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Cracking Behavior in Additively Manufactured Pure Tungsten
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Number of Authors: 62019 (English)In: Acta Metallurgica Sinica (English Letters), ISSN 1006-7191, E-ISSN 2194-1289, Vol. 32, no 1, p. 127-135Article in journal (Refereed) Published
Abstract [en]

In this study, near fully dense (96.5%) pure tungsten bulks were additively manufactured and the cracking behavior was investigated. A crack network with a spacing of similar to 100m was observed in the fabricated bulks. It was observed that the laser scanning strategy, which could tailor the microstructure, affected the crack distribution pattern in fabricated tungsten. The calculated surface temperature difference (7300K) was much higher than the cracking criterion (800K) of tungsten, indicating that cracking is almost inevitable in laser additive manufacturing of tungsten. It could be concluded that crack network formed because the cracks emerged in every laser molten track and then interconnected in the layer-by-layer building process.

Place, publisher, year, edition, pages
2019. Vol. 32, no 1, p. 127-135
Keywords [en]
Tungsten, Selective laser melting, Cracking, Microstructure
National Category
Materials Engineering
Identifiers
URN: urn:nbn:se:su:diva-165702DOI: 10.1007/s40195-018-0752-2ISI: 000455515500013OAI: oai:DiVA.org:su-165702DiVA, id: diva2:1285579
Available from: 2019-02-04 Created: 2019-02-04 Last updated: 2019-02-04Bibliographically approved

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Shen, Zhi-Jian
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Department of Materials and Environmental Chemistry (MMK)
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