13th International Conference on Fracture June 16–21, 2013, Beijing, China -9- The creep strength is related to intragranular precipitates and nano particles acting as obstacles for dislocation movement. Plastic deformation and transgranular fracture is the main creep fracture mechanism in the creep test samples of UNS S31035 for high applied stresses, but trend to intergranular fracture with decreasing stresses and increasing temperature. Acknowledgements This paper is published by permission of Sandvik Materials Technology. References [1] IEA, 2009 energy statistics, http://www.iea.org/stats, (2010-02-25). [2] R. Blum, R.W. Vanstone and C. Messelier-Gouze, Materials Development for Boilers and Steam Turbines Operating at 700 °C, Proc. 4th Int. Conf. on Adv. in Mater. Technol. for Fossil Power Plant, (2004) 116. [3] R. Rautio, S. Bruce, Sandvik Sanicro 25, a new material for ultra supercritical coal fired boilers, Proc. 4th Inter Conf. on Adv. in Mater. Technol. for fossil power plants, (2004) 274. [4] G. Chai, J.O. Nilsson, M. Boström, J. Högberg and U. Forsberg, Advanced Heat Resistant Austenitic Stainless Steels, Proc. of ICAS 2011 (2010) 56. [5] G. Chai, M. Boström, M. Olaison and U. Forsberg, Creep and LCF behaviors of newly developed advanced heat resistant austenitic stainless steel for A-USC, Procedia Engineering 2012, in press [6] R. Sandström, Journal of Testing and Evaluation, 31 (2003) 58-66. [7] R. Sandström and L. Lindé, Precision in the extrapolation of creep rupture data, Journal of Testing and Evaluation Vol. 27, No3 (1999) 203-210. [8] Generic recommendations and guidance for the assessment of full size creep rupture datasets, ECCC recommendations - volume 5 part in [issue 5], 2008. [9] J. Högberg, G. Chai, P. Kjellström, M. Boström, U. Forsberg and R. Sandström, (2010), Creep behavior of the newly developed advanced heat resistant austenitic stainless steel grade UNS S31035, PVP2010-25727, Bellevue Washington, USA.
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