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首页> 外文期刊>Journal of Nuclear Materials: Materials Aspects of Fission and Fusion >THE EFFECT OF ALLOY COMPOSITION ON RADIATION-INDUCED SEGREGATION IN FE-CR-NI ALLOYS
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THE EFFECT OF ALLOY COMPOSITION ON RADIATION-INDUCED SEGREGATION IN FE-CR-NI ALLOYS

机译：合金成分对FE-CR-NI合金中辐射诱导的偏析的影响

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The effect of alloy composition on radiation-induced segregation (RIS) was investigated in austenitic iron-base and nickel-base alloys using proton irradiation. Specifically, RIS was studied by irradiation of Ni-18Cr, Ni-18Cr-9Fe, and Fe-20Cr-9Ni over a dose range of 0 to 1.0 dpa and a temperature range of 200 to 500 degrees C. Grain boundary composition was measured using Auger electron spectroscopy and scanning transmission electron microscopy with energy dispersive X-ray spectroscopy. Measurements from this study along with measurements from Fe-16Cr-24Ni, Fe-20Cr-24Ni, Fe-2rCr-24Ni, and Fe-24Cr-19Ni alloys irradiated with protons confirm that RIS is strongly dependent on the alloy composition. Trends in segregation behavior in Fe-base alloys are consistent with high temperature diffusion measurements, indicating that a vacancy mechanism is the most likely primary driving force for RIS in austenitic steels. The migration energy for Cr is shown to be larger than the migration energy of Fe, Segregation measurements in Ni-base alloys are not consistent with high temperature diffusion measurements, indicating that ordering forces may be significant in the segregation process, Comparison of model calculations to measured RIS data indicate that Fe, Cr, and Ni diffusivities axe composition dependent. This dependence on alloy composition limits the predictive ability of simple models because of the need for separate diffusion parameters for every alloy composition. [References: 29]
机译：使用质子辐照研究了奥氏体铁基和镍基合金中合金成分对辐射诱导偏析（RIS）的影响。具体地，通过在0至1.0dpa的剂量范围和200至500℃的温度范围内照射Ni-18Cr，Ni-18Cr-9Fe和Fe-20Cr-9Ni来研究RIS。使用以下方法测量晶界组成：俄歇电子能谱和具有能量色散X射线能谱的扫描透射电子显微镜。这项研究的测量结果，以及用质子辐照的Fe-16Cr-24Ni，Fe-20Cr-24Ni，Fe-2rCr-24Ni和Fe-24Cr-19Ni合金，都证明RIS在很大程度上取决于合金成分。铁基合金中偏析行为的趋势与高温扩散测量结果一致，表明空位机制是奥氏体钢中RIS最有可能的主要驱动力。结果表明，Cr的迁移能大于Fe的迁移能。Ni基合金中的偏析测量与高温扩散测量不一致，表明在偏析过程中有序力可能很重要。测量的RIS数据表明，Fe，Cr和Ni的扩散系数与成分有关。对合金成分的这种依赖性限制了简单模型的预测能力，因为每种合金成分都需要单独的扩散参数。 [参考：29]

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