Welcome To UTPedia

We would like to introduce you, the new knowledge repository product called UTPedia. The UTP Electronic and Digital Intellectual Asset. It stores digitized version of thesis, dissertation, final year project reports and past year examination questions.

Browse content of UTPedia using Year, Subject, Department and Author and Search for required document using Searching facilities included in UTPedia. UTPedia with full text are accessible for all registered users, whereas only the physical information and metadata can be retrieved by public users. UTPedia collaborating and connecting peoples with university’s intellectual works from anywhere.

Disclaimer - Universiti Teknologi PETRONAS shall not be liable for any loss or damage caused by the usage of any information obtained from this web site.Best viewed using Mozilla Firefox 3 or IE 7 with resolution 1024 x 768.

Study of PWHT Microstructures and Mechanical Properties for Mild Steel and SA106B Pipe Material

Mohd Azahari bin Mohamed Buang, Mohd Azahari (2010) Study of PWHT Microstructures and Mechanical Properties for Mild Steel and SA106B Pipe Material. Universiti Teknologi Petronas. (Unpublished)

[img]
Preview
PDF
Download (4Mb) | Preview

Abstract

Welding is a well-known process of steel fabrication especially in oil and gas industry. Nowadays, we all can see a lot of improvement of welding quality on steel fabrication sector. This is all involving remarkable finding about the behavior effect of steel welding especially on weld defect cases. Defect is an excessive condition and outside the acceptance limits. Weld defects include porosity, incomplete fusion, weld cracking, and undercut. In order to control the welding defect, many researches have been done including the heat treatment for weld. All of it is to avoid undesired failure that can lead to catastrophic. On a carbon steel material structure, defect usually occurs at the weld region. Welding process involve the process of heating and cooling of material being weld together. This cyclic heat source from welding process will alter the base metal microstructure. The alteration of base metal microstructure can cause the mechanical properties at the welded structure to changes. Localized expansions also exist due to heat from welding or molten metal. When the weld cools, some areas cool and contract more than others. This contraction with the bulk metal surrounding weldment will provide residual stresses. This residual stress is often become cause a premature failure of critical component like bridge bar links and pressure vessel. One way to overcome this problem is heat treatment. Heat treatment is a method used to modify the physical properties of a material. The use of heat treatment is to heating or chilling the material to extreme temperature to achieve a desired result such stress relieving, hardening, or softening. Base on Iron-Carbon phase diagram, we are able to see the changes in microstructure during heating and cooling. This research is to characterize the mechanical properties and its microstructure of the weld zone in order to avoid failure due to weld defect or microstructure refinement for carbon steel material. This research is to characterize the mechanical properties by subjecting the material microstructure to post weld heat treatment (PWHT). This study will provide relationship of the steel microstructure, mechanical properties, and PWHT.

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 12:23
Last Modified: 25 Jan 2017 09:43
URI: http://utpedia.utp.edu.my/id/eprint/1433

Actions (login required)

View Item View Item

Document Downloads

More statistics for this item...