Mechanical Properties of Equal Channel Angular Extruded Magnesium Boride (MgB2) Powder in Tubes (PITs)


Article Preview

The MgB2 PITs, prepared by filling Fe tubes with MgB2 as a core, were processed through different number of passes at room temperature via Routes A, BA, C and BC. The mechanical properties of the PITs were measured in terms of density and hardness. The extent of the compaction was also studied through shear punch test. The shape of the compacts remains circular even after four passes via Route C & BC. Higher density and hardness along with higher USS is observed from the PITs of Route C compared to Route BC. The PITs processed through Route A and Route BA did not show sufficient compaction to carryout the density measurements. Thus, the current study shows that Route C is the optimal route; to attain good mechanical properties in ECAE processed MgB2 PITs with Fe tube.



Materials Science Forum (Volumes 561-565)

Main Theme:

Edited by:

Young Won Chang, Nack J. Kim and Chong Soo Lee




A.V. Nagasekhar et al., "Mechanical Properties of Equal Channel Angular Extruded Magnesium Boride (MgB2) Powder in Tubes (PITs)", Materials Science Forum, Vols. 561-565, pp. 961-964, 2007

Online since:

October 2007




[1] J. Nagamatsu, N. Nakagawa, T. Murnaka, Y. Zenitani, J. Akimitsu: Nature 410 (2001) 63.

[2] Y. Takano, H. Takeya, A. Fujii, H. Kumakura, T. Hatano, K. Togano: Appl. Phys. Letters 78 (2001) 2914.

[3] H.A. Ma, X.P. Jia, L.X. Chen, P.W. Zhu, G.Z. Ren, W.L. Guo, X.Q. Fu, G.T. Zou, Z.A. Ren, G.C. Che, Z.X. Zhao: J. Physics: Cond. Matter 14 (2002) 11181.

[4] T.C. Shields, K. Kawano, D. Holdom, J.S. Abell: Supercond. Sci. Techol. 15 (2002) 202.

[5] S.S. Indrakanti, V.F. Nesterenko et al.: Condensed matter/0105485 (2001).

[6] V.F. Nesterenko: Condensed matter/0212543 (2002).

[7] H. Matsuzawa, H. Tamaki, W. Ohashi et al.: Physica C 412-414 (2004) 619.

[8] S.P. Ananev, V.A. Grinenko, V.E. Keilin et al.: Supercond. Sci. Techol. 17 (2004) S274.

[9] R.Z. Valiev, T.G. Langdon: Prog. Mater. Science 51 (2006) 881.

[10] H.S. Kim, M.H. Seo, C. S. Oh, S.J. Kim: Mater. Sci. Forum 437-438 (2003) 89.

[11] A.V. Nagasekhar, Y. Tick-Hon, K.S. Ramakanth: Appl. Phys. A 85 (2006)185.

[12] A.V. Nagasekhar, Y. Tick-Hon, H.P. Seow: Ultrafine Grain Materials IV, Edited by Y.T. Zhu, T.G. Langdon, Z. Horita, M.J. Zehetbauer, S.L. Semiatin, and T.C. Lowe. TMS (2006) 203.

[13] P. Quang, Y.G. Jeong, S.C. Yoon, S.H. Hong, H.S. Kim: J. Mater. Process. Technology 187- 188 (2007) 318.

[14] A.V. Nagasekhar: Equal channel angular extrusion of intermetallics, PhD Thesis (2007), Nanyang Technological University, Singapore.

[15] A.V. Nagasekhar, U. Chakkingal, P. Venugopal: J. Mater. Process. Technology 173 (2006) 53.

[16] M. Furukawa, Y. Iwahashi, Z. Horita, M. Nemoto, T.G. Langdon: Mater. Sci. Eng. A 257 (1998) 328.

[17] R.K. Guduru, K.A. Darling, R. Kishore, R.O. Scattergood, C.C. Koch, K.L. Murty: Mater. Sci. Eng. A 395 (2005) 307.

[18] R.K. Guduru, A.V. Nagasekhar, R.O. Scattergood, C.C. Koch, K.L. Murty: Metall. and Mater. Trans. A 37 (2006) 1477.