Effect of machining parameters on surface textures in wire electro discharge machining of aisi 4140 steel

Click here for a simple search.
[feed] Atom [feed] RSS 1.0 [feed] RSS 2.0
 
 

Nurul Shazwani, Mehat (2008) Effect of machining parameters on surface textures in wire electro discharge machining of aisi 4140 steel. Faculty of Mechanical Engineering, Universiti Malaysia Pahang.

[img]
Preview
PDF
15Mb
[img]
Preview
PDF (References) - Accepted Version
14Kb
[img]
Preview
PDF (Table of contents)
88Kb
[img]
Preview
PDF (Abstract) - Accepted Version
29Kb
[img]
Preview
PDF (Chapter 1) - Accepted Version
20Kb

Official URL: http://iportal.ump.edu.my/lib/item?id=chamo:40342&...

Abstract

The Wire Electro Discharge Machining (WEDM) process is a violent thermal process where literally thousands of electrical discharges are produced in a fraction of a second in order to erode a certain volume of metal. The process is most used in situations where intricate complex shapes need to be machined in very hard materials (such as hardened tool steel). However, the process generates surface that have poor properties such as high tensile residual stresses, high surface roughness, presence of micro-cracks and micro-voids. These properties vary with different levels of the main machining parameters. The aim of this paper is to present experimental work that has been done in order to quantify the effect of some of the main WEDM parameters on the surface texture. 2D surface measurements were taken on all WEDM samples and 2D surface characterization has been carried out in order to calculate the different surface texture parameters. In this work, the surface characteristics caused by WEDM were analyzed by Scanning Electron Microscopy (SEM). An empirical model of AISI 4140 steel was proposed based on the experimental data. Surface roughness was determined with a ‘Perthometer’ recorder. Experimental results indicate that the WEDM process causes a ridged surface and induces machining damage in the surface layer and increases the surface roughness. The depth of micro-cracks and micro-voids increases with an increase in the amount of pulsed current and pulse-on duration. The effect of the magnitude of the pulse-on duration on the surface texture of the specimen is more significant than the pulsed current. Furthermore, the SEM reveals the two-dimensional image of surface textures of the WEDM specimen with a nanometer scale.

Item Type:Undergraduates Project Papers
Additional Information:Project paper (Bachelor of Mechanical Engineering) -- Universiti Malaysia Pahang - 2008
Uncontrolled Keywords:Surface roughness Surface (Technology)
Subjects:T Technology > TA Engineering (General). Civil engineering (General)
Faculty/Division:Faculty of Mechanical Engineering
ID Code:276
Deposited By: Mrs Nazatul Shima Baroji
Deposited On:02 Apr 2010 11:16
Last Modified:07 Mar 2017 13:47

Repository Staff Only: item control page

 

 

 

 

 

 

Introduction

An Institutional Repository is an online focus for collecting, preserving, and disseminating any University publication in the digital form for the intellectual sharing.
The UMP Institutional Repository (UMP IR) provides access of University publication such as journal article, conference paper, research paper, thesis and dissertations.


Any Enquiries

Please email or call Knowledge Management staff:-

Pn. Noorul Farina (noorul@ump.edu.my) OR
Cik Ratna Wilis Haryati (haryati@ump.edu.my)

Any correspondence concerning this specific repository should be sent to umplibrary@ump.edu.my