Steady State Creep Characteristics of a Ferritic Steel at Elevated Temperature: An Experimental and Numerical Study

Document Type: Original Article

Authors

1 Department of Mechanical Engineering, Mahshahr Branch, Islamic Azad University, Mahshahr, Iran

2 Dipartimento di ing. Meccanica e Aerospaziale, Politecnico di Torino, Corso Duca degli Abruzzi, Torino, Italy

3 Department of Industrial Engineering, Mahshahr Branch, Islamic Azad University, Mahshahr, Iran

Abstract

Prediction of creep life for a ferritic steel plate is significant in the context of its application as an element of steam generating systems. In this paper, the issue of elevated temperature creep in 2.25Cr–1Mo steel was investigated in detail, including the mechanism and the compatibility of hyperbolic sine modeling methodology for the description of steady state creep behavior of this alloy. Creep rupture tests were conducted on the thin foil samples at an elevated temperature ranging from 973 to 1073 K at various stresses between 90 to 210 MPa. A hyperbolic sine model is then used to fit the experimental creep data and the corresponding best fit parameters are provided. Using these parameters, a finite element analysis employing ABAQUS was carried and the reliability of the hyperbolic sine model was investigated in relation to the creep curve and creep life in the steady state creep area. The main outcome of the current study is creep characterisation of            2.25Cr–1Mo steel foils at extreme elevated temperature and to propose a finite element model for simulating this condition which is not reported so far. The results of experimental, constitutive analysis and finite element simulation were compared to each other and it was shown that they are in a good agreement.

Keywords

Main Subjects


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