61:23 |
[7] | Flis J, Ashok S, Stoloff N S , Duguette D S. Acta Metall,1987, 56:2071 |
[8] | Lin J J, Perng T P. J Mater Sci Lett, 1991, 10:1443 |
[9] | Lin J J, Perng T P. Metall Mater Trans, 1995, 26A: 197 |
[10] | Elaiz N, Eliezer D. Adv Perform Mater, 1999, 6:5 |
[11] | Duh D, Dauskardt R H. Scr Mater, 2000, 42:233 |
[12] | Duh D, Asoka-kumar P, Dauskardt R H. Acta Mater,2002, 50:537 |
[13] | Guo J X, Li J X, Qiao L J, Gao K W, Chu W Y. Corros Sci, 2003, 45:735 |
[14] | Chu W Y, Gao K W, Huang C H, Wang Y B, Qiao L J.Corrosion, 2000, 56:1046 |
[15] | Pan C, Su Y J, Chu W Y, Li Z B, Liang D T, Qiao L J.Corros Sci, 2002, 44:1983 |
[16] | Chu W Y, Qiao L J, Chen Q Z, Gao K W. Fracture and Environmental Fracture. Beijing: Science Press, 2000:120(褚武扬,乔利杰,陈奇志,高克玮.断裂与环境断裂.北京:科学出版社,2000:120) |
[17] | Lin L C. Acta Metall, 1987, 35:1663 |
[18] | Floris K M, Dauskardt R H. Acta Mater, 2001, 49, 2547 |
[19] | Huang Y J. Amorphous Magnetic Physics and Materials.Xi'an: University of Electronic Science and Technology Press, 1991:85(黄永杰.非晶态磁性物理与材料.西安:电子科技大学出版社1991: 85) |
[20] | Rooke D P, Cartwright D. J Compendium of Stress Intensity Factors. London: Her Majesty's Stationary Office,1976:274 |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分:
-
10%
-
20%
-
30%
-
40%
-
50%