High Cycle Fatigue Properties of Duplex Stainless Steel in Air and 3.5% NaCl Solution

Abstract:

The high cycle fatigue of super duplex stainless steel of SAF 2507 was investigated by rotating bending fatigue test in both air and 3.5% NaCl environment. The results showed that there is no much reduction of the fatigue life in corrosive environment, which is 90% of the air fatigue strength. In air fatigue, failure happens in ductile mode with austenite grains having finer and straighter fatigue striations than ferrite grains. Width and spacing of striations vary with the orientation and locations when the second cracking occurs. It is not reliable to identify the phase by morphology of striations. In 3.5% NaCl environment, the fracture exhibits a mixed mode of cleavage and quasi-cleavage in ferrites and ductile in austenite grains.

• Periodical: Applied Mechanics and Materials (Volume 750)
• Pages: 114-120
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.750.114
• Online since: April 2015
• Authors: Shu Rong Yu, Wei Song, Shu Xin Li*, Meng Kai
• Keywords: Ductile Fracture, Duplex Stainless Steel, Fatigue Limit, Fatigue Striations

References

[1] M. Balbi, M. Avalos, A. El Bartali, I. Alvarez-Armas. Microcrack growth and fatigue behavior of a duplex stainless steel. Int. J. Fat. 31 (2009) 2006-(2013).

DOI: 10.1016/j.ijfatigue.2008.12.007

[2] M. Scharnweber, W. Tirschler, C. G. Oertel, W. Skrotzki, Initiation and propagation of short cracks in austenitic-ferritic duplex steel. Mater. Sci. & Eng. A. 583 (2013) 52-60.

DOI: 10.1016/j.msea.2013.06.059

[3] M. Scharnweber, W. Tirschler, V. Mikulich, S. Jacob, Influence of crack length and grain boundaries on the propagation rate of short cracks in austenitic stainless steel. 67 (2012) 677-680.

DOI: 10.1016/j.scriptamat.2012.07.007

[4] I. Alvarez-Armas, U. Krupp, M. Balbi, S. Herenu. Growth of short cracks during low and high cycle fatigue in a duplex stainless steel. Int. J. Fat. 41 (2010) 95-100.

DOI: 10.1016/j.ijfatigue.2012.01.010

[5] R. Strubbia, S. Herenu, M.C. Marinelli, I. Alvarez-Armas, Short crack nucleation and growth in lean duplex stainless steels fatigued at room temperature. Int. J. Fat. 41 (2012) 90-94.

DOI: 10.1016/j.ijfatigue.2012.01.011

[6] I. Konstantin, D. Benjamin, S. Norbert. Analysis of VHCF damage in a duplex stainless steel using hard X-ray diffraction techniques. Int. J. Fat. (2014) in press.

[7] G. C. Chai, N. A. Zhou, S. Ciurea, Local plasticity exhaustion in a very high cycle fatigue regime. Scripta Materialia, 66 (2012) 769-772.

DOI: 10.1016/j.scriptamat.2012.02.003

[8] S. Herenu, I. Alvarez-Armas, A. Armas. Microstructural changes in a duplex stainless steel during low cycle fatigue. Testing Mater. & Comp. Tech. & Appl., 2009, 51(6), 359-364.

DOI: 10.3139/120.110044

[9] I. Alvarez-Armas, M.C. Marinelli, S. Herenu. On the cyclic softening behavior of SAF 2507 duplex stainless steel, Acta. Mater. 54 (2006) 5041-5049.

DOI: 10.1016/j.actamat.2006.06.037

[10] J. Polak, M. Petrence, T. Kruml. Cyclic plastic response and fatigue life in superduplex 2507 stainless steel. Int. J. Fat. 32(2010) 279-287.

DOI: 10.1016/j.ijfatigue.2009.06.014

[11] I. Alvarez-Armas, M. C. Marinelli, J. A. Malarrı´a, S. Degallaix. Microstructure associated with crack initiation during low-cycle fatigue in a low nitrogen duplex stainless steel. Int. J. Fat. 29 (2007) 758-764.

DOI: 10.1016/j.ijfatigue.2006.06.002

[12] B. Dönges, A. Giertler, U. Krupp, C. P. Fritzen, Significance of crystallographic misorientation at phase boundaries for fatigue crack initation in a duplex stainless steel during high and very high cycle fatigue loading. Mater. Sci. & Eng. A. 589 (2014).

DOI: 10.1016/j.msea.2013.09.098

[13] M. C. Marinelli, A. El Bartali, J. W. Signorelli, P. Evrard, Activated slip systems and microcrack path in LCF of a duplex stainless steel. Mater. Sci. & Eng. A. 509 (2009) 81-88.

DOI: 10.1016/j.msea.2009.01.012

[14] P. K. Chiu, K. L. Weng, S. H. Wang, J.R. Yang, Low-cycle fatigue-induced martensitic transformation in SAF 2205 duplex stainless steel. Mater. Sci. & Eng. A. 398 (2005) 349-359.

DOI: 10.1016/j.msea.2005.03.096

[15] G. Chai, Fatigue behaviour of duplex stainless steels in the very high cycle regime. Int. J. Fat. 28 (2006) 1611-1617.

DOI: 10.1016/j.ijfatigue.2005.06.054

[16] U. Krupp, H. Knobbe, H. J. Christ, P. Köster, The significance of microstructural barriers during fatigue of a duplex steel in the high- and very-high-cycle-fatigue (HCF/VHCF) regime. Int. J. Fat. 32 (2010) 914-920.

DOI: 10.1016/j.ijfatigue.2009.09.010

[17] K. Istomin, B. Dönges, N. Schell, H. J. Christ. Analysis of VHCF damage in a duplex stainless steel using hard X-ray diffraction techniques. Int. J. Fat. 2014, in press.

DOI: 10.1016/j.ijfatigue.2014.04.001

[18] Z. Duan, X. F. Ma, H. J. Shi, R. Murai, Gigacycle fatigue behaviors of two SNCM439 steels with different tensile strengths. Acta. Mech. Sin. 27 (2011) 778-784.

DOI: 10.1007/s10409-011-0451-5

[19] T. Abe, Y. Furuya, S. Matsuoka, Gigacycle fatigue properties of 1800 MPa class spring steel. Fat. Fract. Eng. Mater. Struct. 27(2004) 159-167.

DOI: 10.1111/j.1460-2695.2004.00737.x

[20] S. X. Li, P. Y. Zhang, S. R. Yu. Experimental study on very high cycle fatigue of martensitic steel of 2Cr13 under corrosive environment. Fat. Fract. Eng. Mater. Struct. 2014, in press.

DOI: 10.1111/ffe.12197

[21] T. Kruml, J. Polark, K. Obrtlik, S. Degallaix. Dislocation-structures in the bands of localized cyclic plastic strain in ausentitic 316L and ausenitic-ferritic duplex stainless steels. Acta Mater. 45 (1997) 5145-5151.

DOI: 10.1016/s1359-6454(97)00178-x

[22] K. Makhlouf, H. Sidhom, I. Triguia, C. Braham, Corrosion fatigue crack propagation of a duplex stainless steel X6 CrNiMoCu25-6 in air and in artificial sea water. Int. J. Fat. 25(2003) 167-179.

DOI: 10.1016/s0142-1123(02)00046-4

[23] K. N. Krishnan, Mechanism of corrosion fatigue in super duplex stainless steel in 3. 5 percent NaCl solution. Int. J. Fract. 88 (1998) 205-221.