采用腐蚀疲劳试验方法,研究了LY12CZ铝合金在人工海水(3.5％NaCl溶液)中腐蚀疲劳裂纹的扩展规律,分析了载荷频率、应力比以及人工海水pH对裂纹扩展速率的影响,并借助扫描电镜对其断口形貌进行了观察.结果表明:随载荷频率、人工海水pH的降低,腐蚀疲劳裂纹扩展速率会显著加快,应力比则主要影响腐蚀疲劳近门槛值区的裂纹扩展;在中性人工海水中阳极溶解对裂纹加速扩展起主导作用;随人工海水pH的降低,裂尖氢置换反应加剧,裂尖材料氢损伤对裂纹扩展的加速效应逐渐显现.
参考文献
| [1] | SCHIJVE J .Fatigue of aircraft materials and structures[J].International Journal of Fatigue,1994,16(1):21-32. |
| [2] | Nicholas C.Bellingr;Jerzy P.Domorowski .Corrosion pillowing stresses in fuselage lap joints[J].AIAA journal,1997(2):317-320. |
| [3] | 刘晶晶,孙俊君,胡海云,邢修三.海洋腐蚀条件下材料环境失效的寿命预测[J].物理学报,2005(05):2414-2417. |
| [4] | RUIZ J;ELICES M .Environmental fatigue in a 7000 series aluminum alloy[J].Corrosion Science,1996,38:1815-1837. |
| [5] | 沈海军,吕国志.腐蚀疲劳裂纹扩展过程中裂尖阳极溶解的贡献[J].西北工业大学学报,2001(02):225-228. |
| [6] | ZHAO Wei-ming;XIN Ruo-fei;HE Zhi-rong et al.Contribution of anodic dissolution to the corrosion fatigue crack propagation of X80 steel in 3.5 wt.％ NaC1 solution[J].Corrosion Science,2012,63:387-392. |
| [7] | I.M.Robertson .The effect of hydrogen on dislocation dynamics[J].Engineering Fracture Mechanics,2001(6):671-692. |
| [8] | 王政富.阳极溶解及氢进入对裂纹尖端局部材料力学行为的作用[J].腐蚀科学与防护技术,1995(02):157. |
| [9] | MENAN F;HENAFF G .Influence of frequency and exposure to a saline solution on the corrosion fatigue crack propagation behavior of the aluminum alloy 2024[J].International Journal of Fatigue,2009,31(11/12):1684-1695. |
| [10] | Modelling the crack propagation rate for corrosion fatigue at high frequency of applied stress[J].Corrosion Science: The Journal on Environmental Degradation of Materials and its Control,2010(4):1115. |
| [11] | K. Sadananda;A. K. Vasudevan .Crack tip driving forces and crack growth representation under fatigue[J].International Journal of Fatigue,2004(1):39-47. |
| [12] | MURAKAMI R I;KIM Y H;FERGUSON W G .The effects of microstructure and fracture surface roughness on near threshold fatigue crack propagation characteristics of a two-phase cast stainless steel[J].FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES,1991,14(7):741-748. |
| [13] | FONTE M;ROMEIRO F;FREITAS M et al.The effect of microstructure and environment on fatigue crack propagation in 7049 aluminium alloy at negative stress ratios[J].International Journal of Fatigue,2003,25(9/11):1209-1216. |
| [14] | Kermanidis AT;Petroyiannis PV;Pantelakis SG .Fatigue and damage tolerance behaviour of corroded 2024 T351 aircraft aluminum alloy[J].Theoretical and Applied Fracture Mechanics,2005(1):121-132. |
| [15] | 穆志韬,李荻.LY12CZ铝合金型材构件腐蚀失效动力学规律研究[J].机械工程材料,2003(08):18-20. |
| [16] | 李鸿鹏,李锋,马康民,余治国.LY12CZ铝合金腐蚀疲劳研究进展[J].腐蚀科学与防护技术,2005(03):175-177. |
| [17] | 李旭东,穆志韬,刘治国,李玲.LY12CZ航空铝合金腐蚀疲劳断口研究[J].装备环境工程,2013(04):9-12,29. |
| [18] | Youhong Zhang,Xinlong Chang,Guozhi Lv,Hui Wang,Zhong Li,Yueliang Cheng.Corrosion fatigue behavior of fastening hole structure and virtual crack propagation tests[J].北京科技大学学报（英文版）,2008(05):585-589. |
| [19] | Wang Rong .A fracture model of corrosion fatigue crack propagation of aluminum alloys based on the material elements fracture ahead of a crack tip[J].International Journal of Fatigue,2008(8):1376-1386. |
| [20] | 张波;鲁自界;韩恩厚.频率对LY12 C Z铝合金在3.5％NaCk溶液中腐蚀疲劳裂纹扩展的影响[A].中国广州:[出版者不详],2000:310-313. |
| [21] | ASTM E647-00.In annual book of ASTM standards[S]. |
| [22] | GANGLOFF R P.Corrosion fatigue crack propagation in metals[M].USA:National Association of Corrosion Engineers,1989 |
| [23] | GB/T 20120.2-1998.金属与合金的腐蚀-腐蚀疲劳试验第2部分:预裂纹试样裂纹扩展试验试验[S]. |
| [24] | VASUDEVAN A K;SURESH S .Influence of corrosion deposits on near-threshold fatigue crack growth behavior in 2XXX and 7XXX series aluminum alloys[J].Metallurgical Transactions:A,1982,13:2271-2280. |
| [25] | 王政富.阳极溶解及氢进入对裂纹尖端局部材料力学行为的作用[J].腐蚀科学与防护技术,1995(02):157. |
| [26] | MENAN F;HENAFF G .Influence of frequency and exposure to a saline solution on the corrosion fatigue crack propagation behavior of the aluminum alloy 2024[J].International Journal of Fatigue,2009,31(11/12):1684-1695. |
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