#6694. In-situ TEM investigation of dislocation loop reaction and irradiation hardening in H2+-He+ dual-beam irradiated Mo

August 2026publication date
Proposal available till 19-05-2025
4 total number of authors per manuscript0 $

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Journal’s subject area:
Metals and Alloys;
Polymers and Plastics;
Mechanical Engineering;
Mechanics of Materials;
Materials Chemistry;
Ceramics and Composites;
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Abstract:
Through in-situ TEM observation during 30 keV H2+-He+ dual-beam irradiation at 723 K, the reaction and transformation of dislocation loops in pure Mo were investigated, especially for [removed] loops. Irradiation could directly cause the formation of 1/2[removed] loops and [removed] loops, but 1/2[removed] loops were dominant. In-situ observation confirmed the formation mechanism of [removed] loops, including direct irradiation induced mechanism, 1/2[removed] loop direct conversion mechanism, and reaction mechanism of two 1/2[removed] loops. Meanwhile, the reaction of two 1/2[removed] loops to produce [removed] loop should not require the strict size similarity condition. The reaction between 1/2[removed] loops could also produce 1/2[removed] loop, which was essentially a process in which one loop absorbed another one.
Keywords:
Dislocation loop; Hydrogen helium irradiation; In-situ TEM observation; Irradiation hardening; Molybdenum

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