双束（H+/e-）辐照下氢对12Cr-ODS铁素体钢组织损伤影响研究

利用氢离子（H⁺）束和电子（e^-）束双束（H⁺/e^-）同时辐照用化学浸润法制备的新型12Cr-ODS铁素体钢，研究其辐照损伤效应及组织变化。实验结果表明：由于氧化物的钉扎，基体内保持低密度位错网络；辐照初期随辐照剂量的增加，缺陷团在位错线上及其周围形成，尺寸增加，密度不断增大，并形成间隙型位错环；不同温度下辐照均产生小尺寸高密度的空洞，随辐照剂量的增大，空洞长大速度降低，空洞密度缓慢减小；不同温度下，辐照剂量达15dpa时，空洞肿胀均小于0.15%。对辐照产生的点缺陷与氢相互作用进行理论分析，12Cr-ODS铁素体钢在623~823K经双束辐照后，表现出良好的抗辐照损伤性。

Effect of Hydrogen/Electron Dual-beam Irradiation on Microstructure Damage of 12Cr-ODS Ferrite Steel

The effects of hydrogen/electron dual-beam irradiation on the microstructure damage behavior of a new 12Cr-ODS ferrite steel made by chemical socking method was studied in this work. The results show that, at the beginning of irradiation, the disloca-tion networks remain in the matrix owing to the pinning of oxides; as dose increases,defect clusters start to form on/around the dislocations, their number densities get high-er and sizes become lager, then the defect clusters turn into interstitial dislocation loops; the voids can form at different temperatures with high number density and small size; also with the increasing of dose, the coarsening rates of the voids slow down, andthe number densities of the voids decrease slightly;with a dose of 15 dpa,all the void swellings are 0.15% smaller even at different temperatures.The 12Cr-ODS ferrite steel shows a good resistance to irradiation during the dual-beam irradiations over 623-823 K.