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Institute of Metallurgy and Materials Science of Polish Academy of Sciences
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PROPERTIES OF PURE Ti IMPLANTS FABRICATED BY ADDITIVE MANUFACTURING

  • DONG-JIN KIM (DEPARTMENT OF WELDING AND JOINING SCIENCE ENGINEERING, CHOSUN UNIVERSITY) ;
  • HYUNG-GIUN KIM (KOREA INSTITUTE OF INDUSTRIAL TECHNOLOGY, ADDITIVE MANUFACTURING PROCESS R&D GROUP) ;
  • JI-SUN KIM (KOREA INSTITUTE OF INDUSTRIAL TECHNOLOGY, GREEN MANUFACTURING PROCESS R&D GROUP) ;
  • KUK-HYUN SONG (DEPARTMENT OF WELDING AND JOINING SCIENCE ENGINEERING, CHOSUN UNIVERSITY)
  • Published : 20190000
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Abstract

This study was carried out to evaluate the aspect of microstructure and mechanical property development on additive manufactured pure Ti at elevated heat-input. For this work, pure Ti powder (commercial purity, grade 1) was selected, and selective laser melting was conducted from 0.5 to 1.4 J/mm. As a result, increase in heat-input led to the significant grain growth form 4 ㎛ to 12 ㎛, accompanying with the change of grain shape, correctly widmanstätten structured grains. In addition, Vickers microhardness was notably increased from 228 Hv to 358 Hv in accordance with elevated heat-input, which was attributed to the increased concentration of oxygen and nitrogen mainly occurred during selected laser melting process.

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