Nanoparticulate-Reinforced Ti-Base Composites Prepared by Laser Cladding

Abstract:

With preplaced Ti-8Al-1Mo-1V + BN powder mixtures, the Ti-base composite coatings with in-suit synthesis nano particulates were obtained by laser cladding on titanium alloy substrate. The microstructures, fracture morphology, phase composition and mechanical property were studied by SEM, XRD and micro-hardness tests. The results show that, there are two kinds of typical nano particulates in the composites, i.e. the TiB with a diameter of ~400nm and the _Ti2N with a diameter of ~10 nm. Both the TiB and Ti2N reinforced particulates are uniformly distributed in the composites. As a result, the average hardness of the composites were ~360HV0.05 which is about 20% higher than the substrate. In the composites, the distribution of _Ti2N particulates shows a peculiar characteristic of dendrite-like morphologies. The analysis shows that the _Ti2N precipitates out from the solid state α-Ti(N) is the reason why Ti2N is only of a diameter of ~10nm and distributes in a certain way of dendrite-like morphologies.

• Periodical: Advanced Materials Research (Volume 497)
• Pages: 311-314
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.497.311
• Online since: April 2012
• Authors: Wei Fu Wang
• Keywords: In Suit, Laser Cladding, Nano Particulate, Ti-Base Composites

References

[1] L. Geng, D.R. Ni and Z.Z. Zheng: Acta Materiae Compositae Sinica Vol. 23 (2006), p.1 (In Chinese).

[2] L.F. Chen, Y. Liu, H.P. Tang, H.Y. Liu and Y.P. Huang: Rare Metal Materials and Engineering Vol. 34 (2005), p.1609 (In Chinese).

[3] D.E. Alman and J. A Hawk: Wear Vol. 225 (1999), p.629.

[4] P.A. Xiao, X.H. Qu, C.M. Lei, B.J. Zhu, M.L. Qin and P.Y. Huang: Materials Science and Engineering of Powder Metallargy Vol. 6 (2001), p.279 (In Chinese).

[5] S. Gorsse, J.P. Chaminade and Y. Le-Petitcorps: Composites Part A: Applied Science and Manufacturing Vol. 29 (1998), p.1229.

DOI: 10.1016/s1359-835x(98)00080-3

[6] D. Eylon, S. Fujishiro, P.J. Postans and F.H. Froes: Journal of Metals Vol. 36 (1984), p.55.

[7] J.H. Abboud and D.R.F. West: Journal of Materials Science Letters Vol. 11 (1992), p.1675.

[8] E. Paransky, E.Y. Gutmanas, I. Gotman and M. Koczk: Metallurgical and Materials Transactions A Vol. 27 (1996), p.2130.

[9] B.S. Yilbas, M.S.J. Hashmi and S.Z. Shuja. Surface and Coatings Technology, Vol. 140 (2001), p.244.

[10] M.X. Xia, R. Hu, J.S. Li, X.Y. Xue, Y.C. Wang and L. Zhou: Materials Review Vol. 21 (2007), p.424 (In Chinese).

[11] Y.S. Tian, C.Z. Chen, D.Y. Wang, Y. Xu, and T. Q Lei: Laser Technology Vol. 29 (2005), p.113 (In Chinese).