C276合金的抗辐照性能研究

C276合金为包壳部件的候选材料之一，本文拟对其抗辐照性能进行研究。对C276合金进行质子及多束粒子辐照，利用纳米硬度仪、透射电镜、拉曼成像仪等研究了C276合金在辐照前后的试样。结果表明：在质子及多束粒子辐照下，辐照损伤区域发生C偏析和位错环硬化；在H或He单束辐照条件下，在35.0 μm或3.5 μm深度处，拉曼光谱中的碳峰相对强度较大且碳峰红移，引起此处的纳米硬度较其他深度处的高；试验得到的损伤峰对应的深度与模拟计算得到的吻合。可推知，C276合金在质子及多束粒子下的辐照硬化是辐照偏析及可能的位错环硬化综合作用的结果。

Study on Anti-irradiation Performance of C276 Alloy

The anti-irradiation performance of C276 alloy which is one of candidate materials for the fuel cladding was studied. The samples of C276 alloy were irradiated by multiple ion beams with H, He and Si ions and the test samples before and after irradiation were studied with nano-hardness instrument, transmission electron microscope and Raman imaging instrument. The results show that under the multi-beam ion irradiation, C segregation and dislocation loop hardening occur in irradiation damage region; under the single ion beam irradiation with either H or He, the depth corresponding to the peak of nano-hardness and intensity of carbon peak in Raman spectra is 3.5 μm for He and 35.0 μm for H, and the carbon peak red-shift takes place, about which the test results agree well with the simulation calculation results. It can be concluded that irradiation-induced hardening of C276 alloy arises from co-effects of irradiation-induced segregation and possible dislocation loop hardening.