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Microstructure Characterization of As-cast, Creep-tested and Ex-service Steam-methane Reformer Tube

Nurul Aini Binti Mohd Faudzi, Nurul Aini (2009) Microstructure Characterization of As-cast, Creep-tested and Ex-service Steam-methane Reformer Tube. Universiti Teknologi Petronas, Sri Iskandar,Tronoh,Perak. (Unpublished)

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Abstract

The main objective of this project is to study the microstructural transformation of a steam-methane reformer tube material during creep and after long term service by comparing the microstructures in creep-tested samples, ex-service samples, and as-cast samples. The creep-tested samples were not completely representative of the actual creep process during service. The ex-service material represents the material that underwent actual service condition. The as-cast and creep-tested samples were obtained from the Schmidt+Clemens (Spain) for preparation and evaluation, while the ex-service samples were obtained from a methanol plant in North America. The microstructural comparisons were made in terms of the shape, average particle size, particle area fraction and percentage. The samples were examined using optical microscope (OM) and scanning electron microscope (SEM), with secondary electron (SE) and backscattered electron (BSE) imaging. Energy dispersive spectroscopy (EDS) was conducted at selected areas of the samples. The average particle size and particle area percentage of the primary carbides were measured using NIH ImageJ software. The shape of the primary carbides (M23C6 and NbC) in the ex-service sample is rounder compared to the creep-tested and finer shape of the as-cast sample with increasing service time and temperature.

Item Type: Final Year Project
Subject: T Technology > TJ Mechanical engineering and machinery
Divisions: Engineering > Mechanical
Depositing User: Users 5 not found.
Date Deposited: 11 Jan 2012 12:24
Last Modified: 25 Jan 2017 09:44
URI: http://utpedia.utp.edu.my/id/eprint/675

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