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AP-FIM analysis of niobium distribution at austenite recovery stage in hot-deformed steels

机译:AP-FIM分析热变形钢中奥氏体恢复阶段铌分布

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摘要

The distribution of niobium in hot-deformed HSLA steels in the early stage of austenite recovery was investigated by an atom-probe field ion microscope (AP-FIM). It was confirmed that the onset of recovery can be inhibited by solute niobium randomly dispersed in the austenite matrix. Simple calculation conducted by considering the interactions between the Solute atoms and defects indicates that the strong retardation ability of nio- Bium as compared with titanium, vanadium, and molybdenum is a result of Larger impurity diffusion coefficients and solute-lattice defect interactions.
机译:通过原子探针场离子显微镜(AP-FIM)研究了奥氏体回收早期热变形HSLA钢中铌的分布。已经证实,通过随机分散在奥氏体基体中的溶质铌可以抑制恢复的开始。通过考虑溶质原子与缺陷之间的相互作用进行的简单计算表明,与钛,钒和钼相比,铌的强阻滞能力是较大的杂质扩散系数和溶质-晶格缺陷相互作用的结果。

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