Frontiers of Materials Science

, Volume 10, Issue 4, pp 428–431 | Cite as

Microstructure and inclusion of Ti–6Al–4V fabricated by selective laser melting

  • Qianli Huang
  • Ningmin Hu
  • Xing Yang
  • Ranran Zhang
  • Qingling Feng


Selective laser melting (SLM) was used in fabricating the dense part from pre-alloyed Ti-6Al-4V powder. The microstructural evolution and inclusion formation of as-fabricated part were characterized in depth. The microstructure was characterized by features of columnar prior β grains and acicular martensite α'. High density defects such as dislocations and twins can be produced in SLM process. Investigations on the inclusions find out that hard alpha inclusion, amorphous CaO and microcrystalline Al2O3 are three main inclusions formed in SLM. The inclusions formed at some specific sites on melt pool surface. The microstructural evolution and inclusion formation of as-fabricated material are closely related to the SLM process.


metals and alloys laser processing microstructure inclusion 


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© Higher Education Press and Springer-Verlag Berlin Heidelberg 2016

Authors and Affiliations

  1. 1.Department of Orthopedic Trauma, Affiliated General HospitalNingxia Medical UniversityYinchuanChina
  2. 2.State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and EngineeringTsinghua UniversityBeijingChina

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