Study on weld bead surface profile and angular distortion in 6mm thick butt weld joints of SS304 using fiber laser

2014 ◽  
Vol 53 ◽  
pp. 152-157 ◽  
Author(s):  
P. Bhargava ◽  
C.P. Paul ◽  
G. Mundra ◽  
C.H. Premsingh ◽  
S.K. Mishra ◽  
...  
Keyword(s):  
Fiber Laser ◽  
Surface Profile ◽  
Weld Bead ◽  
Angular Distortion ◽  
Butt Weld ◽  
Weld Joints ◽  
Bead Surface

Effect of Pulse Currents on Weld Geometry and Angular Distortion in Pulsed GTAW of 304 Stainless Steel Butt Joint

2020 ◽  
Vol 17 (1) ◽  
pp. 7687-7694
Author(s):  
Agus Widyianto ◽  
Ario Sunar Baskoro ◽  
Gandjar Kiswanto
Keyword(s):  
Weld Bead ◽  
304 Stainless Steel ◽  
Angular Distortion ◽  
Bead Width ◽  
Butt Weld ◽  
Peak Current ◽  
Base Current ◽  
Weld Geometry ◽  
Pulsed Gtaw ◽  
Measuring Machine

In this research, the effect of pulse currents on the weld geometry and angular distortion in pulsed GTAW (PGTAW) process in 3 mm thick SS-304 autogenous butt weld joint was investigated. Welding method uses pulse current and continuous current. The mean current and welding speed were kept constant with the peak current and base current were varied. During pulsed GTAW process, the arc condition was captured directly using a charge-coupled device (CCD) camera. Weld geometry was carried out using a digital microscope. Distortion was measured using Coordinate Measuring Machine (CMM).  The results show that the peak current and base current have an influence on weld geometry and angular distortion. The weld geometry on pulsed GTAW was produced wider of weld bead width than continuous GTAW. However, angular distortion on continuous GTAW was higher than pulsed GTAW.  Pulsed GTAW can widen the weld bead by 0.57% - 25.09%, but can reduce distortion by 15.15%-88.17%. As compared with weld geometry to the continuous GTAW, the widest result occurs at peak current 212A and base current 40A. The smallest of distortion on pulsed GTAW was achieved at peak current 138A and base current 80A.

Residual Stress Evaluation In Austenitic Stainless Steel Butt Weld Joints By Ultrasonic Technique

1992 ◽  
Vol 25 (3) ◽  
pp. 130 ◽  
Author(s):  
P. Palanichamy ◽  
A. Joseph ◽  
K. V. Kasiviswanathan ◽  
D. K. Bhattacharya ◽  
Baldev Raj
Keyword(s):  
Residual Stress ◽  
Stainless Steel ◽  
Austenitic Stainless Steel ◽  
Ultrasonic Technique ◽  
Butt Weld ◽  
Stress Evaluation ◽  
Weld Joints

scholarly journals Forensic Engineering Investigation Of Failure Of An Oil Pipeline

2012 ◽  
Vol 29 (1) ◽  
Author(s):  
William R. Broz
Keyword(s):  
Contaminated Soil ◽  
Fuel Oil ◽  
Weld Repair ◽  
Butt Weld ◽  
Oil Pipeline ◽  
Weld Joints ◽  
General Contractor ◽  
Forensic Engineering ◽  
Engineering Investigation ◽  
Surrounding Soil

A Below-Grade, Nps 12 Pipeline Serving A Major Commercial Marine Terminal Failed At A Flanged Joint, Causing A Major Leak And Contamination Of The Surrounding Soil. The Gasket At The Failed Joint Showed Evidence Of Localized, Radial Through-Leakage. At The Terminal, The Initial Excavation Of Contaminated Soil Caused Minor Damage To Several Non-Leaking Segments Of Pipe And The Author Was First Tasked To Oversee The Related Inspection, Weld Repair And Corrosion Protection Work. The Author Subsequently Performed A Forensic Pipe Stress Analysis Of The Affected Portion Of The Fuel Oil System Per The Governing Pressure Piping Code. The Results Indicated That The Leaking Joint Failed With Respect To The Code Criterion Of Equivalent Pressure. Further Investigation Revealed That The System As Originally Designed Was Entirely Of Butt Weld Construction With No Flanged Joints, And Would Have Complied With All Code Requirements. The Investigation Determined That The General Contractor Had Made An Unauthorized Substitution Of Flanged Joints For Butt Weld Joints, Without Informing The Owner Or Design Engineer Of Record.

Eddy current impedance imaging in butt weld joints of AISI stainless steel plates

1992 ◽  
pp. 346-350
Author(s):  
B.P.C. Rao ◽  
M.T. Shyamsunder ◽  
C. Babu Rao ◽  
D.K. Bhattacharya ◽  
Baldev Raj
Keyword(s):  
Stainless Steel ◽  
Eddy Current ◽  
Steel Plates ◽  
Butt Weld ◽  
Impedance Imaging ◽  
Weld Joints

scholarly journals Mechanical and microstructure analysis of AA6061 and Ti6Al4V fiber laser butt weld

Optik ◽  
2017 ◽  
Vol 148 ◽  
pp. 151-156 ◽  
Author(s):  
Giuseppe Casalino ◽  
Sonia D’Ostuni ◽  
Pasquale Guglielmi ◽  
Paola Leo ◽  
Michelangelo Mortello ◽  
...  
Keyword(s):  
Fiber Laser ◽  
Microstructure Analysis ◽  
Butt Weld

Propagation Character of the Stress Wave in Weld Joints

2011 ◽  
Vol 199-200 ◽  
pp. 801-804 ◽  
Author(s):  
Hong Wei Song ◽  
Zhen Luo ◽  
San San Ao ◽  
Rui Wang
Keyword(s):  
Stress Wave ◽  
Large Scale ◽  
Low Cost ◽  
Dynamic Strain ◽  
Stress Wave Propagation ◽  
Long Distance ◽  
Test Technique ◽  
Butt Weld ◽  
Weld Joints ◽  
Before And After

Stress wave test technique has broad prospects because of the long distance, large scale and relatively low cost. This paper studies the stress wave propagation characteristics in the butt weld joints in the case of external symmetrical impact. The stress wave propagating before and after the joints is measured by dynamic strain gauge. Then model analysis and simulation is applied to research stress wave. The results show the loss of stress wave is small. After spectrum analysis, the change of propagating stress wave can be detected.

Welding of Austenitic Stainless Steel AISI 304 by Fiber Laser

2017 ◽  
Vol 891 ◽  
pp. 190-194
Author(s):  
Katarína Bártová ◽  
Mária Dománková ◽  
Jozef Bárta
Keyword(s):  
Fiber Laser ◽  
Welding Speed ◽  
Focal Point ◽  
Weld Bead ◽  
Bead Width ◽  
Statistical Software ◽  
Aisi 304 ◽  
Depth Measurement ◽  
Point Position ◽  
The Difference

Paper deals with the welding of AISI 304 thin sheets with the thickness of 1 mm by fiber laser. Statistical software MiniTab was used for planning the experiment. The influence of laser power, welding speed and focal point position on width and depth of weld bead was examined. Output power, welding speed and focus point position were used as variable factors for DOE. Samples were prepared by standard metallography. Weld bead width and depth were evaluated. Statistical results were afterward verified by welding reference samples with material the thickness of 0.25 mm. The difference between real width of weld bead and predicted width obtained from statistical software was 8.26 %. In case of weld depth measurement, the difference was 23 %.

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