Effects of solute elements on microstructural evolution in Fe-based alloys during neutron irradiation following thermal ageing
Effects of solute elements on microstructural evolution in Fe-based alloys during neutron irradiation following thermal ageing
复制标题
热老化后中子辐照过程中溶质元素对铁基合金显微组织演变的影响
DOI：
10.1016/j.jnucmat.2017.10.026
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发表时间：
2018
影响因子：
3.1
通讯作者：
N. Sekimura
中科院分区：
文献类型：
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作者：
Liang Chen;K. Nishida;Kenta Murakami;Li Liu;Tomohiro Kobayashi;Zhengcao Li;N. Sekimura
采用Fe-Cu、Fe-Cu-Ni、Fe-Cu-Ni-Mn和Fe-Cu-Si合金进行热老化实验后的中子辐照，研究Ni、Mn和Si对富cu团簇形成及其化学成分的影响。原子探针层析显示，Ni和Mn增加了富cu团簇的数量密度。这可能是由于Ni和Mn降低了Cu核的形成能，从而提高了Cu的成核速率。由于锰与自间隙原子的强相互作用，也可能增强铜的非均相成核。此外，Mn还能加速溶质在热时效过程中的扩散。高Ni合金含量提高了团簇中Mn的浓度，同时也提高了Ni的浓度，这可能是由Ni和Mn之间的热力学关系引起的。在Fe-Cu-Si合金中，团簇中的Si含量很低，与Si的合金化含量相当。这表明Si原子几乎不与Cu聚集。
Neutron irradiation following thermal ageing experiments were performed using Fe-Cu, Fe-Cu-Ni, Fe-Cu-Ni-Mn, and Fe-Cu-Si alloys to investigate the effects of Ni, Mn, and Si on the formation of Cu-rich clusters and their chemical composition. Atom probe tomography showed that Ni and Mn increased the number density of Cu-rich clusters. This can be caused by that Ni and Mn reduce the formation energy of Cu nuclei, thus enhancing the Cu nucleation rate. Mn may also enhance the heterogeneous nucleation of Cu because of its strong interaction with self-interstitial atoms. In addition, Mn can accelerate solute diffusion during thermal ageing. A high Ni alloying content enhanced the Mn concentration in the clusters as well as the Ni concentration, which is believed to be caused by the thermodynamic relationship between Ni and Mn. In Fe-Cu-Si alloys, the Si concentration in the clusters was very low and was comparable to the Si alloying content. This indicates that Si atoms hardly cluster with Cu.
Shouki, M：“大鼠心脏中肌醇 1,4,5-三磷酸激酶（IP3-激酶）的活性”Pergamon Press，4 (1989)
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