O. T. Tsyrulnyk, O. Z. Student, O. I. Zvirko, D. O. Demianchuk, O. I. Venhryniuk
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引用次数: 0
摘要
氢脆引起的断裂是天然气管道氢气运输可靠性和安全性的主要问题。管道钢具有高塑性的特点，因此，包括 J 积分法在内的非线性断裂力学方法是确定断裂韧性的首选方法。研究了在适度模式下初步电化学充氢对 API 5L X67 钢在交货时和在天然气主管道上运行 34 年的条件下断裂韧性的影响。实验方法的一个特点是对有裂纹的试样采用不同速率的机械加载。根据不同的试验条件，揭示了钢材长期运行对其脆性断裂抗力的影响。
Assessment of Hydrogen Embrittlement of Operated Pipe Steel Using the J-Integral Method
Fracture due to hydrogen embrittlement is a major concern for the reliability and safety of hydrogen transportation via gas pipelines. Pipe steels are characterized by high plasticity, therefore, methods of nonlinear fracture mechanics, including the J-integral method, are preferred for determining the fracture toughness. The influence of preliminary electrochemical hydrogen charging under a moderate mode on fracture toughness of API 5L X67 steel in the as-delivered and 34-year operated on the gas main pipeline conditions was studied. A methodological feature of the experiments is the use of different rates of mechanical loading of specimens with cracks. The influence of the long-term operation of steel on its resistance to brittle fracture is revealed, depending on the test conditions.
期刊介绍：
Materials Science reports on current research into such problems as cracking, fatigue and fracture, especially in active environments as well as corrosion and anticorrosion protection of structural metallic and polymer materials, and the development of new materials.
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