Microstructural Evolution of Body-Centred Cubic Fe-Al Alloy by Friction Stir Processing with SiC Particles Addition

Abstract:

The surface of body-centred cubic Fe-7Al (mass%) alloy plate was successfully modified by friction stir processing with SiC particles addition. The stir zone with SiC addition had an average grain size of 5.9 μm, smaller than that of 10.1 μm in the stir zone without SiC addition. SiC particles introduced by friction stir processing were converted to fine Fe₃AlC_x particles by reaction with the ferrite matrix. The hardness near the surface of the stir zone was significantly increased to 351 HV by introduction of particles, compared to the hardness of 200 HV in the stir zone without particles addition. The dispersed particles also contributed to suppression of grain growth of the matrix at elevated temperature.

• Periodical: Materials Science Forum (Volumes 838-839)
• Pages: 326-331
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.838-839.326
• Online since: January 2016
• Authors: Toru Nagaoka*, Yoshihisa Kimoto, Hiroyuki Watanabe, Masao Fukusumi, Yoshiaki Morisada, Hidetoshi Fujii, H.K.D.H. Bhadeshia
• Keywords: Carbide Particle, Friction Stir Processing, Microstructural Refinement

References

[1] W.M. Thomas, E.D. Nicholas, J.C. Needham, M.G. Murch, P. Temple-Smith, C.J. Dawes, International Patent Application (1991) No. PCT/GB92/02203.

[2] R.S. Mishra, Z.Y. Ma, Friction stir welding and processing, Mater. Sci. Eng. R 50 (2005) 1–78.

[3] R.S. Mishra, Z.Y. Ma, I. Charit, Friction stir processing: a novel technique for fabrication of surface composite, Mater. Sci. Eng. A 341 (2003) 307-310.

DOI: 10.1016/s0921-5093(02)00199-5

[4] Y. Morisada, H. Fujii, T. Nagaoka, M. Fukusumi, Effect of friction stir processing with SiC particles on microstructure and hardness of AZ31, Mater. Sci. Eng. A 433 (2006) 50-54.

DOI: 10.1016/j.msea.2006.06.089

[5] Y.F. Sun, H. Fujii, The effect of SiC particles on the microstructure and mechanical properties of friction stir welded pure copper joints, Mater. Sci. Eng. A 528 (2011) 5470-5475.

DOI: 10.1016/j.msea.2011.03.077

[6] K. Mizuuchi, K. Inoue, T. Takeuchi, Y. Okanda, Mechanical and damping properties of Fe-Al alloys containing Mn, Proc. on Mechanical Properties and Phase Transformations of Multiphase Intermetallic Alloys (TMS, Warrendale, Pennsylvania, 1994) 69-76.

[7] S. Khaple, R.G. Baligidad, M. Sankar, V.V.S. Prasad, Effect of melting process and aluminum content on the microstructure and mechanical properties of Fe-Al alloys, ISIJ Int. 50 (2010) 1483-1487.

DOI: 10.2355/isijinternational.50.1483

[8] S. Vyas, S. Viswanathan, V.K. Sikka, Effect of aluminum content on environmental embrittlement in binary iron-aluminum alloys, Scr. Metall. Mater. 27 (1992) 185-190.

DOI: 10.1016/0956-716x(92)90110-z

[9] T.B. Massalski, Binary Alloy Phase Diagrams. ASM, Metals Park, Ohio, (1990) 147.

[10] Y. Morisada, H. Fujii, T. Nagaoka, K. Nogi, M. Fukusumi, Fullerene/A5083 composites fabricated by material flow during friction stir processing, Compo. A 38 (2007) 2097-2101.

DOI: 10.1016/j.compositesa.2007.07.004

[11] D.H. Choi, Y.I. Kim, D.U. Kim, S.B. Jung, Effect of SiC particles on microstructure and mechanical property of friction stir processed AA6061-T4, Trans. Nonferrous Met. Soc. China 22 (2012) s614-s618.

DOI: 10.1016/s1003-6326(12)61773-7

[12] R.G. Baligidad, U. Prakash, A. Radhakrishna, Effect of thermo-mechanical processing and heat treatment on structure and mechanical properties of an electroslag remelted Fe-8. 5wt%Al-1. 1wt%C alloy, Mater. Sci. Eng. A 269 (1999) 120-124.

DOI: 10.1016/s0921-5093(99)00143-4