Measurements of the Thermophysical Properties of the API 5L X80

DOI: 10.4236/msa.2014.58064   PDF   HTML     6,342 Downloads   7,758 Views   Citations


The thermophysical properties of API 5L X80 steel were experimentally measured, in order to use these in computational models to determine the temperature field in welded joints. In this work, values of thermal expansion coefficient, specific heat, thermal diffusivity and thermal conductivity were experimentally obtained as a function of temperature. The thermal expansion coefficient was determined at temperatures of 20°C to 1200°C in a dilatometer DIL 402 PC. The specific heat was determined on a differential scanning calorimeter at temperatures between 300°C and 1200°C. The diffusivity and thermal conductivity were determined in the temperature range 100°C to 800°C in a 457 LFA diffusivimeter using laser flash technique. The thermal expansion coefficient remained approximately with constant value of 8.5 × 10-6 K-1 and suffered two falls reaching values -25 × 10-6 K-1 and -50 × 10-6 K-1 in the stages of heating and cooling respectively. It was observed for this material, minimum and maximum values of specific heat equal to 0.571 J/gK and 1.084 J/gK at temperatures of 300°C and 720°C, respectively. The behavior of thermal diffusivity and thermal conductivity in the temperature range 100°C to 800°C tends to decrease with increasing temperature. Based on the measured properties, computational modeling of the temperature field can be numerically obtained with better accuracy.

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Antonino, T. , Guimarães, P. , Alécio, R. , Yadava, Y. and Ferreira, R. (2014) Measurements of the Thermophysical Properties of the API 5L X80. Materials Sciences and Applications, 5, 617-627. doi: 10.4236/msa.2014.58064.

Conflicts of Interest

The authors declare no conflicts of interest.


