In situ transmission electron microscopy study of growth of dislocation loops in Fe-Ni alloy under ion irradiation
In situ transmission electron microscopy study of growth of dislocation loops in Fe-Ni alloy under ion irradiation
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DOI：
10.1016/j.scriptamat.2020.06.071
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发表时间：
2020-10
影响因子：
6
通讯作者：
Liang Chen;Kenta Murakami;Dongyue Chen;H. Abe;Zhengcao Li;N. Sekimura
中科院分区：
文献类型：
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作者：
Liang Chen;Kenta Murakami;Dongyue Chen;H. Abe;Zhengcao Li;N. Sekimura
对Fe-0.6Ni合金进行了预辐照后的透射电子显微镜原位辐照，研究了辐照后位错环的生长情况。观察显示了两种类型的环路生长行为。一种是与辐照剂量几乎成线性关系的生长，可能是由于环形吸收自由迁移缺陷所致。另一种是生长陡峭，直径迅速增大。研究发现，纳米尺度的环可以一维迁移，随后大环可以吸收小环。这一过程可能导致环的突然增长和环大小分布的加宽。
In situ irradiation in transmission electron microscope following pre-irradiation was performed on Fe-0.6Ni alloy to investigate the growth of dislocation loops under irradiation. The observations showed two types of loop growth behaviour. One type was almost linear growth with irradiation dose, possibly caused by loop absorbing freely migrating defects. The other was abrupt growth with rapid increase in diameter. It was found that nanometre-sized loop might migrate one-dimensionally, following which the large loop could absorb the small loop. This process can result in the abrupt growth of loop and broadening of loop size distribution.