Microstructure Evolution of Laser Direct Deposited Ti-5Al-2Sn-2Zr-4Mo-4Cr Titanium Alloy

Abstract:

In the present study, Ti-5Al-2Sn-2Zr-4Mo-4Cr titanium alloy was fabricated by laser direct deposition technology. Microstructure of the laser deposited Ti-5Al-2Sn-2Zr-4Mo-4Cr titanium alloy was characterized by optical microscopy (OM) and scanning electron microscopy (SEM). The laser deposited alloy has two types of periodic banded feature induced by the different stages of the thermal cycles during the laser deposition process. Moreover, microstructure evolves from the bottom to top of the laser deposited sample, and the mechanism of which is demonstrated.

• Periodical: Materials Science Forum (Volume 789)
• Pages: 436-442
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.789.436
• Online since: April 2014
• Authors: Yu Dai Wang*, Shuai Jiang, Fan Sun, Huai Xue Li, Mei Sun
• Keywords: Laser Direct Deposition, Microstructure, Titanium Alloy

References

[1] China Aeronautical Materials Handbook Editorial Board (eds.), China Aeronautical Materials Handbook, vol.4, Standards Press of China, Beijing, 2002, pp.179-187.

[2] F.G. Arcella, F.H. Froes, Producing titanium aerospace components from powder using laser forming, JOM Journal of the Minerals, Metals and Materials Society, 52(2000) 28-30.

DOI: 10.1007/s11837-000-0028-x

[3] H.M. Wang, S.Q. Zhang, X.M. Wang, Progress and challenges of laser direct manufacturing of large titanium structural components, Chinese Journal of Lasers. 36(2009) 3204-3209.

DOI: 10.3788/cjl20093612.3204

[4] P.A. Kobryn, E.H. Moore, S.L. Semiatin, The effect of laser power and traverse speed on microstructure, property, and build height in laser-deposited Ti-6Al-4V, Scripta Materialia. 43(2000) 299-305.

DOI: 10.1016/s1359-6462(00)00408-5

[5] X.H. Wu, J. Liang, J. Mei, C. Mitchell, P.S. Goodwin, W. Voice, Microstructures of laser-deposited Ti-6Al-4V, Materials and Design. 25(2004) 137-144.

DOI: 10.1016/j.matdes.2003.09.009

[6] S.M. Kelly, S.L. Kampe, Microstructural evolution in laser-deposited multilayer Ti-6Al-4V builds: part I. microstructural characterization, Metallurgical and Materials Transactions A. 35(2004) 1861-1867.

DOI: 10.1007/s11661-004-0094-8

[7] Y. Lu, H.B. Tang, Y.L. Fang, D. Liu, H.M. Wang, Microstructure evolution of sub-critical annealed laser deposited Ti-6Al-4V alloy, Materials & Design, 37 (2012) 56-63.

DOI: 10.1016/j.matdes.2011.12.016

[8] J. Wang, J. Chen, Y. Liu, X. Zhao, F. Zhang, W. Huang, Research on microstructure of TC17 titanium alloy fabricated by laser solid forming, Chinese Journal of Lasers. 37(2010) 847-851.

DOI: 10.3788/cjl20103703.0847

[9] X.M. Sun, D. Liu, H.B Tang, H.M. Wang, Solid-state phase transformation and microstructure of laser direct manufactured TC17 titanium alloy components, Rare Metal Materials and Engineering. 42 (2013) 724-729.

[10] M.L. Griffith, M.E. Schlienger, L.D. Harwell, M.S. Oliver, M.D. Baldwin, M.T. Ensz, M. Essien, J. Brooks, C.V. Robino, J.E. Smugeresky, W.H. Hofmeister, M.J. Wert, D.V. Nelson, Understanding thermal behavior in the LENS process, Materials & Design. 20(1999) 107-113.

DOI: 10.1016/s0261-3069(99)00016-3

[11] L. Costa, R. Vilar, T. Reti, A.M. Deus, Rapid tooling by laser powder deposition: process simulation using finite element analysis, Acta Materialia. 53(2005) 3987-3999.

DOI: 10.1016/j.actamat.2005.05.003