铁素体钢中氢对材料辐照肿胀行为的影响

EFFECT OF HYDROGEN ON IRRADIATION SWELLING IN FERRITIC STEEL

利用离子加速器将氢离子注入ＪＦＭＳ合金试样，在超高压电子显微镜下进行电子辐照，对辐照空洞的形成过程进行原位观察，模拟研究了核反应（ｎ，ｐ）生成的氢对材料辐照肿胀的影响．实验结果表明，注氢主要对辐照空洞的形核产生促进作用，并由此促进材料的辐照肿胀．在５７０Ｋ辐照时，氢的这一促进辐照空洞形核的作用尚不十分明显，随着辐照温度的升高其作用逐渐增强．在６７０Ｋ辐照时，注氢可使辐照空洞的数密度增加一个数量级，材料的辐照肿胀率增加４倍左右．

JFMS alloy specimens were implanted with hydrogen ion by ion accelerator.and then electron irradiated by HVEM.The results showed that hydrogen implantation promotes the void nucleation under electron irradiation at above 570 K. At 670 K, the void number density in the specimen with hydrogen would be one order of magnitude higher than the specimen without hydrogen. Void swelling would also increase by hydrogen implantation.