Evolution of ion damage at 773K in Ni- containing concentrated solid-solution alloys
Evolution of ion damage at 773K in Ni- containing concentrated solid-solution alloys
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DOI：
10.1016/j.jnucmat.2018.01.015
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发表时间：
2018-04
影响因子：
3.1
通讯作者：
Shi Shi-Shi;M. He;K. Jin;H. Bei;I. Robertson
中科院分区：
文献类型：
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作者：
Shi Shi-Shi;M. He;K. Jin;H. Bei;I. Robertson
定量分析了一系列含镍的浓缩固溶体合金，Ni，NiCo，NiFe，NiCoCr，NiCoFeCr，NiCoFeCrMn和NiCoFeCrPd，在773 K下由1 MeV Kr离子辐照产生的缺陷的演变的组成复杂性的影响。通过在耦合到离子加速器的透射电子显微镜中的电子透明箔中进行离子辐照，直接观察到在辐照到每个原子2个位移的剂量期间损伤结构的演变的动力学。通过测量缺陷密度、缺陷尺寸以及完美环和弗兰克环的分数来评估缺陷演化。这三个参数取决于合金元素以及元素的数量。环的人口是敏感的离子剂量和合金成分的故障弗兰克回路被观察到无故障的完美的循环，随着离子剂量的增加。这些依赖性解释的位移级联的寿命以及缺陷的形成和迁移能量的每个元素的影响。
Quantitative analysis of the impact of the compositional complexity in a series of Ni-containing concentrated solid-solution alloys, Ni, NiCo, NiFe, NiCoCr, NiCoFeCr, NiCoFeCrMn and NiCoFeCrPd, on the evolution of defects produced by 1 MeV Kr ion irradiation at 773 K is reported. The dynamics of the evolution of the damage structure during irradiation to a dose of 2 displacements per atom were observed directly by performing the ion irradiations in electron transparent foils in a transmission electron microscope coupled to an ion accelerator. The defect evolution was assessed through measurement of the defect density, defect size and fraction of perfect and Frank loops. These three parameters were dependent on the alloying element as well as the number of elements. The population of loops was sensitive to the ion dose and alloy composition as faulted Frank loops were observed to unfault to perfect loops with increasing ion dose. These dependences are explained in terms of the influence of each element on the lifetime of the displacement cascade as well as on defect formation and migration energies.