studies were found focuses on hardness, wear resistance and microstructural properties of carburizing low carbon steel Tokaji et. al., 2003, Aminul I. et. al.
2002. In this research, the effect of time and temperature variation on fracture properties of carburized low carbon steel AISI 1020 is studied.
Fracture mechanics is a subject for critical study that has barely been for around a century. It was invented during World War I by English aeronautical
engineer A.A Griffith, and known as a method for predicting failure of the structure containing a crackInternet source:27082007.Then, the fracture toughness is
known as the resistance of a material to fracture. Basically, it depends on temperature, environment, loading rate, the composition of the material and its
microstructure also the geometric effectInternet source: 06082007.In this research, the fracture toughness of material which is low carbon steel is determined
by using three-point bending experiment. In this experiment, V-notch is machined to the specimens which are loaded to failure. The fracture toughness is given by
calculating the driving force for the failure condition.
1.2 Objective
To study and discuss the effects of carburizing time and temperature variation on fracture properties of carburized low carbon steel using statistical analysis
1.3 Scope of Research
a To do literature study on carburizing process and fracture mechanics
b To carry out carburizing treatment at different time and temperature
setting on low carbon steel c
To carry out fracture toughness test on the material using bend specimen, before and after treatments
d Surface characterization of every specimen.
e To compare the data using statistical analysis
1.4 Problem Statement
Cracks are difficult to avoid and occur more frequently than we might at first think. The present of crack in a component or machine, vehicle or structure may
weaken it so that it fails by fracturing into two or more pieces. The study of fracture toughness and the mechanical properties of low carbon steel are very important to
understand the behavior of the steel. With that, the analysis done can be used to avoid any accident in designing. Hence, in this research, the effect of time and
temperature variation on fracture properties of carburized low carbon steel AISI 1020 is studied.
1.5 Planning and execution for PSM Project
Figure 1.1 : Gant Chart for Planning and Execution for PSM 1 and 2
NAME: MUHD NURULHAFIZAN B.MAHAT MATRIX NO: B040410075
FINAL YEAR PROJECT TITLE: Time and Temperature Effects on Fracture Properties of Carburized Low Carbon Steel
PLANNING AND EXECUTION FOR PSM PSM 1
PSM 2 J
U L
A U G S E P T
J A N F E B
M A R A P R
RESEARCH ACTIVITYTIME 1
2 3
4 5
6 7
8 9
10 11
12 1
2 3
4 5
6 7
8 9
10 11
12 13
14 1.Literature review
2.Experimental activities:- Acutting of specimens
BSurface treatment process:- I. Uncarburized specimens
ii. Carburizing at 850°C for 3 hrs iii. Carburizing at 850°C for 6 hrs
iv. Carburizing at 900°C for 3 hrs v. Carburizing at 900°C for 6 hrs
C Mechanical testing via 3-point bending i.Uncarburized specimens
ii. Carburized specimens D Surface Analysis
Results and analysis Report writing for PSM
Preparation for PSM Seminar Submission of report log book
CHAPTER 2
LITERATURE REVIEW
2.1 Steel
