Journals →  Tsvetnye Metally →  2015 →  #8 →  Back

ArticleName Selective laser melting of titanium alloy and manufacturing of gas-turbine engine part blanks
DOI 10.17580/tsm.2015.08.11
ArticleAuthor Sufiyarov V. Sh., Popovich A. A., Borisov E. V., Polozov I. A.

Peter the Great St. Petersburg Polytechnic University, Saint Petersburg, Russia:

V. Sh. Sufiiarov, Leading Researcher, e-mail:
A. A. Popovich, Professor, Director of Institute of Metallurgy, Mechanical Engineering and Transport
E. V. Borisov, Researcher, Post-Graduate Student
I. A. Polozov, Engineer, Student


Additive manufacturing (in particular, selective laser melting (SLM)) is a prospective technology for manufacturing of geometrically complex parts. This technology is especially attractive for aircraft industry, where titaniumbased alloys are widely used. This paper shows the results of the study of Ti – 6Al – 4V alloy powder, which was used for manufacturing of bulk specimens and gas-turbine engine workpiece by SLM. There was carried out the investigation of influence of heat treatment on microstructure and mechanical properties of specimens. Initial powder material is characterized by spherical form of particles with some satellites and consists mainly of martensitic α'-phase. Microstructure of bulk specimens after SLM is martensitic α'-phase in the form of fine-dispersed acicular precipitates. Ultimate tensile strength before heat treatment was 1160 MPa, however elongation was 3.8%. As a result of heat treatment, partial deformation of martensitic phase occurred, which led to increasing material elongation (up to 9.9%), keeping ultimate tensile strength at a high level (1090 MPa). Obtained mechanical properties after heat treatment correspond to American additive manufacturing standard ASTM F2924–14 for Ti – 6Al – 4V alloy. Fractography of specimens showed that fracture type may be characterized as ductile with local elements of brittle fracture, since there are dimples on the fracture surface, typical for ductile fracture, however there are micropores with some unmolten powder particles.

keywords Powder metallurgy, additive manufacturing, selective laser melting, titanium-based alloy, laser additive manufacturing

1. Chester T. Sims, Norman S. Stoloff, William C. Hagel. Supersplavy II: Zharoprochnye materialy dlya aerokosmicheskikh i energeticheskikh ustanovok (Superalloys II: Heat-resistant materials for aerocosmic and energetic units). Moscow : Metallurgiya, 1995. 385 p.
2. Zlenko M. A., Popovich A. A., Mutylina I. N. Additivnye tekhnologii v mashinostroenii (Additive technologies in machine-building). Saint Petersburg : Publishing House of Polytechnical University, 2013. 222 p.
3. Sufiiarov V. Sh., Popovich A. A., Borisov E. V., Polozov I. A. Selektivnoe lazernoe plavlenie zharoprochnogo nikelevogo splava (Selective laser melting of heat-resistant nickel alloy). Tsvetnye Metally = Non-ferrous metals. 2015. No. 1. pp. 79–83.
4. Chlebus E., Kuźnicka B., Kurzynowski T., Dybała B. Microstructure and mechanical behaviour of Ti–6Al–7Nb alloy produced by selective laser melting. Materials Characterization. 2011. Vol. 62, No. 5. pp. 488–495.
5. Attar H., Calin M., Zhang L. C., Scudino S., Eckert J. Manufacture by selective laser melting and mechanical behavior of commercially pure titanium. Materials Science and Engineering: A. 2014. Vol. 593. pp. 170-177.
6. Vrancken B., Thijs L., Kruth J. P., Van Humbeeck J. Heat treatment of Ti6Al4V produced by selective laser melting: microstructure and mechanical properties. Journal of Alloys and Compounds. 2012. Vol. 541. pp. 177–185.
7. Vilaro T., Colin C., Bartout J. D. As-fabricated and heat-treated microstructures of the Ti – 6Al – 4V alloy processed by selective laser melting. Metallurgical and Materials Transactions A. 2011. Vol. 42, No. 10. pp. 3190–3199.
8. Facchini L., Magalini E., Robotti P., Molinari A., Ho..ges S., Wissenbach K. Ductility of a Ti – 6Al – 4V alloy produced by selective laser melting of prealloyed powders. Rapid Prototyping Journal. 2010. Vol. 16, No. 6. pp. 450–459.
9. GOST 10157–79. Argon gazoobraznyy i zhidkiy. Tekhnicheskie usloviya (State Standard 10157–79. Gaseous and liquid argon. Technical requirements). Introduced: 1980–07–01. (in Russian).
10. GOST 25849–83. Poroshki metallicheskie. Metod opredeleniya formy chastits (State Standard 25849-83. Metallic powders. Method of definition of particle shape). Introduced: 1984–01–01. (in Russian).
11. GOST 1497–84. Metally. Metody ispytaniy na rastyazhenie (State Standard 1497–84. Metals. Pull test methods). Introduced: 1986–01–01. (in Russian).
12. GOST 9651–84. Metally. Metody ispytaniya na rastyazhenie pri povyshennykh temperaturakh (State Standard 9651-84. Metals. Pull test methods with increased temperatures). Introduced: 1986–01–01. (in Russian)
13. GOST 9454–78. Metally. Metody ispytaniya na udarnyy izgib pri ponizhennykh, komnatnoy i povyshennykh temperaturakh (State Standard 9454–78. Impact bending tests with high, room and low temperatures). Introduced: 1979–01–01. (in Russian).
14. ASTM F2924-14. Standard Specification for Additive Manufacturing Titanium-6 Aluminum-4 Vanadium with Powder Bed Fusion.
15. EOS. EOS Titanium Ti64. Available at:
16. SLM Solutions. SLM materials. Discover the variety. Available at:

Language of full-text russian
Full content Buy