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Home > Archive>Volume 50, Issue 4, 2021 >1139-1145. DOI:10.12442/j.issn.1002-185X.20200259
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Experimental and theoretical analysis of void evolution during irradiation in 0.29V-0.09Ta RAFM steel
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Affiliation:

Key Laboratory of Advanced Materials of Ministry of Education, School of Materials Science and Engineering, Tsinghua University

Fund Project:

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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    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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[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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History
  • Received:April 19,2020
  • Revised:May 07,2020
  • Adopted:May 08,2020
  • Online: May 08,2021

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