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首页> 外文期刊>Corrosion science >Understanding the effect of niobium on hydrogen-induced blistering in pipeline steel: A combined experimental and theoretical study
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Understanding the effect of niobium on hydrogen-induced blistering in pipeline steel: A combined experimental and theoretical study

机译:了解铌对管线钢中氢引起的起泡的影响:结合实验和理论研究

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摘要

The effect of Nb on hydrogen-induced blistering in pipeline steel was investigated experimentally and computationally. Nb does not change the nucleation mechanism, but influences the nucleation sites and amount: when the individual precipitate independently contributes to retarding or promoting blister nucleation, the critical size of NbC is (similar to)226 nm, which decreases even to 120 nm when two adjacent precipitates are involved. Nb inhibits the blister growth through optimizing microstructure and NbC-induced strong hydrogen traps, showing no strong correlation with NbC size. Few-nanometer-sized NbC inhibits the blister on blister, while the large NbC facilitates the blister on blister through directly nucleating small blister at NbC/matrix interface and promoting dislocation-stress trap nucleation.
机译:实验和计算研究了铌对管线钢中氢引起的起泡的影响。 Nb不会改变成核机理,但会影响成核部位和数量:当单个沉淀物独立地有助于延缓或促进水泡成核时,NbC的临界尺寸为(类似于)226 nm,当两个相变时甚至减小至120 nm。邻近的沉淀物。 Nb通过优化微观结构和NbC诱导的强氢陷阱来抑制水疱的生长,与NbC的大小没有明显的相关性。几纳米大小的NbC抑制了水泡上的水泡,而大的NbC通过在NbC /基质界面上直接成核小水泡并促进位错应力阱成核,促进了水泡上的水泡。

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