摘要
为了获得氢在钛合金裂纹尖端的扩散行为,提出了一种力学与氢扩散的耦合模型。在COMSOL软件中建立了含单边椭圆裂纹的氢扩散模型,并分析了钛合金类型、载荷和裂纹长度对裂纹尖端氢扩散的影响。结果表明:在容易发生氢脆的环境中,α型钛合金的服役时间远大于β型钛合金;施加载荷对氢扩散有促进作用;裂纹长度与氢浓度成正比,与扩散区域的面积成反比。
In order to obtain the diffusion behavior of hydrogen at the crack tip of titanium alloys,a coupled model of mechanics and hydrogen diffusion was proposed.The hydrogen diffusion model with unilateral elliptical crack was established in COMSOL software.The influences of titanium alloy type,load and crack length on the hydrogen diffusion at the crack tip were analyzed.The results show that the service time ofα-type titanium alloy is much longer than that ofβ-type titanium alloy in the environment prone to hydrogen embrittlement.The application of load promotes hydrogen diffusion.The crack length is proportional to the hydrogen concentration and inversely proportional to the area of the diffusion region.
作者
杨富强
闫涛
YANG Fuqiang;YAN Tao(College of Science, Xi’an University of Science and Technology, Xi’an 710054, China;College of Mechanical Engineering, Xi’an University of Science and Technology, Xi’an 710054, China)
出处
《中国科技论文》
CAS
北大核心
2022年第7期815-822,共8页
China Sciencepaper
基金
陕西省自然科学基础研究计划项目(2020JM-523)
海洋腐蚀与防护国防科技国家重点实验室基金资助项目(6142901180101)。
关键词
氢脆
氢扩散
钛合金
裂纹尖端
COMSOL软件
hydrogen embrittlement
hydrogen diffusion
titanium alloy
crack tip
COMSOL software
