海洋大气对TA15钛合金应力腐蚀影响研究  

Research on Influence of Marine Atmosphere on Stress Corrosion of TA15 Titanium Alloy

作　　者：朱玉琴[1,2] 苏艳[1,2] 舒畅[1,2] 罗来正[1,2] 

机构地区：[1]中国兵器工业第五九研究所,重庆400039 [2]重庆市环境腐蚀与防护工程技术研究中心,重庆400039

出　　处：《装备环境工程》2012年第2期85-88,共4页Equipment Environmental Engineering

基　　金：国防基础科研项目(D1020060943)

摘　　要：采用恒位移WOL试样测定KISCC的原理对已在海洋平台户外和海水飞溅区暴露2 a的TA15钛合金样及原始TA15钛合金样进行了应力腐蚀行为研究。探讨了TA15钛合金预制裂纹的条件,并用裂纹终止法测量应力腐蚀临界应力场强度因子,确立了应力场强度因子KISCC与裂纹瞬时扩展速率da/dt之间的联系,并绘制了lg(da/dt)-KI曲线。通过扫描电镜对试件断面进行了分析,对其断裂特征进行了描述。Stress corrosion cracking （SCC） behavior of TA15 titanium alloy before and after 2 years exposure in marine platform and marine splashing zone was studied using WOL specimen and static displacement method. The pre-cracking condition of TA15 titanium alloy was discussed. KISCC of the alloy was measured using cracking ending method, lg （da/dt）-K1 curves were plotted and the relationship between stress field intensity factors K, and velocity of crack propagation da/dt was discussed. The fracture surface was inspected using SEM and the fracture characteristics were discussed.

关 键 词：TA15钛合金 应力腐蚀 裂纹扩展 断面分析 

分 类 号：TG172.4[金属学及工艺—金属表面处理]