Tests under mechanical strain control were performed to investigate the TMF behavior of Z2CND18.12N within the temperature range between 150-550℃. Different strain amplitudes and phase-angles were applied. Total strain controlled low cycle fatigue test was also performed at the peak temperature of TMF cycling. The results show that the cyclic stress response of the material displayed an initial hardening regime followed by a saturation period and then cyclic softening till failure. The TMF cycling leads to the development of significant amounts of mean stress. Some life prediction models were employed to predict the TMF life of Z2CND18.12N, and the results indicate that the energy-based models provide good prediction on the thermal-mechanical fatigue behaviors of this material. An optical microscopic observation shows that the surface crack initiations and crack propagations are typically transgranular mode.
CHEN Xu
. Fatigue behaviors of Z2CND18.12N stainless steel under thermal-mechanical cycling[J]. Acta Metallurgica Sinica (English Letters), 2011
, 24(2)
: 101
-108
.
DOI: 10.11890/1006-7191-112-101
[1] A. Nagesha, M. Valsan, K. Bhanu Sankara Rao, R. Kannan and S.L. Mannan,Trans IIM58(2-3)(2005) 373.
[2] H.J. Shi, Z.G. Wang and H.H. Su,Scr Mater 35(9)(1996) 1107.
[3] S.G. Hong, K.O. Lee and S.B. Lee,Int J Fatigue 27(2005) 1420.
[4] R. Klaus, B. Tilmann and L. Detlef,Mater Sci Eng A 345(2003) 309.
[5] R. Zauter, H-J Christ and H. Mughrabi,Met Mater Trans A25(1994) 401.
[6] H. Samrout and R. EI Abdi,Int J Fatigue20(1998) 555.
[7] S. L. Mannan and M. Valsan,Int J Mech Sci48(2006) 160.
[8] T. Gocmez , A. Awarke and S. Pischinger,Int J Fatigue32(2010) 769.
[9] B. Tomkins, G. Sumner and J. Wareing,International Symposium on Low Cycle Fatigue Strength and Elasto-plastic Behavior in Materials(Stuttgart, Germany, 1979)
[10] R.W. Neu and H. Sehitoglu,Met Mater Trans A20A(1989) 495.
[11] F. Ellyin and D. Kujawski,Microstructure and Mechanical Behavior of Materials(EMAS Pub, West Midlands, UK,1986) p.541.