Preheat effect on titanium plate fabricated by sputter-free selective laser melting in vacuum

Sato, Yuji*; Tsukamoto, Masahiro*; Shobu, Takahisa ; Yamashita, Yoshihiro*; Yamagata, Shuto*; Nishi, Takaya*; Higashino, Ritsuko*; Okubo, Tomomasa*; Nakano, Hitoshi*; Abe, Nobuyuki*

The dynamics of titanium (Ti) melted by laser irradiation was investigated in a synchrotron radiation experiment. As an indicator of wettability, the contact angle between a selective laser melting (SLM) baseplate and the molten Ti was measured by synchrotron X-rays at 30 keV during laser irradiation. As the baseplate temperature increased, the contact angle decreased, down to 28 degrees at a baseplate temperature of 500 $^{circ}$ C. Based on this result, the influence of wettability of a Ti plate fabricated by SLM in a vacuum was investigated. It was revealed that the improvement of wettability by preheating suppressed sputtering generation, and a surface having a small surface roughness was fabricated by SLM in a vacuum.

Language	:	English
Journal	:	Applied Physics A
Volume	:	124
Number	:	4
Pages	:	p.288_1 - 288_6
Publication Year/Month	:	2018/04
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Paper URL	:	https://doi.org/10.1007/s00339-018-1712-4
DOI for research data	:	Link to research data related to this paper/report.
Keywords	:	Preheat effect; sputter-free; selective laser melting; Synchrotron Radiation
Research Facility	:	SPring-8(大型放射光施設)
Press Release	:
Article of JAEA R&D Review	:	Successful Observation of the Melting and Solidification Phenomena of Metal with a Time Resolution of One Millisecond; Contributing to the Advancement of Laser Welding Technology[/]
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InCites™	:	Percentile:62.72 Category:Materials Science, Multidisciplinary
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Registration No. : AA20180024
JAEA Abstracts No. : 47000361
Paper Submission No. : 21033

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