基于可靠度的LY12CZ铝合金预腐蚀剩余强度预测  

Reliability Based Prediction of LY12CZ Aluminum Alloy Residual Strength with Corrosion Damage

作　　者：李旭东[1] 刘治国[1] 贾明明[1] 穆志韬[1] 

机构地区：[1]海军航空工程学院青岛校区,青岛266041

出　　处：《环境技术》2013年第2期19-22,共4页Environmental Technology

摘　　要：按ASTM标准对常温下的LY12CZ铝合金进行预腐蚀。利用MTS 880试验机进行静拉伸试验,结果表明剩余强度随着腐蚀损伤程度加深逐步下降。文中建立了带有可靠度的剩余强度计算方法,并基于AFGROW软件建立了腐蚀坑的物理模型提出了剩余强度预测方法,这两种方法与实验结果吻合程度良好,具有工程应用参考价值。Specimens of LYI2CZ aluminum alloy are exposed in corrosive solution according to ASTM standard with the aim to create pits on specimen surface, which will be later measured to identify the number, the geometric size distribution of the pits by statistical analysis. Single direction tensile tests are conducted on corroded specimen, which proves that residual strength will decrease with corrosion damage increasing. This paper proposed the AFGROW based method to predict the residual strength based on the average pit parameters and maximum pit parameters based on the established physical model. Comparing with the experimental result, the proposed method is proved to be applicable for engineering practice.

关 键 词：腐蚀坑 腐蚀损伤 剩余强度 

分 类 号：TG171[金属学及工艺—金属表面处理] V252[金属学及工艺—金属学]