论文部分内容阅读
本文用超高压电镜(HVEM)作为电子束源,研究了Fe-15％Cr-30％Ni合金电子辐照后,合金空洞体胀和诱起晶界偏析.实验结果证明:723K,最大剂量15dpa条件下,体胀量为0.62％.在晶界发生Cr贫化、Ni富化.随着辐照温度提高,晶界偏析程度增加,723K时Cr,Ni在晶界出现最大偏析峰,相应空洞体胀量也最大.结果表明,空洞形成和晶界偏析密切相关,本文提出了辐照诱起晶界偏析模型.
In this paper, the alloy hollow body swelling and grain boundary segregation induced by electron irradiation of Fe-15% Cr-30% Ni alloy were studied by using high voltage electron microscope (HVEM) as electron beam source.The experimental results show that the maximum dose of 15dpa , The volume expansion was 0.62%. Cr depletion and Ni enrichment occurred at the grain boundaries.With the increase of irradiation temperature, the degree of grain boundary segregation increased, and the maximum segregation peak of Cr and Ni appeared at the grain boundaries at 723K, and the corresponding cavity Body volume expansion is also the largest.The results show that cavity formation and grain boundary segregation are closely related to each other, and the grain boundary segregation model induced by irradiation is proposed in this paper.