Structural integrity of service exposed primary reformer tube in a petrochemical industry

Ray, Ashok K and Roy, Nilima and Raj, A and Roy, B N (2016) Structural integrity of service exposed primary reformer tube in a petrochemical industry. International Journal of Pressure Vessels and Piping, 137 (IF-1.28). pp. 46-57.

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This paper aims at quantifying creep damage, in terms of Kachanav's continuum damage mechanics (CDM) model and Bogdanoff model of service exposed primary hydrogen reformer tube. Quantification of creep damage was made from scatter in voids which was quantified from light optical microscopy (LOM), SEM (scanning electron microscope) equipped with image analyzing technique and EDX analyser, in terms of two damage parameters A and A*. Scatter in creep deformation behaviour of the material, is probably due to variation in mode of fracture and scatter in voids. Probability of rupture due to void area, shifts towards the higher population of void with increase in true strain. Experimental data for estimating creep damage agrees well with both the simulation based models. The value of damage tolerance parameter a infers that growth of cavities has been attributed to a purely diffusion controlled mechanism, grain boundary sliding mechanism, or a combination of both. (C) 2015 Elsevier Ltd. All rights reserved.

Item Type:Article
Official URL/DOI:
Uncontrolled Keywords:Creep deformation; Fractography; True strain; Void analysis; Optical microscopy; CDM model; Markov process
Divisions:Material Science and Technology
ID Code:7387
Deposited By:Sahu A K
Deposited On:25 Feb 2016 14:37
Last Modified:20 Sep 2017 15:28
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