Commenced in January 2007
Paper Count: 31830
Determining Full Stage Creep Properties from Miniature Specimen Creep Test
Abstract:In this work, methods for determining creep properties which can be used to represent the full life until failure from miniature specimen creep tests based on analytical solutions are presented. Examples used to demonstrate the application of the methods include a miniature rectangular thin beam specimen creep test under three-point bending and a miniature two-material tensile specimen creep test subjected to a steady load. Mathematical expressions for deflection and creep strain rate of the two specimens were presented for the Kachanov-Rabotnov creep damage model. On this basis, an inverse procedure was developed which has potential applications for deriving the full life creep damage constitutive properties from a very small volume of material, in particular, for various microstructure constitutive regions, e.g. within heat-affected zones of power plant pipe weldments. Further work on validation and improvement of the method is addressed.
Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1474899Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 589
 T. H. Hyde, W. Sun and J. A. Williams, “The requirements for and the use of miniature test specimens to provide mechanical and creep properties of materials: - a review,” Int. Mater. Rev., vol. 52, no. 4, pp. 213-255, 2007.
 A. Morris, B.Cacciapuoti and W. Sun, “The role of small specimen creep testing within a life assessment framework for high temperature power plant,” Int. Mats. Rev., vol. 63, no. 2, pp. 102-137, 2018.
 T. H. Hyde, C. J. Hyde and W. Sun, “A basis for selecting the most appropriate small specimen creep test type,” Trans. ASME J. Pre. Ves. Technol., vol. 136, no. 2, pp. 024502-1- 024502-6. 2014.
 W. Sun, T. H. Hyde and S. J. Brett, “Application of impression creep data in life assessment of power plant materials at high temperatures,” J. Materials: Design & Applications., vol. 222, no.3, pp.175-182, 2008.
 W. Sun and T. H. Hyde, “Power plant remaining life assessment using small specimen testing techniques,” 9th Annual Conf. on Operational Outages for Power Generation. 28-30 March, 2011, Amsterdam, The Netherlands.
 W. Sun, T. H. Hyde and S. J. Brett, “Small specimen creep testing and application for power plant component remaining life assessment,” 4th Int. Conf. on Integrity, Reliability and Failure. Madeira, 23-27 June, 2013.
 T. H. Hyde, W. Sun, A. A. Becker and J. Williams, “Creep properties and failure assessment of new and fully repaired P91 pipe welds at 923 K,” J. Materials: Design and Applications., vol. 218, pp. 211-222, 2004.
 M. C. Askins and K. D. Marchant, “Estimating the remnant life of boiler pressure parts, EPRI Contract RP2253-1, Part 2, Miniature specimen creep testing in tension,” CEGB Report. TPRD/3099/R86, CEGB, UK, 1987.
 T. H. Hyde, W. Sun and A. A. Becker, “Analysis of the impression creep test method using a rectangular indenter for determining the creep properties in welds,” Int. J. Mech. Sci., vol. 38, pp. 1089-1102, 1996.
 J. P. Rouse, F. Cortellino, W. Sun, T. H. Hyde and J. Shingledecker, “Small punch creep testing: a review on modelling and data interpretation,” Mater. Sci. Technol., Vol. 29, no. 11, pp. 1328-1345, 2013.
 T. H. Hyde and W. Sun, “A novel, high sensitivity, small specimen creep test,” J. Strain Analysis, vol. 44, no. 3, pp. 171-185, 2009.
 A. Balhassn, T. H. Hyde and W. Sun, “Analysis and design of a small, two-bar creep test specimen,” Trans. ASME J. Eng. Mater. & Technol., vol. 135 no. 4, pp. 041006-1-041006-9, 2013.
 F. Cortellino, J. Rouse, B. Cacciapuoti, W. Sun and T. H. Hyde, “Experimental and numerical analysis of initial plasticity in P91 steel small punch creep samples,” Experimental Mechanics, vol. 57, no. 8, pp. 1193–1212, 2017.
 F.-K. Zhuang, S.-T. Tu, G.-Y. Zhou and Q.-Q. Wang. “Assessment of creep constitutive properties from three-point bending creep test with miniaturized specimens,” J. Strain Analysis, vol. 46, pp. 1-10, 2014.
 Y. Zheng and W. Sun, “An inverse approach for determining creep properties from a miniature thin plate specimen under bending,” Int. J. Mech., Aerospace, Industrial, Machatronic & Manf. Eng., vol. 9, no. 7, pp. 1199-1205, 2015.
 L. Kachanov, On rupture time under condition of creep. Izvestia Akademi Nauk USSR, Otd. Techn. Nauk, Moskwa, 1958, ch. 8, pp. 26-31.
 Y. N. Rabotnov Creep rupture. 1968. Stanford University: Springer.
 J. J. Kang, A. A. Becker and W. Sun, “Determiningelastic–plastic properties from indentation data obtained from finite element simulations and experimental results,” Int. J. Mech. Sci., vol. 62, pp. 34-46, 2012.