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Influence of Carbon Nanotubes on Defects in AlSi10Mg Alloy Fabricated by Selective Laser Melting
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2019 (Chinese)In: Xiyou jinshu cailiao yu gongcheng, ISSN 1002-185X, Vol. 48, no 5, p. 1637-1644Article in journal (Refereed) Published
Abstract [zh]

Pure AlSi10Mg alloy and carbon nanotubes (CNTs)-AlSi10Mg composite with different CNTs additions were fabricated by selective laser melting (SLM). The CNTs-AlSi10Mg composite is strengthened when the CNTs content is lower than 0.05 wt%. With the increasing CNTs content, however, the strength is decreased significantly because of the poor density. In order to understand the influence of CNTs on the defects in SLMed AlSi10Mg alloy, nano-CT technology was used to get the 3D information of the defects. The results indicate that the volume fraction of large defects (with diameter larger than 50 mu m) in the total volume of defects is increased from 12% to 46% in CNTs(0.5wt%)-AlSi10Mg composite. The number of gas pores in CNTs(0.5wt%)-AlSi10Mg composite are significantly increased. The diameter of gas pores in CNTs(0.5wt%)-AlSi10Mg composite are larger than that in pure AlSi10Mg alloy. The agglomeration of CNTs in the powder and gas adsorption are the fundamental reasons for the increase of the two types of defects.

Place, publisher, year, edition, pages
2019. Vol. 48, no 5, p. 1637-1644
Keywords [en]
selective laser melting, AlSi10Mg, carbon nanotubes, defect, nano-CT
National Category
Materials Engineering
Identifiers
URN: urn:nbn:se:su:diva-171184ISI: 000470794300040OAI: oai:DiVA.org:su-171184DiVA, id: diva2:1351398
Available from: 2019-09-16 Created: 2019-09-16 Last updated: 2019-09-16Bibliographically approved

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