Effect of solute elements (Ni, Mn) in Fe-based alloys on dislocation loop evolution under Fe2+ ion irradiation
Effect of solute elements (Ni, Mn) in Fe-based alloys on dislocation loop evolution under Fe2+ ion irradiation
复制标题
Fe2离子辐照下铁基合金中溶质元素(Ni、Mn)对位错环演化的影响
DOI:
10.1016/j.jnucmat.2021.153489
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发表时间:
2022
影响因子:
3.1
通讯作者:
Chen Liang
中科院分区:
文献类型:
--
作者:
Prak Tom Phongsakorn;Murakami Kenta;Luu Vu Nhut;Nguyen Ba Vu Chinh;Chen Liang
The dislocation loop is known as one of the irradiation defects that contributes to hardening and accompanying embrittlement in reactor pressure vessel steels. In this study, the effect of solute elements such as Ni and Mn in Fe-based alloys on dislocation loop evolution was investigated using ion irradiation. Pure Fe and Fe model alloys, Fe-0.6Ni and Fe-0.6Ni-1.4Mn, were irradiated by 2.8 MeV Fe ions to a peak dose of 3 displacements per atom (dpa) at 400 °C. Quantitative analysis of transmission electron microscopy (TEM) was conducted to analyze the evolution of dislocation loops. As a result, the presence of solute elements in Fe alloys increased the number density of dislocation loops significantly and decreased their mean size slightly. Both types of dislocation loops, ½<111> and <100> Burgers vectors, were observed in all specimens. Solute elements reduced the mobility of ½<111> dislocation loops, resulting in an increase in their number density and restricting the growth of <100> dislocation loops. Furthermore, an increase in the number density of <100> dislocation loops of small size was found with higher solute contents.
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