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Crack suppression in additively manufactured tungsten by introducing secondary-phase nanoparticles into the matrix
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Number of Authors: 102019 (English)In: International journal of refractory metals and hard materials, ISSN 0263-4368, Vol. 79, p. 158-163Article in journal (Refereed) Published
Abstract [en]

In this study, an effective strategy was developed to suppress cracking by introducing secondary-phase ZrC nanoparticles into a tungsten (W) matrix. Pure W and W-0.5wt%ZrC bulks were additively manufactured via the laser powder bed fusion (LPBF) technique, and their cracking behaviour was compared. It was observed that the crack density of W-ZrC was reduced by 88.7% compared with that of pure W. The grains in W-ZrC were obviously refined compared with the grains in pure W, which significantly increased the cracking resistance. In addition, ZrC diminished the oxygen impurities, further increasing the cracking resistance. This study provides a promising strategy for the additive manufacturing of high-quality W by introducing secondary-phase nanoparticles into the metal matrix.

Place, publisher, year, edition, pages
2019. Vol. 79, p. 158-163
Keywords [en]
Additive manufacturing, Crack control, W, ZrC nanoparticles, Grain refinement
National Category
Materials Engineering
Identifiers
URN: urn:nbn:se:su:diva-166767DOI: 10.1016/j.ijrmhm.2018.11.013ISI: 000456904700022OAI: oai:DiVA.org:su-166767DiVA, id: diva2:1296008
Available from: 2019-03-13 Created: 2019-03-13 Last updated: 2019-03-13Bibliographically approved

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Shen, Zhijian
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Department of Materials and Environmental Chemistry (MMK)
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