管线钢中氢脆温度依赖性的量化

Quantification of Temperature Dependence of Hydrogen Embrittlement in Pipeline Steel.

作者信息

Xing Xiao, Zhou Jiayu, Zhang Shouxin, Zhang Hao, Li Zili, Li Zhenjun

机构信息

College of Pipeline and Civil Engineering, China University of Petroleum (East China), Qingdao 266500, China.

Department of Chemical and Materials Engineering, University of Alberta, Edmonton, AB T6G 1H9, Canada.

出版信息

Materials (Basel). 2019 Feb 15;12(4):585. doi: 10.3390/ma12040585.

DOI:10.3390/ma12040585

PMID:30781386

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6416715/

Abstract

The effects of temperature on bulk hydrogen concentration and diffusion have been tested with the Devanathan⁻-Stachurski method. Thus, a model based on hydrogen potential, diffusivity, loading frequency, and hydrostatic stress distribution around crack tips was applied in order to quantify the temperature's effect. The theoretical model was verified experimentally and confirmed a temperature threshold of 320 K to maximize the crack growth. The model suggests a nanoscale embrittlement mechanism, which is generated by hydrogen atom delivery to the crack tip under fatigue loading, and rationalized the Δ dependence of traditional models. Hence, this work could be applied to optimize operations that will prolong the life of the pipeline.

摘要

采用德瓦纳坦⁻斯塔楚尔斯基方法测试了温度对氢总体浓度和扩散的影响。因此，应用了一个基于氢势、扩散率、加载频率以及裂纹尖端周围静水应力分布的模型，以量化温度的影响。该理论模型通过实验得到验证，并确定了使裂纹扩展最大化的温度阈值为320K。该模型提出了一种纳米级脆化机制，即在疲劳载荷下氢原子输送到裂纹尖端产生这种机制，并使传统模型的Δ依赖性合理化。因此，这项工作可应用于优化操作，从而延长管道寿命。