消除应力热处理对SA738Gr.B钢离子辐照性能的影响

发布时间：2018-04-25 20:44

本文选题：SAGr.B + 消除应力热处理　；参考：《材料热处理学报》2015年S2期

【摘要】：利用离子辐照模拟中子辐照效应技术对AP1000安全壳用钢SA738Gr.B进行了高能氢离子辐照,采用透射电镜、聚焦离子束原位技术和正电子湮没技术,研究SA738Gr.B钢(两种热处理状态:淬火+回火态、淬火+回火+消除应力热处理(SR)态)经过高能氢离子辐照的辐照损伤行为。结果表明,在比较明显的辐照剂量下(0.2、0.5和1.0 dpa),钢基体中未观察到气泡、空位团等。两种样品的正电子湮没的寿命变化不大,说明这两种样品在试验所设计的辐照剂量下的微观缺陷变化不太明显。在位移损伤量为0.2~1.0 dpa的高能氢离子辐照下,两种热处理状态的SA738Gr.B/SA738Gr.B(SR)样品均具有良好的抗辐照肿胀能力。其中,在辐照剂量较大(0.5和1 dpa)时,SA738Gr.B样品的正电子寿命长于SA738Gr.B(SR),即SA738Gr.B样品的空位数量比SA738Gr.B(SR)更多,因此SA738Gr.B(SR)钢抗辐照性能更好。
[Abstract]:High energy hydrogen ion irradiation on AP1000 containment steel SA738Gr.B was carried out by ion irradiation simulation neutron irradiation technique. Transmission electron microscopy, focused ion beam in-situ technique and positron annihilation technique were used. The radiation damage behavior of SA738Gr.B steel (quenching tempering state, quenching tempering state, stress relieving heat treatment state) irradiated by high energy hydrogen ion was studied. The results show that there are no bubbles and vacancy clusters in the steel substrate at 0.2g 0.5 and 1.0 d. The change of positron annihilation lifetime of the two samples is not obvious, which indicates that the microdefects of the two samples are not changed obviously under the irradiation dose designed in the experiment. Under the irradiation of high energy hydrogen ions with a displacement damage of 0.2 ~ 1.0 dpa, SA738Gr.B / R / SA738Gr.BHSRs have good anti-swelling ability. The positron lifetime of SA738Gr.B sample is longer than that of SA738Gr.BNSRS, i.e., the number of vacancies in SA738Gr.B sample is more than that of SA738Gr.BNSRS, so the radiation resistance of SA738Gr.BNSRS steel is better.
【作者单位】：武汉钢铁(集团)公司研究院;
【分类号】：TG161;TG142.1

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