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A general method to predict the crack propagation of anodic dissolution corrosion fatigue is developed in this paper. Crack propagation of corrosion fatigue is presented as the result of the synergistic interactions of mechanical and environmental factors, and corrosive environment accelerates crack propagation mainly in term of anodic dissolution. By studying the variation of mechanical energy and electrochemical energy of anodic dissolution during the crack propagation process, an explicit expression of crack propagation rate is derived by the conservation of energy. The comparisons with experimental data demonstrate the validity of the proposed model. Moreover, the applicable upper-limit crack length for steady crack propagation is determined and the crack propagation life is evaluated. 相似文献
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研究了汽车转向器零件在激光淬火工艺和硬化组织特征,对激光淬火件进行了疲劳寿命、耐磨性,传动效率等综合性能试验,结果表明,对QT400-10材质的转向器零件,用激光表面强化方法代替DX轴承套在技术上和经济上是可行的。 相似文献
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刍议加强船员的职业道德教育 总被引:1,自引:0,他引:1
结合典型案例,从船员职业道德的角度入手,探讨、分析船舶事故中的人为矢误问题,阐释人为失误与船员职业道德的关系,最后提出要加强船员职业道德教育,以减少人为失误,增强航行安全。 相似文献
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