On the influence of microstructure on the neutron irradiation response of HIPed SA508 steel for nuclear applications
On the influence of microstructure on the neutron irradiation response of HIPed SA508 steel for nuclear applications
复制标题
微观组织对核用HIPed SA508钢中子辐照响应的影响
DOI：
10.1016/j.jnucmat.2021.153435
复制
发表时间：
2022
影响因子：
3.1
通讯作者：
Carter M
中科院分区：
文献类型：
--
作者：
Carter M
研究了一种新型热等静压SA 508钢的中子辐照响应，以推断这种非常规的RPV组织对辐照响应的影响。特别地，研究了升高的铁素体分数的作用。在155 ± 10°C下进行中子辐照以诱导0.1dpa的损伤，这对应于铁素体的2.53 ± 0.63 GPa硬化和贝氏体的1.94 ± 0.57 GPa硬化，如通过纳米压痕测量的。原子探针断层扫描检测到的Mn-Ni-Si型集群在两个微观组成相的存在。铁素体显微组织显示出更大百分比的溶质原子可用于形成团簇比贝氏体，但它也包含一个较低的团簇体积分数和数量密度相比，贝氏体。
The neutron irradiation response of a novel hot isostatically pressed SA508 Grade3 steel was studied, such to deduce any influence this unconventional RPV microstructure has on radiation response. In particular, the role of elevated ferrite fraction was investigated. Neutron irradiation was conducted at 155 ± 10°C to induce 0.1dpa of damage, this corresponded 2.53 ± 0.63 GPa hardening for the ferrite and 1.94 ± 0.57 GPa for the bainite as measured by nanoindentation. Atom probe tomography detected the presence of Mn-Ni-Si type clusters in both microconstituent phases. The ferrite microstructure showed a greater percentage of solute atoms available to form clusters than bainite, but it also contained a lower cluster volume fraction and number density compared to the bainite.