252 Prakt. Met. Sonderband 46 (2014) 
, DUPL! 
TRAN: 
Small grains M. Breda 
IOF — T 
- — * DIL, U 
A BME, 
ABSTR 
Dissolution of [O] Duplex S 
chemical 
strength 
Figure 5: Kinetics of internal oxidation in the microstructure with small grains (deformed instability 
sample). uses 
phase c: 
deformat 
Cold rolli 
4. CONCLUSIONS the form 
caused | 
In our research the influence of extreme plastic deformation on the growth rate of the I0Z Martensi 
was investigated. The results show that in the microstructure with a high portion of grain especiall 
boundaries and other defects in the crystal lattice, the preferred oxygen diffusion along the The aim 
grain boundaries enables faster growth of I0Z with more uniform internal oxidation front terms of 
and finer oxide particles. propertie 
5. REFERENCES 1. INTF 
[1] E . Arzt, D.S. Wilkinson, Acta Metallurgica, 34 (1986) 10, 1863- 1898 Duplex s 
[2] E . Arzt, P. Grahle, Zeitschrift fur Metallkunde, 87 (1996) 5, 874 — 883 microstri 
[3] |. Anzel, Metalurgija, 13 (2007) 4, 325-336 between 
[4] N. Birks, G. H. Meier, F. S. Pettit, Introduction to High Temperature Oxidation of the ferrit 
Metals 2" edition, Cambridge University Press, Cambridge 2006 dangerot 
[5] Z.Horita, M. Furukawa. M. Nemoto, T.G. Langdon, Mat.Sci.Teh., 16, (2000), 1239- negative 
1245 Thus, all 
[6] V.M. Segal, V.I. Reznikov, A.E. Drobyshevskiy, V.I. Kopylov, Metally 1 (1981), 115 water qt 
[7] V.M. Segal, V.l. Reznikov, V.I. Kopylov, D.A. Pavlik, V.F. Malyshev, Scientific and manufac 
Technical Publishing, Minsk, Belarus 1994 since au: 
[8] M. Furukawa, Z. Horita, T. G. Langdon , Mater. Sci. and Eng., A,332 (2002), 97-109 can caus 
[9] |. Anzel. A. Kneisl. L. Kosec, Z. Metalikd. 90 (1999) suitable : 
the so-c 
austenitir 
grades [¢ 
Cold rol 
thicknes: 
high def