Irradiation Assisted Grain Boundary Segregation in Steels
Irradiation Assisted Grain Boundary Segregation in Steels
复制标题
钢中辐照辅助晶界偏析
DOI：
10.1557/proc-981-0981-jj05-09
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发表时间：
2006
影响因子：
3.1
通讯作者：
R. Faulkner
中科院分区：
文献类型：
--
作者：
Z. Lu;R. Faulkner
在过去的十年中，对辐射引起的晶界偏析（RIS）的理解有了很大的提高。新的模型已经被引入，并且已经投入了大量的努力来从文献中获取有关隔离的全面信息。分析技术也得到了改进，1 nm 厚的层的化学分析几乎已成为常规。本特邀论文将回顾目前用于 RIS 预测的主要方法：即速率理论、逆 Kirkendall 方法和溶质阻力方法。对反应堆压力容器 (RPV) 钢中磷 RIS 的现有数据进行了总结。我们将根据各种模型的预测对此进行讨论，以表明哪些模型最可靠且易于用于预测钢中的 P 偏析行为。 RPV 钢中 RIS 的结果是辐射引起延性至脆性转变温度 (DBTT) 的转变。将展示如何将辐射引起的 P 偏析水平与 DBTT 偏移联系起来。本练习的示例将针对 RPV 钢和考虑用于第一壁熔合应用的铁素体钢。我们还将简要讨论高合金不锈钢中的 Cr RIS 和相关的辐照辅助应力腐蚀开裂 (IASCC)。 （作者）« 更少
The understanding of radiation-induced grain boundary segregation (RIS) has considerably improved over the past decade. New models have been introduced and much effort has been devoted to obtaining comprehensive information on segregation from the literature. Analytical techniques have also improved so that chemical analysis of layers 1 nm thick is almost routine. This invited paper will review the major methods used currently for RIS prediction: namely, Rate Theory, Inverse Kirkendall, and Solute Drag approaches. A summary is made of the available data on phosphorus RIS in reactor pressure vessel (RPV) steels. This will be discussed in the light of the predictions of the various models in an effort to show which models are the most reliable and easy to use for forecasting P segregation behaviour in steels. A consequence of RIS in RPV steels is a radiation induced shift in the ductile to brittle transition temperature (DBTT). It will be shown how it is possible to relate radiation-induced P segregation levels to DBTT shift. Examples of this exercise will be given for RPV steels and for ferritic steels being considered for first wall fusion applications. Cr RIS in high alloy stainless steels and associated irradiation-assisted stress corrosion cracking (IASCC) willmore » be briefly discussed. (authors)« less