[1] Shanmugam, S., Ramisetti, N.K., Misra, R.D.K., Hartmann, J. and Jansto, S.G. (2007) Microstructure and High Strength-Toughness Combination of a New 700MPa Nb-Microalloyed Pipeline Steel. Materials Science and Engineering, 478, 26-37.
[2] Shin, S.Y., Hwang, B., Lee, S., Kim, N. J. and Ahn, S.S. (2007) Correlation of Microstructure and Charpy Impact Properties in API X70 and X80 Line-Pipe Steels. Materials Science and Engineering A, 458, 281-289.
[3] Li, M., Brooks, J.A., Atteridge, D.G. and Porter, W.D. (1997) Thermophysical Property Measurements on Low Alloy High Strength Carbon Steels. Scripta Materialia, 36, 1356-1359.
[4] Chaowen, L. and Yong, W. (2013) Three-Dimensional Finite Element Analysis of Temperature and Strees Distributions for In-Service Welding Process. Materials and Design, 52, 1052-1057.
[5] Hansen, J.L. (2003) Numerical Modelling of Welding Induced Stresses. Ph.D. Thesis. Technical University of Denmark, Kongens Lyngby.
[6] Guimaraes, P.B., Pedrosa, P.M.A., Yadava, Y.P., Filho, A.V.S., Barbosa, J.M.A. and Ferreira, R.A.S. (2011) Obtaining Temperature Fields as a Function of Efficiency in TIG Welding by Numerical Modeling. Engenharia Térmica (Thermal Engineering), 10, 50-54.
[7] Guimaraes, P.B., Pedrosa, P.M.A., Yadava, Y.P., Filho, A.V.S., Barbosa, J.M.A. and Ferreira, R.A.S. (2013) Determination of Residual Stresses Numerically Obtained in ASTM AH36 Steel Welded by TIG Process. Materials Sciences and Applications, 4, 268-274.
[8] Deng, D. and Murakawa, H. (2006) Prediction of Welding Residual Stress in Multi-Pass Butt-Welded Modified 9Cr-1Mo Steel Pipe Considering Phase Transformation Effects. Computational Materials Science, 37, 209-219.
[9] Yaghi, A.H., Tanner, D.W.J., Hyde, T.H., Becker, A.A. and Sun, W. (2011) Abaqus Thermal Analysis of the Fusion Welding of a P92 Steel Pipe. SIMULIA Customer Conference, Barcelona, 17-19 May 2011, 622-638.
[10] Incropera, F.P. and Dewitt, D.P. (2008) Fundamentos de Transferência de Calor e Massa. 6th Edition, LTC, Rio de Janeiro.
[11] Richter, F. (1973) Die Wichtigsten Physikalishen Eigenschaften von 52 Eisenwerkstoffen, Verlag Stahleisen GmbH, Dusseldorf.
[12] Powell, R.W. and Hickman, M.J. (1946) Thermal Conductivity of a 0.8% Carbon Steel. Journal of the Iron and Steel Institute, 154, 112-116.
[13] ASTM, E1461-01 (2001) Standard Test Method for Thermal Diffusivity by the Flash Method.
[14] Rosenthal, D. (1941) Mathematical Theory of Heat Distribution during Welding and Cutting. Welding Journal, 20, 220-234.
[15] Rosenthal, D. (1946) The Theory of Moving Sources of Heat and Its Applications to Metal Treatments. Transactions of the ASME, 68, 849-866.
[16] García De Andrés, C., Caballero, F.G., Capdevila, C. and álvarez, L.F. (2002) Application of Dilatometric Analysis to the Study of Solid-Solid Phase Transformations in Steels. Materials Characterization, 48, 101-111.
[17] Pedrosa, I.R.V., Castro, R.S., Yadava, Y.P. and Ferreira, R.A.S. (2013) Study of Phase Transformations in API 5L X80 Steel in Order to Increase Its Fracture Toughness. Materials Research, 16, 489-496.
[18] Gery, D., Long, H. and Maropoulos, P. (2005) Effects of Welding Speed, Energy Input and Heat Source Distribution on Temperature Variations in Butt Joint Welding. Journal of Materials Processing Technology, 167, 393-401.
[19] Deng, D. (2009) FEM Prediction of Welding Residual Stress and Distortion in Carbon Steel Considering Phase Transformation Effects. Materials and Design, 30, 359-366.
[20] Attarha, M.J. and Sattari-Far, I. (2011) Study on Welding Temperature Distribution in Thin Welded Plates through Experimental Measurements and Finite Element Simulation. Journal of Materials Processing Technology, 211, 688694.
[21] Shan, X., Davies, C.M., Wangsdan, T., O’Dowd, N.P. and Nikbin, K.M. (2009) Thermo-Mechanical Modelling of a Single-Bead-on-Plate Weld Using the Finite Element Method. International Journal of Pressure Vessels and Piping, 86, 110-121.
[22] Cape, J. and Lehman, G. (1963) Temperature and Finite Pulse-Time Effects in the Flash Method for Measuring Thermal Diffusivity. Journal of Applied Physics, 34, 1909-1913.
[23] Parker, W.J., Jenkins, R.J., Butler, C.P. and Abbott, G.L. (1961) Flash Method of Determining Thermal Diffusivity, Heat Capacity and Thermal Conductivity. Journal of Applied Physics, 32, 1679-1684.
[24] Tsirkas, S.A., Papanikos, P. and Kermanidis, Th. (2003) Numerical Simulation of the Laser Welding Process in ButtJoint Specimens. Journal of Materials Processing Technology, 134, 59-69.
[25] Klobcar, D., Tusek, J. and Taljat, B. (2004) Finite Element Modeling of GTA Weld Surfacing Applied to Hot-Work Tooling. Computational Materials Science, 31, 368-378.
[26] Dhingra, A.K. and Murphy, C.L. (2005) Numerical Simulation of Welding-Induced Distortion in Thin-Walled Structures. Science and Technology of Welding and Joining, 10, 528-536.
[27] Goldak, J. and Chakravarti, A. (1984) A New Finite Element Model for Welding Heat Sources. Metallurgical Transactions B, 15, 299-305.
[28] Goldak, J.A. and Akhlaghi, M. (2005) Computational Welding Mechanics. Springer, New York, 30-35.
[29] Peet, M.J., Hasan, H.S. and Bhadeshia, H.K.D.H. (2011) Prediction of Thermal Conductivity of Steel. International Journal of Heat and Mass Transfer, 54, 2602-2608.

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