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Creep behaviour characterisation of a ferritic steel alloy based on the modified theta-projection data at an elevated temperature

  • Roozbeh Alipour and Ali Farokhi Nejad
Published/Copyright: April 30, 2016
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International Journal of Materials Research
From the journal International Journal of Materials Research Volume 107 Issue 5

Abstract

This paper establishes and examines the constitutive model of the modified theta-projection concept for predicting the creep-rupture behaviour of a 2.25Cr-1Mo ferritic steel alloy foil at the loading conditions of practical interest. For this purpose, a series of creep-rupture tests are conducted on 0.15 mm thick foil specimens at an elevated temperature of 1 027 K and applied stresses in the range of 90 – 210 MPa. The creep-rupture behaviour of the foil is well represented using the model of the modified three-parameter theta-projection concept. Each model parameter is well represented as a function of the applied stress. Moreover, the creep failure mechanism was analysed by means of field emission scanning electron microscopy. The results showed that chromium atoms diffuse to the grain boundary and form carbide precipitates at the elevated temperature, leading to inter-granular fracture in the material.

Keywords: Creep; Ferritic alloy; Modified theta projection; Elevated temperature; Failure mechanism
*Correspondence address, Dr. Roozbeh Alipour, Department of Mechanical Engineering, Mahshahr Branch, Islamic Azad University, Mahshahr, Imam-Khomeini Blvd., Daneshgah Street, Mahshahr, Khuzestan, 6351977439, Islamic Republic of Iran. Tel.: +9861 52318180, E-mail:

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Received: 2015-11-12
Accepted: 2016-01-12
Published Online: 2016-04-30
Published in Print: 2016-05-13

© 2016, Carl Hanser Verlag, München

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https://doi.org/10.3139/146.111362
Keywords for this article
Creep; Ferritic alloy; Modified theta projection; Elevated temperature; Failure mechanism

Articles in the same Issue

  1. Contents
  2. Contents
  3. Original Contributions
  4. Microstructural evolution and creep of Fe–Al–Ta alloys
  5. Creep behaviour characterisation of a ferritic steel alloy based on the modified theta-projection data at an elevated temperature
  6. Facile fabrication, microstructure, and corrosion resistance of high-strength, high-hardness pure bulk aluminum
  7. A method for improving the mechanical properties of a hypereutectic Al–Si alloy by introducing the α-Al phase
  8. Experimental investigation by atomic force microscopy on mechanical and tribological properties of thin films
  9. Influence of ceramic B4C particulate addition on tensile behavior of 6061 aluminum matrix
  10. Role of cerium, lanthanum, and strontium additions in an Al – Si – Mg (A356) alloy
  11. Structural and mechanical study on Mg–xLM (x = 0–5 wt.%, LM = Sn, Ga) alloys
  12. Weibull distribution application on temperature dependence of polyurethane storage modulus
  13. Hierarchical bismuth phosphate microspheres with high photocatalytic performance
  14. Influence of calcination temperature on sol–gel synthesized single-phase bismuth titanate for high dielectric capacitor applications
  15. People
  16. Prof. Dr. Wolfgang Bleck on the occasion of his 65th birthday
  17. DGM News
  18. DGM News
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