Static Strain Aging in Fe-Mn-N Alloys Investigated by Impulse Excitation Internal Friction Analysis

Abstract:

The Fe-Mn-N alloys used in the present study showed an unexpected increase of both the yield strength and the ultimate tensile strength after prestraining and strain aging. In order to understand the mechanism of this phenomenon, which is due to solute N, static strain aging tests were carried out in combination with resonant impulse excitation internal friction analysis. It is shown that the interaction between thermal kinks and solute N atoms plays an essential role in the increase of the tensile strength.

• Periodical: Solid State Phenomena (Volume 184)
• Pages: 203-208
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.184.203
• Online since: January 2012
• Authors: Jae Hyuk Jung, Ernst Kozeschnik, Seong Ho Han, Bruno C. De Cooman
• Keywords: Dislocation-Related Relaxation, Internal Friction, Nitrogen, Snoek Relaxation, Static Strain Aging

References

[1] L.J. Dijkstra and P.J. Sladek, Trans. Met. Soc. A.I.M.E., 197 (1953) 69.

[2] J.F. Enrietto, Trans. Met. Soc. A.I.M.E., 224 (1962) 119.

[3] J.D. Fast, L.J. Dijkstra, Philips Techn. Rev., 13 (1951) 172.

[4] M. Weller, Conf. Proc. High Nitrogen Steels, Varna (Bulgaria) (1989).

[5] M. Koiwa, Phil. Mag., 24 (1971) 81.

[6] A. Kruk, J. Pietrzyk and C. Kapusta, Sctipta Met., 31 (1994) 1679.

[7] A.H. Cottrell and B.A. Bilby, Proc. Phys. Soc. A62 (1949) 49.

[8] M. Blanter, I. Golovin, H. Neuhäuser, H. Sinning, IF in Metallic Materials, Springer, NY, (2007).

[9] M. Weller, Journal de Phys., 44-C9 (1983) 63.

[10] L.B. Magalas, Journal de Phys., 6-C8 (1996) 163.

[11] E.T. Stephenson, Metall. Trans., 5 (1974) (1987).

[12] I.G. Ritchie and R. Rawlings, Acta Met., 15 (1967) 491.

[13] D.N. Beshers, J. appl. Phys., 36 (1965) 290.

[14] H. Schultz, Mater. Sci. Eng., 141 (1991) 149.