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Formation Mechanism of Nano-Strengthening Particles in Dispersion Strengthened W-Ti Alloys

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Abstract

<p>The realization of advanced fusion reactors rests upon improvements of plasma-facing materials for divertors. The toughness of tungsten is a critical issue for these improvements. As a solution, we developed dispersion-strengthened (DS) W-Ti alloys using a new process which is based on a combination of mechanical alloying (MA) and hot isostatic pressing. In this paper, the microstructure of new DS-W-Ti alloys and the formation mechanism of nano-strengthening particles are investigated. The produced DS-W-Ti alloys are dispersed with TiO2. The chemical analysis shows that new precipitation processes occurred during the MA based on redox reactions between carbon and oxygen.</p>

Journal

  • Plasma and Fusion Research

    Plasma and Fusion Research 15 (0), 1205021-1205021, 2020-04-15

    The Japan Society of Plasma Science and Nuclear Fusion Research

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