Gradient Microstructure of FeCr30Co8 Hard Magnetic Alloy Subjected to Plastic Deformation by Tension Combined with Torsion at 700 and 720°C

Abstract:

The article presents the results of microstructure evolution studies of the FeCr30Co8 hard magnetic alloy, subjected to deformation by tension and torsion at 700 and 720 °C. The observations in the longitudinal section of the samples in the scanning electron microscope (SEM) showed a formation of gradient microstructure with the maximum grain refinement in the surface layer of the material. The EBSD examination confirmed the refinement of structure in the surface layer and the presence of sub-grained structure of the material. A little larger refinement of α phase grains was observed at temperature of deformation 700 °C than at 720 °C. However, the deformation was inhomogeneous along the whole longitudinal section of the sample. The highest deformation degree resulted from the torsion.

• Periodical: Solid State Phenomena (Volume 186)
• Pages: 116-119
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.186.116
• Online since: March 2012
• Authors: Anna Korneva
• Keywords: Gradient Microstructure, Hard Magnetic Alloy, High Temperature Deformation, SEM/EBSD

References

[1] A. V. Korznikov: Structure and Mechanical Properties of Metals and Alloys Subjected to Severe Plastic Deformation, Habilitation Thesis, IPMS Ufa, Russia, 2000 (in Russian).

[2] X. Y. Sun, C. Y. Xu, L. Zhen, R. S. Gao, R. G. Xu: J Magn Magn Mater. 283 (2004), 231-237.

[3] H. Gleiter: Acta Mater. 48 (2000), 1-29.

[4] G. V. Korznikova, A. V. Korneva, Z. Pakiela, A. V. Korznikov: Phys Met. Metall. 94 (2002) 69-74.

[5] O. A. Kajbyshev, R.A. Vasin, V.K. Berdin, R.M. Kashaev: Kuznechno shtampowoe proizwodstwo 4 (1999) p.8 (in Russian).

[6] A. Korneva, M. Bieda, G. Korznikova, K. Sztwiertnia: Inter. J. Mater. Res. 9 (2008), 991-998.

[7] A. Korneva, M. Bieda, G. Korznikova, A. Korznikov, K. Sztwiertnia: Inter. J. Mater. Res. 1 (2011), 32-39.