Short Crack Initiation during Low-Cycle Fatigue in SAF 2507 Duplex Stainless Steel


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In this work, the formation of fatigue cracks is considered as a nucleation process due to the development of a characteristic microstructure formed just beneath the specimen surface. Strain controlled cyclic tests were carried out at room temperature at total strain ranges εt = 0.8 and 1.2% in flat specimens of SAF 2507 Duplex Stainless Steel (DSS). The results show that for this DSS, at εt = 0.8%, the correlation between phases (Kurdjumov-Sacks crystallographic relation) plays an important role in the formation of microcracks. On the other hand, at εt = 1.2%, microcracks initiate in the ferritic phase and the K-S relation does not seem to affect the formation of the cracks.



Key Engineering Materials (Volumes 345-346)

Edited by:

S.W. Nam, Y.W. Chang, S.B. Lee and N.J. Kim




M.C. Marinelli et al., "Short Crack Initiation during Low-Cycle Fatigue in SAF 2507 Duplex Stainless Steel", Key Engineering Materials, Vols. 345-346, pp. 343-346, 2007

Online since:

August 2007




[1] A. Bataille, T. Magnin, Acta Mater. Vol 42 (1994), pp.3817-25.

[2] J.C. Grosskreutz and H. Mughrabi, in: Constitutive Equations in Plasticity, edited by Ali S. Argon. The MIT Press, Cambridge, Massachusetts, 251 (1975).

[3] S. Suresh, in: Fatigue of Materials, 2 nd Ed, Cambridge University Press, 132 (1998).

[4] H. Mughrabi, F. Ackermann and K. Herz, ASTM-STP 675 (1979), pp.69-105.

[5] H. Mughrabi, K. Herz and X. Stark, Int. J. Fracture, Vol. 17 (1981), pp.193-220.

[6] J. Polak, J. Man and K. Obrtlík, Int. J. Fatigue. Vol 25 (2003), pp.1027-36.

[7] J. Man, M. Petrenec, K. Obrtlik, J. Polak, Acta Mater., Vol 52 (2004), pp.5551-61.

[8] I. Alvarez-Armas, M.C. Marinelli, J. Malarría, S. Degallaix, A. Armas, Int. J. Fatigue (2006), in press.

[9] P.B. Hirsch, P.G. Partridge and P.L. Segall, Phil. Mag., Vol 4 (1960), p.721.

[10] D.A. Lott-Crumpler, Modelling Simul. Mater. Sci. Eng., Vol 5 (1997), pp.317-36.

[11] H. Mughrabi, Proc 50th Anniv. Concept of Dislocations in Crystals, p.244. Inst. of Metals London (1985).

[12] O. Dúber, B. Kúnkler, U. Krupp, H.J. Christ, C.P. Fritzen, Int. J. Fatigue, Vol. 28 (2006) pp.983-992.

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