AgCl-induced hot salt stress corrosion cracking in a titanium alloy
AgCl-induced hot salt stress corrosion cracking in a titanium alloy
复制标题
DOI：
10.1016/j.corsci.2021.109497
复制
发表时间：
2021-05-03
影响因子：
8.3
通讯作者：
Dye, David
中科院分区：
文献类型：
--
作者：
Shi, Yitong;Joseph, Sudha;Dye, David
研究了agcl诱导Ti-6246在500 MPa、380℃、24h下应力腐蚀开裂的机理。扫描电镜（SEM）和扫描电镜（STEM-EDX）分析表明，金属银沿裂纹形成并迁移。TEM分析还发现，TiO2中混入了SnO2和Al2O3腐蚀产物。断口表面呈穿晶性质，在初级α相呈脆性。长，直和非相互作用的位错观察到脆性外观断裂的初级α晶粒，具有基部和锥体痕迹。这与裂纹机制的位错发射观点一致。
The mechanism of AgCl-induced stress corrosion cracking of Ti-6246 was examined at 500 MPa and 380 degrees C for 24 h exposures. SEM and STEM-EDX examination of a FIB-sectioned blister and crack showed that metallic Ag was formed and migrated along the crack. TEM analysis also revealed the presence of SnO2 and Al2O3 corrosion products mixed into TiO2. The fracture surface has a transgranular nature with a brittle appearance in the primary alpha phase. Long, straight and non-interacting dislocations were observed in a brittle appearance fractured primary alpha grain, with basal and pyramidal traces. This is consistent with a dislocation emission view of the cracking mechanism.