STUDY ON THE CHROME INFLUENCE ON THE MECHANICAL PROPERTIES AND MICROSTRUCTURE OF THE TUNGSTEN BASED ALLOYS

Radu MUREŞAN

Abstract


In this paper we have presented the studies and the researches done by the authors on the chrome addition effect on the mechanical properties and microstructure of the heavy alloys from the W-Ni-Fe system. The experimental results have shown that the chrome addition up to 3 wt. % in the W-Ni-Fe system, have influenced the density, elongation and the yield limit of the sintered samples. These results could be explained by the segregation observed on the interphase boundaries between the W based matrix and the chromium compounds with the Ni, Fe and O elements. Also, an interphase corrosion is produced from where is explained the lowering of the mechanical properties analyzed.

Key words: Tungsten heavy alloy (THA); W-Ni-Fe composites; liquid phase sintering (LPS); sintering atmosphere

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References


Bose, A. and German R.M: 1990 Metall. Trans, A21 1325.

Wu, Y., Bollina, R,:Materials Science and Engineering A 344, 2003.

O.J. Kwon and D.N. Yoon: Sintering Process, G.C. Kuczynski, ed., Plenum Press, New York, NY, 1980, p. 203-218.

S.J. Cho, S.J. Kang and D.N. Yoon: Journal Materials Scientifics, 1983, p. 1374-1380.

H.H. Park, O.J. Kwon and D.N. Yoon: Mettal. Trans. A, 1986, vol. 17 A, p. 1915-1919.

V. Brozek, J. Matejicek, K., Neufuss: Book of Abstracts 17th IPSC, Toronto, pp. 944-945, 2005.

N. Kaan Caliscan, M. Kaan Pehlivanouglu: A. Sakir Bor, Effect of composition on the sintering Behavior and Microstructure of W(90wt%)-Ni-Cu Alloys, International Power metallurgy Congress Et Exhibition, 17-19 October, Toulouse, France, Vol.3, pp.431-436, 2007.

X. Gong, J. L. Fan, F. Ding, M. Song, and B. Y. Huang, “Effect of tungsten content on microstructure and quasi-static tensile fracture characteristics of rapidly hot-extruded W-Ni-Fe alloys,” International Journal of Refractory Metals and Hard Materials, vol. 30, no. 1, pp. 71–77, 2012.

J. L. Fan, X. Gong, B. Y. Huang, M. Song, T. Liu and M. G. Qi, “Dynamic Failure and Adiabatic Shear Bands in Fine Grain 93W-4.9Ni-2.1Fe Alloy with Y2O3 Addition under Lower High-Strain-Rate, (HSR) Compression,” Mechanics of Materials, Vol. 42, No. 1, 2010, pp. 24-30.

W. Zhou, X. Gao, Y.-G. Zhou, F.-H. Luo

Mater. Sci. Eng. Powder Metall., 15 (2010), pp. 141–144

R. M. German, P. Suri, and S. J. Park, “Review: liquid phase sintering,” Journal of Materials Science, vol. 44, no. 1, pp. 1–39, 2009.

J. Das, U. R. Kiran, A. Chakraborty, and N. E. Prasad, “Hardness and tensile properties of tungsten based heavy alloys prepared by liquid phase sintering technique,” International Journal of Refractory Metals and Hard Materials, vol. 27, no. 3, pp. 577–583, 2009.

R. Muresan, Thesis, Tehnical University of Cluj-Napoca, 2000.

J. Das, G. A. Rao, and S. K. Pabi, “Microstructure and mechanical properties of tungsten heavy alloys,” Materials Science and Engineering A, vol. 527, no. 29-30, pp. 7841–7847,2010.


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