在应力作用下对带有涂层的高强度铝合金构件在3.5% NaCl溶液中腐蚀疲劳断口进行了研究。结果表明：在腐蚀条件下高强度铝合金构件断口上不仅出现疲劳辉纹，还出现准解理、解理、沿晶等断裂特征，腐蚀疲劳过程属于阳极溶解机制控制。失效形式为多裂纹断裂，在各个铆孔处均有裂纹萌生，其中有一处为主裂纹，其位置不固定，主裂纹扩展距离较长，最后与其它裂纹汇合，最终导致疲劳断裂。
The fractography of high strength aluminum alloy LY12CZ riveted specimen with coating was investi?鄄gated after corrosion fatigue tests under stress in 3.5% NaCl solution. Fracture features like fatigue striation， dimple， cleavage， and intergranular fracture were observed. The corrosion fatigue mechanism was controlled by anodic dissolution. The failure mode was multi-crack fracture. Cracks were initiated from every rivet holes. The principal crack with longer propagation length and varying positions finally converged with other cracks and led to fatigue fracture.
参考文献
| [1] |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%