Melting and solidification behavior of Ti-6Al-4V powder during selective laser melting

  • Shunya YamamotoEmail author
  • Hisashi Azuma
  • Shinsuke Suzuki
  • Satoshi Kajino
  • Naoko Sato
  • Toshimitsu Okane
  • Shizuka Nakano
  • Toru Shimizu


To investigate melting and solidification behavior during selective laser melting (SLM), the shape of the solidified materials and energy balance during SLM were evaluated through temperature measurements with a two-color pyrometer. The laser power and scanning speed were selected as parameters to melt Ti-6Al-4V powder in a square area. The input energy per unit area used during SLM was 5, 10, 16, or 20 J/mm2. The melting depth and width increased as the input energy increased. However, the aspect ratio of the melted area was constant. The mass ratio of melted to sintered material decreased as input energy increased. It was considered that the surplus input energy was used for sintering when the energy was high. Color maps show that the surface temperature distribution around the laser irradiation area was asymmetric, in which the temperature gradient at the solidified material side was smoother than that at powder side. The temperature history showed that melting and solidification occurred repeatedly during irradiation.


Selective laser melting Additive manufacturing Ti-6Al-4V Temperature measurement Melting Solidification 


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Funding information

This research was supported by Japan Science and Technology (JST), under the Industrial-Academia Collaborative R&D Program “Heterogeneous Structure Control: Towards Innovative Development of Metallic Structural Materials.”


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Copyright information

© Springer-Verlag London Ltd., part of Springer Nature 2019

Authors and Affiliations

  • Shunya Yamamoto
    • 1
    Email author
  • Hisashi Azuma
    • 1
  • Shinsuke Suzuki
    • 1
    • 2
  • Satoshi Kajino
    • 3
  • Naoko Sato
    • 3
  • Toshimitsu Okane
    • 3
  • Shizuka Nakano
    • 3
  • Toru Shimizu
    • 3
    • 4
  1. 1.Graduate School of Fundamental Science and EngineeringWaseda UniversityTokyoJapan
  2. 2.Kagami Memorial Research Institute of Materials Science and TechnologyWaseda UniversityTokyoJapan
  3. 3.National Institute of Advanced Industrial Science and Technology (AIST)IbarakiJapan
  4. 4.Graduate School of Science and EngineeringTokyo Denki UniversitySaitamaJapan

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