Titanium is one of the most important nonferrous metals, which finds extensive application in aerospace and chemical industries, because of its light weight, excellent corrosion resistance and high strength to weight ratio. Single pass gas tungsten arc (GTA) welding of thin sections of Ti–6Al–4V was accomplished with pulsing current technique and was found to be superior to conventional continuous current process in terms of grain refinement in the fusion zone. In this investigation, an attempt was made to study the effect of pulsed current GTA welding parameters on titanium alloy weld characteristics such as grain size and hardness. It was revealed that at an optimum value of 6 Hz pulse frequency and 80A peak current, the hardness was maximum and the grain size was minimum. Pulsing current in inert gas welding was found to be beneficial in titanium welding.

1.
Sundaresan
,
S.
,
Ram
,
G. D. J.
, and
Reddy
,
G. M.
, 1999, “
Microstructural Refinement of Weld Fusion Zones in Alpha-Beta Titanium Alloy Using Pulsed Current Welding
,”
Mater. Sci. Eng., A
0921-5093,
262
, pp.
88
100
.
2.
Prasad Rao
,
K.
, 2001, “
Fusion Zone Grain Refinement in GTA Welds Using Magnetic Arc Oscillation and Current Pulsing
,”
International Conference on Recent Advancement in Manufacturing Process (RAMP)
, pp.
176
196
.
3.
Gokhale
,
A. A.
,
Tzavaras
,
A. A.
,
Brody
,
H. D.
,
Ecer
,
G. M.
,
Abbaschian
,
G. J.
, and
David
,
S. A.
, 1983,
Grain Refinement in Castings and Welds
,
TMS-AIME
,
Warrendale, PA
, p.
223
.
4.
Madhusudhan Reddy
,
G.
,
Gokhale
,
A. A.
, and
Prasad Rao
,
K.
, 1998, “
Optimization of Pulse Frequency in Pulsed Current Gas Tungsten Arc Welding of Al-Lithium Alloy Steels
,”
Mater. Sci. Technol.
0267-0836,
14
, pp.
61
66
.
5.
Senthil Kumar
,
T.
,
Balasubramanian
,
V.
, and
Sanavullah
,
M. Y.
, 2005, “
Effect of Pulsed Current TIG Welding Parameters on Tensile Properties of AA6061 Aluminum Alloy
,”
IWS 2005
, pp.
29
39
.
6.
Balasubramanian
,
M.
,
Jayabalan
,
V.
, and
Balasubramanian
,
V.
, 2006, “
Optimizing the Pulsed Current Gas Tungsten Arc Welding Parameters
,”
J. Mater. Sci. Technol.
0861-9786,
22
(
06
), pp.
821
825
.
7.
Balasubramanian
,
M.
,
Jayabalan
,
V.
, and
Balasubramanian
,
V.
, 2008, “
A Mathematical Model to Predict Impact Toughness of Pulsed-Current Gas Tungsten Arc-Welded Titanium Alloy
,”
Int. J. Adv. Manuf. Technol.
0268-3768,
35
, pp.
852
858
.
8.
Hunter
,
W. H.
, and
Hunter
,
J. S.
, 1978,
Statistics for experimenters
,
Wiley
,
New York
.
9.
Montgomery
,
D. C.
,1991,
Design and Analysis of Experiments
,
3rd ed.
,
Wiley
,
New York
.
10.
Balasubramanian
,
M.
,
Jayabalan
,
V.
, and
Balasubramanian
,
V.
, 2007, “
Response Surface Approach to Optimize the Pulsed Current Gas Tungsten Arc Welding Parameters of Ti–6Al–4V Titanium Alloy
,”
Met. Mater. Int.
1598-9623,
13
(
4
), pp.
335
344
.
11.
Balasubramanian
,
M.
,
Jayabalan
,
V.
, and
Balasubramanian
,
V.
, 2008, “
Developing Mathematical Models to Predict Grain Size and Hardness of Argon Tungsten Pulse Current Arc Welded Titanium Alloy
,”
J. Mater. Process. Technol.
0924-0136,
196
, pp.
222
229
.
You do not currently have access to this content.