Abstract
It has been realised that plasticity has a significant effect on the creep ductility of Austenitic Type 316H stainless steel at \(550\,^\circ \mathrm{{C}}\). Recently a model has been produced to estimate the creep ductility and strain rate as a function of the plastic strain levels in the material. A variable creep ductility model, incorporating stress dependent strain rate effects, has therefore been implemented in a finite element (FE) analysis to predict creep crack growth (CCG) in 316H stainless steel at \(550\,^\circ \mathrm{{C}}\). Recent experimental results have shown that material pre-compression to 8 % plastic strain at room temperature accelerates the creeping rate and significantly reduces the creep ductility of 316H stainless steel at \(550\,^\circ \mathrm{{C}}\). In addition pre-compression significantly hardens the material and thus the levels of plasticity on specimen loading in tension are reduced. As a result, accelerated cracking rates are observed in pre-compressed (PC) materials compared to as-received (AR) (non-compressed) materials. The variable creep ductility FE CCG model has been employed to predict the CCG behaviour of AR and PC materials and to analyse their differences. Comparisons are also made to FE and analytical constant creep ductility models.
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References
Davies, C.M., Mueller, F., Nikbin, K.M., O’Dowd, N.P., Webster, G.A.: Analysis of creep crack initiation and growth in different geometries for 316H and carbon manganese steels. J. ASTM Int. 3(2), (2006). doi:10.1520/JAI13223
Dean, D.W., Gladwin, D.N.: Creep crack growth behaviour of type 316H steels and proposed modifications to standard testing and analysis methods. Int. J. Press. Vessels Pip. 84(6), 378–395 (2007)
Spindler, M.W.: The multiaxial creep ductility of austenitic stainless steels. Fatigue Fract. Eng. Mater. Struct. 27(4), 273–282 (2004)
Mehmanparast, A., Davies, C.M., Dean, D.W., Nikbin, K.M.: The influence of cold pre-compression on high temperature deformation and fracture behaviour of 316H stainless steel. In: ESIA11: Design, Fabrication, Operation and Disposal, EMAS, Manchester, 24–25 May 2011
Davies, C.M., Dean, D.W., Nikbin, K.M.: The influence of compressive plastic pre-strain on the creep deformation and damage behaviour of 316H stainless steel. In: Proceedings of the International Conference on Engineering Structural Integrity Assessment—Its Contribution to the Sustainable Economy, Manchester, EMAS Publishing, UK, 19–20 May 2009
Davies, C.M., Dean, D.W., Mehmanparast, A., Nikbin, K.M.: Compressive pre-strain effects on creep and crack growth behaviour of 316H stainless steel. In: ASME 2010 Pressure Vessels and Piping Division/K-PVP Conference, ASME, PVP2010-25044, Bellevue, Washington, USA, 18–22 July 2010
Oh, C.-S., Kim, N.-H., Kim, Y.-J., Baek, J.-H., Kim, Y.-P., Kim, W.-S.: A finite element ductile failure simulation method using stress-modified fracture strain model. Eng. Fract. Mech. 78(1), 124–137 (2011). doi:10.1016/j.engfracmech.2010.10.004
Yatomi, M., Nikbin, K.M., O’Dowd, N.P.: Creep crack growth prediction using a damage-based approach. Int. J. Press. Vessels Pip. 80(7–8), 573–583 (2003)
Mehmanparast, A.: Influence of inelastic damage on creep, fatigue and fracture toughness. Ph.D. Thesis, Department of Mechanical Engineering, Imperial College London, 2012
Cocks, A.C.F., Ashby, M.F.: On creep fracture by void growth. Prog. Mater. Sci. 27, 189–244 (1982)
Webster, G.A., Ainsworth, R.A.: High Temperature Component Life Assessment, 1st edn. Chapman and Hall, London (1994)
Davies, C.M., Kourmpetis, M., O’Dowd, N.P., Nikbin, K.M.: Experimental evaluation of the J or C* parameter for a range of cracked geometries. J. ASTM Int. 3(4), 2006. doi:10.1520/JAI13220
ASTM, E1457–07: Measurement of creep crack growth times in metals. In: Annual Book of ASTM Standards, Vol. 03.01. ASTM International, 2007, pp. 1012–1035
Nikbin, K.M., Smith, D.J., Webster, G.A.: Prediction of creep crack growth from uniaxial creep data. Proc. Royal Soc. A 396, 183–197 (1984)
Shih, C.F.: Tables of Hutchinson-Rice-Rosengren singular field quantities, MRL E-Providence, Ri, Brown University Technical Report, MRL E-147, June, 1983
Tan, M., Célard, N.J.C., Nikbin, K.M., Webster, G.A.: Comparison of creep crack initiation and growth in four steels tested in HIDA. Int. J. Press. Vessels Pip. 78(12), 737–747 (2001)
Davies, C.M., O’Dowd, N.P., Nikbin, K.M., Webster, G.A.: An analytical and computational study of crack initiation under transient creep conditions. Int. J. Solids Struct. 44, 1823–1843 (2007). doi:10.1016/j.ijsolstr.2006.08.036
Mehmanparast, A., Davies, C.M., Dean, D.W., Nikbin, K.M.: Material pre-conditioning effects on the creep behaviour of 316H stainless steel. In: 13th International Conference on Pressure Vessel Technology ICPVT-13, London, 2012
Acknowledgments
The authors wish to acknowledge discussions with Prof. Y-J Kim, Dr C-S Oh and Mr N-H Kim from Korea University. This work has been supported by EDF Energy Nuclear Generation and EPSRC under grant EP/I004351/1.
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Davies, C.M., Mehmanparast, A. (2013). Creep Crack Growth Modelling in 316H Stainless Steel. In: Altenbach, H., Kruch, S. (eds) Advanced Materials Modelling for Structures. Advanced Structured Materials, vol 19. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-35167-9_11
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