Effects of Carbon Ion Irradiation on Microstructure and Surface Hardness of Pure Tungsten AITranslate

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Chinese Library Classification Number:TG146.411[金属学及工艺—金属材料]

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The effects of carbon ion irradiation at 7oo C on the surface morphology,microstructure and surface hardness of pure tungsten were studied by scanning electron microscopy,transmission electron microscopy and nanoindenter.The results show that carbon ion irradiation can lead to irradiated pits on the surface of the samples,and the size of the pits increases with the increase of irradiation dose.Carbon ion irradiation produces a large number of dislocation loops inside the sample,and the size and number density of the loops increase with the increase of radiation dose.Also,carbon ion irradiation causes a severe irradiation hardening effect on the tungsten surface,and the surface hardness of the samples increases significantly with the increases of irradiation dose.The average hardness of the tungsten surface reaches 15.85 GPa when the irradiation dose reaches 8.0 dpa.The dislocation loops generated by irradiation are the main cause of the irradiation hardening.