A Significant Improvement in Mechanical Properties of near Eutectic Nb-Si Alloys

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In this paper, a significant improvement in mechanical and oxidation properties of near eutectic Nb–Si alloys by the addition of aluminum (Al) and control of microstructural length scale were studied. A comparative study of two alloys Nb-18.79at%Si and Nb-12.3at%Si-9at%Al were carried out. Compression test yields the ultimate strength of 1.8±0.1 GPa and engineering strain of 2.3±0.03%. In comparison, the binary Nb-18.79 at% Si alloy possesses an ultimate strength of 1.35±0.1 GPa and strain of 0.2±0.01% when processed under identical conditions. The indentation fracture toughness of Al containing suction cast alloy shows a value of 20.2±0.5 MPa which represents a major improvement over bulk Nb–Si eutectic alloy

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Edited by:

David M. Batisdas and Y.Q. Chang

Pages:

789-793

Citation:

Y. J. Jiang, "A Significant Improvement in Mechanical Properties of near Eutectic Nb-Si Alloys", Advanced Materials Research, Vol. 668, pp. 789-793, 2013

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March 2013

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[1] B.P. Bewlay, M.R. Jackson, H.A. LipsittMetall. Mater. Trans. A, 27 (1996), p.3801.

[2] T.E. Kim, J.M. Park, U. Kühnb, J. Eckert, D.H. Kim Mater. Sci. Eng. A, 531 (2012), p.51.

[3] C.L. BriantJ. Engg. Mater. Tech. (Trans. ASME), 122 (2000), p.338.

[4] J. Geng, P. Tsakiropoulos Intermetallics, 15 (2007), p.382.

[5] G. Shao Intermetallics, 12 (2004), p.655.

[6] Haruyuki S., Tomokazu S., Ryuuichi M., Hiroyuki U., United States Patent 6311758.

[7] S. Kashyap, C.S. Tiwary, K. Chattopadhyay Intermetallics, 19 (2011), p. (1943).

[8] ASTM D792-00 Standard Test Methods for Density and Specific Gravity (Relative Density) of Plastics by Displacement ASTM International.

[9] L. Zifu, P. Tsakiropoulos Intermetallics, 18 (2010), p.1072.

[10] N. Vellios, P. Tsakiropoulos Intermetallics, 18 (2010), p.1729.

[11] N. Vellios, P. Tsakiropoulos Intermetallics, 15 (2007), p.1529.

[12] N. Vellios, P. Tsakiropoulos Intermetallics, 15 (2007), p.1518.

[13] Y. Wang, D. Banerjee, C.C. Su, A.G. Khachaturyan Acta Mater., 46 (1998), p.2983.

[14] E. Nes Acta Metall., 20 (1972), p.499.