Paper Titles
Novelties in Physics of Explosive Welding and Powder Compaction
p.135
Processing of Advanced Materials Using Conventional and Shock Techniques
p.141
Explosive Cladding for ITER Components
p.149
A DTA Study on HVOF Thermally Sprayed WC–M Coatings
p.155
Study of Phase Transformations in Heat Treatment of HVOF Thermally Sprayed WC–17Co Coating
p.161
On Micro Forming by Hydro Spark Forming Method
p.167
Control of Onset of Buckling Lobe in Axial Impact of Square Tube
p.173
Dependence of Blast Attenuation on Weight of Barrier Materials
p.179
Underground Space Construction by Explosive Loading in a Borehole
p.185

Study of Phase Transformations in Heat Treatment of HVOF Thermally Sprayed WC–17Co Coating

Article Preview

Abstract:

In this work, WC-17Co powder was thermally sprayed onto mild steel using HVOF spray technique. The coated specimen was heat treated at 1100°C in a vacuum chamber and was then studied by using transmission electron microscopy (TEM). Post heat treatment resulted in recrystallization of the amorphous phase, formed during thermal spraying, into low carbon eta phase like Co6W6C. TEM results of the heat treated specimens showed that these new nucleated eta phases had very clear crystallographic structure without any crystalline defects. Heat treatment could also transform high carbon carbides like WC and W2C in the as sprayed samples to high carbon eta phases like Co3W3C. High density of dislocations and staking faults noticed in TEM of these phases might be an indication of possible shear mechanism in formation of these carbides.

You might also be interested in these eBooks
Explosion, Shock Wave and Hypervelocity Phenomena in Materials II View Preview

Info:

Periodical:

Materials Science Forum (Volume 566)

Pages:

161-166

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.566.161

Citation:

Cite this paper

Online since:

November 2007

Authors:

Shahin Khameneh Asl, M. Heydarzadeh Sohi, Kazuyuki Hokamoto, Mitsuhiro Matsuda, Ryuichi Tomoshige, Minoru Nishida

Keywords:

Heat Treatment, HVOF, TEM, WC-17Co

Export:

RIS, BibTeX

Price:

Permissions CCC:

Request Permissions

Permissions PLS:

Request Permissions

Сopyright:

© 2008 Trans Tech Publications Ltd. All Rights Reserved

Share:

Citation:

References

[1] V. V. Sobolev, J. M. Guilemany and J. Nutting: High Velocity Oxy-Fuel Spraying, (Woodhead Publishing Limited, Cambridge, England, 2004).

Google Scholar

[2] Sh. Khameneh Asl: Study of the Effect of the Alloying Element and Heat Treatment on the Properties of Thermally Sprayed WC-M Coatings, (Ph.D. Thesis, University of Tehran, Iran, 2005).

Google Scholar

[3] S. DePalo, M. Mohanty, H. Marc-Chartes and M. Dorfman, ITSC 2000, Montreal, Ed. C. C. Berndt, ASM Intl.

Google Scholar

[4] R. J. K. Wood, B. G. Mellor and M. L. Binfield, Wear Vol. 211 (1997), pp.70-83.

Google Scholar

[5] Q. Yang, T. Senda and A. Ohmorib, Wear Vol. 254 (2003), pp.23-34.

Google Scholar

[6] H. Lia, K.A. Khora, L.G. Yua, P. Cheang, Surface & Coatings Technology Vol. 194(2005), pp.96-102.

Google Scholar

[7] W. J. Lenling, M. F. Smith and J. A. Henfling, Proceeding of the Third National Thermal Spray Conference, Long Beach, CA, USA, (1990), pp.227-232.

Google Scholar

[8] J. S. Babai: (Ph.D. Dissertation, School of Mechanical and Manufacturing Engineering in Dublin City University, 2003).

Google Scholar

[9] J.M. Guilemany, J.M. de Paco, J. Nutting, and J.R. Miguel, Metallurgical and Materials Transactions A Vol. 30(1999), p.1913-(1921).

Google Scholar

[10] C. Verdon, A. Karimi and J. L. Martin, Materials Science and Engineering, Vol. A246(1998), pp.11-24.

Google Scholar

[11] J. E. Nerz, B. A. Kushner, Jr. and A. J. Rotolico, ASM International, Proceeding of the Fourth National Thermal Spray Conference, Pittsburgh, PA, USA, (1991), pp.115-120.

Google Scholar

[12] L. Chen and W. Lengauer, International Journal of Refractory Metals and Hard Materials Vol. 18(2000), pp.307-322.

Google Scholar

[13] Sh. Khameneh Asl, M. Heydarzadeh Sohi, S. M. M. Hadavi, Materials Science Forum, Vol. 465-466(2004), pp.427-466.

DOI: 10.4028/www.scientific.net/msf.465-466.427

Google Scholar

[14] Sh. Khameneh Asl, M. Heydarzadeh Sohi, Materials Science Forum, Vol. 465-466(2004), pp.301-306.

Google Scholar

[15] Sh. Khameneh Asl, M. Heydarzadeh Sohi, K. Hokamoto, M. Uemura, Wear 260 (2006) 1203- 1208.

DOI: 10.1016/j.wear.2005.07.013

Google Scholar

[16] C.J. Li, A. Ohmori, Y. Harada, Journal of Thermal Spray Technology, Vol. 5(1996), pp.69-73.

Google Scholar