An Insight into the Effect of Deformation on Carbide Dissolution in the Band Structure of Bearing Steel

Abstract:

Dendritic segregation in deformed samples remains in the form of band structure, which is a high-strained region. The present work investigates the effect of the uphill diffusion process, occurring during deformation, on the dissolution of carbide particles in the band structure. A series of hot compression tests are performed on the cast structure of bearing steel by using a hydraulic testing machine, MTS 810. Cylindrical specimens are deformed in a temperature range of 800°C to 900°C and at strain rates of 5s^-1 and 0.5s^-1. In order to eliminate the recovery process, samples are immediately quenched after the compression. The microsegregation of Cr, Mo, Mn and Si are investigated in the band structure, which shows a tendency of uphill diffusion during deformation process. The results show that the volume fraction of carbides varies with the increased straining. The results also show that deformation causes the fragmentation, dispersion of pearlite in the dendrites and the dissolution of spheroidized carbides in the band structure.

• Periodical: Defect and Diffusion Forum (Volumes 334-335)
• Pages: 171-176
• DOI: https://doi.org/10.4028/www.scientific.net/DDF.334-335.171
• Online since: February 2013
• Authors: Mitra Basirat, Hasse Fredriksson
• Keywords: Carbide, Cast Structure, Diffusion, Plastic Deformation

References

[1] J.D. Verhoeven: J. Mat. Eng. Performance Vol. 9 (2000) p.286.

[2] R.A. Grange: Metall. Trans. Vol. 2 (1971) p.417.

[3] R. Grossterlinden , R. Kawalla , U. Lotter and H. Pircher: Steel Research Vol. 63 (1992) p.331.

[4] L. Hellneran, T.O. Norrman: J. Jernkont. Ann. Vol. 152 (1968) p.269.

[5] P. Malecki, E.W. Langer: Scandinavian J. Metall. Vol. 19 (1990) p.182.

[6] J. Ågren: Scandinavian J. Metall. Vol. 19 (1990) p.2.

[7] H.K.D.H. Bhadeshia: Progress in Materials Science Vol. 57 (2012) p.268.

[8] C.A. Stickels: Metall. Trans. Vol. 5 (1974) p.865.

[9] Yu. Ivanisenko, W. Lojkowski, R.Z. Valiev and H.J. Fecht: Acta Mat. Vol. 51 (2003) p.5555.

[10] W. Lojkowski, Yu. Ivanisenko and H.J. Fecht: Trans. Indian Inst. Met. Vol. 58 (2005) p.993.

[11] M. Basirat and H. Fredriksson Effect of Deformation on Microsegregation in Cast Structure of Bearing Steel, proceedings of the TMS conference, Orlando, March 11-15 (2012).

DOI: 10.1002/9781118357002.ch40

[12] J. Sarnet (Ph.D. Thesis, KTH Royal Institute of Technology, 2009).

[13] A.R. Marder and A.O. Benscoter: Metall. Trans. Vol. 1 (1970) p.3234.

[14] H. Fredriksson, M. Hadda Sabzevar, K. Hansson and J. Kron: Mater. Sci. Tech. Vol. 21 (2005) p.521.

[15] K. Hansson, H. Fredriksson: Adv. Eng. Mater. Vol. 5 (2003) p.66.

[16] M. Basirat and H. Fredriksson: submitted to Int. J. Mater. Sci. (IJOMS) (2012).