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0.29V-0.09Ta RAFM鋼輻照條件下空洞演化的實(shí)驗(yàn)和理論研究
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清華大學(xué)材料學(xué)院先進(jìn)材料教育部重點(diǎn)實(shí)驗(yàn)室

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基金項(xiàng)目:

The National Natural Science Foundation of China (Grant 51771097), Tsinghua University Initiative Scientific Research Program, The National Key Research and Development Plan (Grant 2017YFB0305201), The Science Challenge Project (Grant TZ2018004).


Experimental and theoretical analysis of void evolution during irradiation in 0.29V-0.09Ta RAFM steel
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Key Laboratory of Advanced Materials of Ministry of Education, School of Materials Science and Engineering, Tsinghua University

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The National Natural Science Foundation of China (Grant 51771097), Tsinghua University Initiative Scientific Research Program, The National Key Research and Development Plan (Grant 2017YFB0305201), The Science Challenge Project (Grant TZ2018004).

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    摘要:

    為研究輻照條件下空洞的演化,分別在200 °C, 350 °C和550 °C對(duì)低活化鐵素體/馬氏體鋼(RAFM)進(jìn)行He離子輻照。實(shí)驗(yàn)結(jié)果顯示輻照損傷沿深度呈鐘型分布,空洞的尺寸和密度均與空位產(chǎn)生率正相關(guān)。隨著輻照溫度升高,空洞的尺寸增大,密度降低,高溫下可以觀察到空洞在晶界的聚集和無(wú)空洞區(qū)(VDZs),在550 °C可以觀察到方形空洞。使用相場(chǎng)模型模擬空洞的演化機(jī)制,模擬結(jié)果顯示輻照條件下空洞演化可以分為孕育、形核和生長(zhǎng)三個(gè)階段,空洞界面能的各項(xiàng)異性是空洞形狀的可能原因。

    Abstract:

    Helium ion irradiation at 200 °C, 350 °C and 550 °C was performed on a reduced activation ferritic/martensitic (RAFM) steel to investigate the evolution of voids during irradiation. Experimental results showed that radiation damage had a bell-shape distribution along the depth. Both void size and density increased as vacancy production rate increased. When irradiation temperature rose, void size increased and void density decreased. Faceted voids were observed at 550 °C. Voids aggregation at grain boundaries (GBs) and void denuded zones (VDZs) were observed at high temperatures. A phase field model was employed to investigate the void evolution mechanism. The simulation results showed that the void shape may be attributed anisotropic void interface energy. During irradiation, as time goes on, void evolution can be divided into three stages: incubation stage, nucleation stage and growth stage.

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夏禮棟,霍曉杰,陳浩,楊志剛,張弛.0.29V-0.09Ta RAFM鋼輻照條件下空洞演化的實(shí)驗(yàn)和理論研究[J].稀有金屬材料與工程,2021,50(4):1139~1145.[Xia Lidong, Huo Xiaojie, Chen Hao, Yang Zhigang, Zhang Chi. Experimental and theoretical analysis of void evolution during irradiation in 0.29V-0.09Ta RAFM steel[J]. Rare Metal Materials and Engineering,2021,50(4):1139~1145.]
DOI：10.12442/j. issn.1002-185X.20200259

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  • 收稿日期:2020-04-19
  • 最后修改日期:2020-05-07
  • 錄用日期:2020-05-08
  • 在線發(fā)布日期: 2021-05-08
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