【摘要】 以室温贮存经历的充氚不锈钢试样为研究对象,计算了充氚不锈钢中氚、氦浓度的深度分布,利用透射电镜观察了充氚不锈钢在加热过程中氦泡的演化行为。结果表明:在氚压0.131MPa、780℃充氚8h后,不锈钢中氚在深度方向分布均匀,平均浓度为110μL/L;在空气室温环境下放置6a后,不锈钢中氚衰变的氦浓度在深度方向分布均匀,平均浓度为60μL/L;对充氚不锈钢加热处理后,在550℃/1h时效即可观察到氦泡;在950℃/1h和1050℃/1h时效时,氦泡明显长大,大的可达100nm,小的可达30nm,在晶界、晶内和位错处均可见氦泡。更多还原

【Abstract】 The influence of thermomechanical heat treatments,aging conditions (temperature and time) on helium bubble precipitation in tritiated HR-2 stainless steel was deal with.Helium was generated by the radioactive decay of tritium (tritium trick).The concentration distribution of tritium and 3 He in tritiated HR-2 stainless steel vessels was calculated based on diffusion and decay theories.The results show that concentration distribution of tritium is about 110μL/L homogeneous in depth during the storage of tritium at the pressure of 0.131MPa for 8hat 780℃,and the concentration distribution of helium is about 60μL/L homogeneous in depth later exposed to air for about 6a. The bubbles can be observed in the stainless steel aged at 550℃/1h.The large bubbles in grain boundaries and dislocation present aged at 950 ℃/1hand 1 050℃/1hand bubble dragging by dislocations toward the grain boundaries.The larger bubbles are about 100nm and the smaller bubbles are about 30nm in diameter.更多还原