OCTOBER 19-20, 2012 - YMCA University of Science & Technology

Proceedings of the National Conference on
Trends and Advances in Mechanical Engineering,
YMCA University of Science & Technology, Faridabad, Haryana, Oct 19-20, 2012
2. Methodology and Experimentation
In the present work three levels were chosen for three parameters and two levels were chosen for one parameter.
The interaction effect between electrode diameter and wire diameter was studied.
TABLE 1.1: Process Parameters Level
Symbol Process Parameters Unit Level 1 Level 2 Level 3
A Electrode Diameter (mm) 2.4 1.6 ---
B Wire Diameter (mm) 1.8 2.6 2.9
C Welding Current (Amp) 100 115 130
D Argon Flow (Litre/min) 6 7 8
FIXED PARAMETERS: Gap between plates 2 mm, Bevel Angle= 45 o (Noise Factor) and Material of Job AISI
304 and Mild steel plates (3 mm).
The experiment layout was set up with L18 orthogonal array.in the layout 18 trial run and 4 process parameters
A, B, C and D and their Levels were presented in table 1.2
TABLE 1.2: Experimental Layout Using L18 Orthogonal Array
Trial No.
Process Parameters and their Levels
- A B C D
1 1 1 1 1
2 1 1 2 2
3 1 1 3 3
4 1 2 2 3
5 1 2 3 1
6 1 2 1 2
7 1 3 1 3
8 1 3 2 1
9 1 3 3 2
10 2 1 3 1
11 2 1 1 2
12 2 1 2 3
13 2 2 3 2
14 2 2 1 3
15 2 2 2 1
16 2 3 2 2
17 2 3 3 3
18 2 3 1 1
TABLE 1.3: Experimental Data for Hardness Measurements
(A)
(B)
(C)
(D)
Hardness
Expt.
No.
Electrode
Diameter
(mm.)
Wire
Diameter
(mm.)
Welding
Current (Amp.)
Argon Flow
(L/min.)
(V.H.N.)
1 2.4 1.8 100 6 257 259
2 2.4 1.8 115 7 383 390
3 2.4 1.8 130 8 254 248
4 2.4 2.6 100 6 238 244
5 2.4 2.6 115 7 212 206
6 2.4 2.6 130 8 238 244
7 2.4 2.9 100 7 198 198
8 2.4 2.9 115 8 204 212
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