Nanostructure Formation and Amorphization in Intermetallic Compounds by Severe Plastic Deformation

Abstract:

Process of nanostructure formation and amorphization by high pressure torsion (HPT) were studied for various intermetallic compounds. In ZrCu after HPT deformation, optical microscopy revealed that numerous shear bands formed running nearly parallel to the shear direction. Partial amorphization was confirmed by X-ray diffraction and TEM observations. Detailed TEM observations revealed localized amorphization within the nano-scale shear bands. For HPT deformation of zone-melted Zr50Cu40Al10 the preferential amorphization of ZrCu phase was observed. On the contrary, amorphization was not observed for Ni3Al even after HPT deformation of 100 turns; the sample remained to be disordered nanocrystalline of about 50 nm. The process and mechanism of the grain refinement and amorphization will be compared and discussed for these intermetallic compounds.

• Periodical: Materials Science Forum (Volumes 667-669)
• Pages: 17-24
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.667-669.17
• Online since: December 2010
• Authors: Koichi Tsuchiya, Octav Ciuca
• Keywords: Twinning, Amorphous, Nanocrystalline, Ni₃Al, Shear Band, ZrCu

References

[1] K. Tsuchiya, T. Waitz, T. Hara, H. P. Karnthaler, Y. Todaka and M. Umemoto: 14th European Microscopy Congress 'EMC2008), (Springer, 2008), 385.

DOI: 10.1007/978-3-540-85226-1_193

[2] S. -M. Sharma and S. K. Sikka: Prog. Mater. Sci. Vol. 40 (1996) 1.

[3] P. R. Okamoto, N. Q. Lam and L. E. Rehn: Solld State Phys. Vol. 52 (1998) 1.

[4] J. Koike and D. M. Parkin: J. Mater. Res. Vol. 5 (1990) 1414.

[5] H. Nakayama, K. Tsuchiya, Z. -G. Liu, M. Umemoto, K. Morii and K. Shimizu: Mater. Trans. Vol. 42 (2001) (1987).

[6] H. Nakayama, K. Tsuchiya and M. Umemoto: Scripta Mater. Vol. 44 (2001) 1781.

[7] D. M. Grant, S. M. Green and J. V. Wood: Acta Metall. Mater. Vol. 43 (1995) 1045.

[8] K. Tsuchiya, H. Nakayama, Y. Todaka, M. Umemoto and K. Morii: J. Metastable Nanocrys. Mater. Vol. 24-25 (2005) 625.

[9] A. V. Sergueeva, C. Song, R. Z. Valiev and A. K. Mukherjee: Mater. Sci. Eng. Vol. A339 (2003) 159.

[10] T. Waitz: Acta Mater. Vol. 53 (2005) 2273.

[11] T. Waitz, V. Kazykhanov and H. P. Karnthaler: Acta Mater. Vol. 52 (2004) 137.

[12] K. Tsuchiya, Y. Hada, T. Koyano, K. Nakajima, M. Ohnuma, T. Koike, Y. Todaka and M. Umemoto: Scripta Mater. Vol. 60 (2009) 749.

DOI: 10.1016/j.scriptamat.2008.12.058

[13] Y. Yokoyama, Y. Akeno, T. Yamasaki, P. K. Liaw, R. A. Buchanan and A. Inoue: Mater. Trans. Vol. 46 (2005) 2755.

[14] A. Inoue, W. Zhang, T. Tsurui, A. R. Yavari and A. L. Greer: Philos. Mag. Lett. Vol. 85 (2005) 221.

[15] Y. Yokoyama, K. Fukaura and A. Inoue: Materials Science and Engineering A Vol. 375-377 (2004) 427.

[16] C. Rentenberger and H. P. Karnthaler: Acta Mater. Vol. 53 (2005) 3031.

[17] J. Langullaume, F. Chmelik, G. Kapelski, F. Bordeaux, A. A. Nazarov, G. Canova, C. Esling, R. Z. Vaiev and B. Baudelet: Acta Metall. Mater. Vol. 41 (1993) 2953.

DOI: 10.1016/0956-7151(93)90110-e

[18] A. V. Korznikov, G. Tram, O. Dimitrov, G. F. Korznikova, S. R. Idrisova and Z. Pakiela: Acta Mater. Vol. 49 (2001) 663.

DOI: 10.1016/s1359-6454(00)00345-1

[19] Y. Todaka, J. Sasaki, T. Moto and M. Umemoto: Scripta Mater. Vol. 59 (2008) 2273.

[20] O. Ciuca, K. Tsuchiya, Y. Yokoyama, Y. Todaka and M. Umemoto: Mater. Trans. Vol. 51 (2010) 14.

[21] O. Ciuca, K. Tsuchiya, Y. Yokoyama, Y. Todaka and M. Umemoto: Mater. Trans. Vol. 50 (2009) 1123.

[22] L. Kovarik, R. R. Unocic, J. Li, P. Sarosi, C. Shen, Y. Wang and M. J. Mills: Prog. Mater. Sci. Vol. 54 (2009) 839.

[23] M. Kolbe: Materials Science and Engineering A Vol. 319-321 (2001) 383.

[24] A. R. Kilmametov, G. Vaughan, A. R. Yavari, A. LeMoulec, W. J. Botta and R. Z. Valiev: Materials Science and Engineering A Vol. 503 (2009) 10.

DOI: 10.1016/j.msea.2008.11.023

[25] K. Aoki and O. Izumi: J. Japan Inst. Metals Vol. 43 (1979) 358.

[26] K. Aoki and O. Izumi: J. Jpn. Inst. Metals (in Japanese) Vol. 43 (1979) 1190.