采用3.5%NaC1溶液中预制裂纹的方法测试了2124高强铝合金的应力腐蚀裂纹扩展长度随时间的变化,获得了裂纹扩展速率随腐蚀时间的变换规律及应力腐蚀断裂韧性界限值,并对断口进行分析.根据裂纹扩展的基本规律,运用灰色理论GM(1,1)模型,依据2124铝合金应力腐蚀开裂裂纹扩展长度的原始数据进行了灰色预测,并对预测结果进行检验.结果表明:裂纹扩展速度随腐蚀时间的延长而逐渐降低,断口呈沿晶断裂,腐蚀产物堆积导致了裂纹的继续扩展,建立的应力腐蚀开裂裂纹预测模型GM(1,1)的MATLAB程序,与实测数据相比,误差较小,具有一定的实用价值.为减少实验时间、快速、科学评价材料的应力腐蚀开裂敏感性提供科学依据.
参考文献
| [1] | FILATOV Y A;YELAGIN V I;ZAKHAROV V V .New Al-Mg-Sc alloys[J].Materials Science and Engineering A:Structural Materials Properties Microstructure and Processing,2000,280:97-101. |
| [2] | 陶斌武,王克然,刘建华,李松梅.Sc对Al-6Mg-Zr铝合金在模拟海水中耐蚀性能的影响研究[J].稀有金属材料与工程,2005(09):1485-1488. |
| [3] | Jing-Chie Lin;Hsueh-Lung Liao;Wern-Dare Jehng;Chih-Horng Chang;Sheng-Long Lee .Effect of heat treatments on the tensile strength and SCC-resistance of AA7050 in an alkaline saline solution[J].Corrosion Science: The Journal on Environmental Degradation of Materials and its Control,2006(10):3139-3156. |
| [4] | J. Sanchez;J. Fullea;C. Andrade;C. Alonso .Stress corrosion cracking mechanism of prestressing steels in bicarbonate solutions[J].Corrosion Science: The Journal on Environmental Degradation of Materials and its Control,2007(11):4069-4080. |
| [5] | 魏群义,彭晓东,谢卫东,刘江,刘相果.超高强度铝合金的应力腐蚀开裂[J].机械工程材料,2003(06):8-10. |
| [6] | Xiaodong Liu;G.S. Frankel;B. Zoofan;S.I. Rokhlin .In-situ observation of intergranular stress corrosion cracking in AA2024-T3 under constant load conditions[J].Corrosion Science,2007(1):139-148. |
| [7] | Zhanpeng Lu;Tetsuo Shoji;Yoichi Takeda;Yuzuru Ito;Seiya Yamazaki .The dependency of the crack growth rate on the loading pattern and temperature in stress corrosion cracking of strain-hardened 316L stainless steels in a simulated BWR environment[J].Corrosion Science: The Journal on Environmental Degradation of Materials and its Control,2008(3):698-712. |
| [8] | 徐晖,谢正文,孔凡玉.疲劳裂纹扩展预测模型及其应用[J].中国计量学院学报,2008(03):229-232. |
| [9] | 刘延利,钟群鹏,王宇魁.铝合金预腐蚀与疲劳性能灰色模型研究[J].北京航空航天大学学报,2001(02):129-132. |
| [10] | 王海涛,韩恩厚,柯伟.碳钢、低合金钢大气腐蚀的灰色模型预测及灰色关联分析[J].腐蚀科学与防护技术,2006(04):278-280. |
| [11] | 刘武,季寿红,兰志林,谷雪琴,周裕鑫.灰色GM（1,1）模型在管道腐蚀预测中的应用[J].管道技术与设备,2008(05):52-53,56. |
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%