High Performance Titanium Alloy Compacts by Advanced Powder Processing Techniques

Abstract:

In this paper, two kinds of advanced powder processing techniques such as Metal Injection Molding (MIM) and Direct Laser Forming (DLF) were introduced to fabricate complex shaped Ti alloy parts which have been widely used for various industrial and medical applications because of their excellent characteristics of low density, high corrosion resistance and high biocompatibility but need high processing cost because of poor workability. The MIM process has been tried to strengthen Ti-6Al-4V alloy compacts by addition of fine Mo, Fe and Cr powders, and enhanced tensile strength of 1030 MPa with 15.1 % elongation was obtained by an addition of 4 mass%Cr because of the microstructural modification but also the solution strengthening in beta phase. DLF process has been tried to improve the honeycomb porous structure from Ti-6Al-7Nb powder material, and the honeycomb structure with 300 m holes showed good mechanical compatibility and superb biocompatibility in osteoblasts culturing.

• Periodical: Key Engineering Materials (Volume 520)
• Pages: 30-40
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.520.30
• Online since: August 2012
• Authors: Hideshi Miura, Hyun Goo Kang, Yoshinori Itoh
• Keywords: Biocompatibility, Direct Laser Forming, Mechanical Property, Metal Injection Molding (MIM), Ti Alloys

References

[1] Itoh Y., Harikou T., Sato K., and Miura H., Improvement of Ductility for Injection Moulding Ti-6Al-4V Alloy, Proceedings, 2004 Powder Metallurgy World Congress, 4 (2004-10) 445-450.

[2] Itoh, Y., Harikou, T., Sato, K., and Miura, H., Fabrication of Near-α Titanium Alloy by Metal Injection Molding, Journal of the Japan Society of Powder and Powder Metallurgy, 52 (2005) 43-48.

DOI: 10.2497/jjspm.52.43

[3] Itoh, Y., Uematsu, T., Sato, K., Miura, H., and Niinomi, M., Fabrication of High Strength α+β type Titanium Alloy Compacts by Metal Injection Molding, Journal of the Japan Society of Powder and Powder Metallurgy, 55(2008)720-725.

DOI: 10.2497/jjspm.55.720

[4] Itoh, Y., Uematsu, T., Sato, K., Miura, H., Niinomi, M., and Ikeda, M., Sintering Behavior and Mechanical Properties of Injection Molded Ti-4. 3Fe-7. 1Cr Alloys, Journal of the Japan Society of Powder and Powder Metallurgy, 53 (2006) 821-826.

DOI: 10.2497/jjspm.53.821

[5] Itoh, Y., Miura, H., Uematsu, T., Sato, K., Niinomi, M., and Ozawa, T., Effect of Mixed Powders on the Properties of Ti-6Al-7Nb Alloy by Metal Injection Molding, Ti-2007 Science and Technology, The Japan Institute of Metals, 2 (2007) 1185-1188.

DOI: 10.4028/www.scientific.net/msf.534-536.357

[6] Itoh, Y., Uematsu, T., Sato, K., Miura, H., and Niinomi, M., Microstructural Modification for Injection Molded Ti-6Al-4V Alloys by Addition of Mo Powder, Journal of the Japan Society of Powder and Powder Metallurgy, 53 (2006) 750-754.

DOI: 10.2497/jjspm.53.750

[7] Boyer, R., Welsch, G., and Collings, E.W., Materials Properties Handbook: Titanium Alloys, ASM International, 1994, p.10.

[8] Chua C.K., Leong K.F. and Lim C.S.: Rapid Prototyping: Principles and Applications 2nd ed., World Scientific Publishing, Singapore, (2003).

[9] M.M. Dewidar, K.A. Khalil and J.K. Lim, Processing and mechanical properties of porous 316L stainless steel for biomedical applications, Trans. Nonferrous Metals Society of China, 17 (2007) 468-473.

DOI: 10.1016/s1003-6326(07)60117-4

[10] H. Miura, H. Maeda, M. Uemura, T. Takemasu and M. Otsu, Establishment of Laser Sintering Technique for Titanium Powder, Mater. Sci. Forum, 534-536 (2007) 465-468.

DOI: 10.4028/www.scientific.net/msf.534-536.465

[11] Hideshi Miura, Kenta Okawachi, Hyun Goo Kang, Makoto Uemura, Makoto Fujita and Nobuhiro Arimoto, Proc. Powder Metallurgy & Particulate Materials (2009), CD-ROM.

[12] Itoh, Y., Uematsu, T., Sato, K. and Miura, H., Effect of Oxygen content and Relative Density on the Tensile Properties of Injection Molded Ti-6Al-4V alloy, Journal of the Japan Society of Powder and Powder Metallurgy, 56 (2009) 259-263.

DOI: 10.2497/jjspm.56.259

[13] Japan Society of Mechanical Engineering: Biomechanics Series – Biomaterials, Ohmsha, Tokyo, 1991, 75-86.

[14] D. A. Hollander, m. von Walter, T. Wirtz and R. Sellei, Biomaterials, 27 (2006) 955-963.