Role of strong focusability on the welding process

2007 ◽  
Vol 19 (4) ◽  
pp. 252-258 ◽  
Author(s):  
Jan Weberpals ◽  
Friedrich Dausinger ◽  
Gunther Göbel ◽  
Berndt Brenner
Keyword(s):  
Welding Process

The Effect of Stirring Tool Surface Condition on Wear Characteristics in Friction Stir Welding (FSW) Process

2021 ◽  
Vol 880 ◽  
pp. 57-62
Author(s):  
Normariah Che Maideen ◽  
Salina Budin ◽  
Koay Mei Hyie ◽  
Nor Azirah Mohd Fohimi
Keyword(s):  
Heat Treatment ◽  
Friction Stir Welding ◽  
Surface Condition ◽  
Welding Process ◽  
Wear Characteristics ◽  
Rotating Speed ◽  
Friction Stir ◽  
Ticn Coating ◽  
Tool Surface

Stirring tool is one of the important factor that contribute to the successful of Friction Stir Welding (FSW). Role of tool, is to heat the welding zone and stir the material along the process. Many studies have been conducted by other researchers to improve the performance of stirring tool. Similar to this work, it is aimed to investigate and analyze the effect of stirring tool surface condition on wear characteristics in friction stir welding process. Four tools have been fabricated with pre-determined surface condition. Tool 1: H13 without heat treatment and without coating. Tool 2: H13 with heat treatment only. Tool 3: H13 with TiCN coating only and Tool 4: H13 with heat treatment and with TiCN coating. Friction stir welding was performed to test and verify the performance of fabricated tools. Process parameter used are 1270 RPM for rotating speed while 218 mm/min for welding speed. From the result, Tool 4 performed better in terms of physical wear as well as wear rate.

Characterization of Surface Defects Associated with Flash Butt-Welded Pearlitic Rails and their Contribution to Overload and Fatigue Failures

2009 ◽  
Vol 83-86 ◽  
pp. 1262-1269 ◽  
Author(s):  
Mostafa Mousavizade ◽  
Hassan Farhangi
Keyword(s):  
Surface Defects ◽  
Weld Zone ◽  
Welding Process ◽  
Electrical Heating ◽  
Main Concern ◽  
Zone Formation ◽  
Butt Welding ◽  
Fatigue Failures

Generally about 80 percent of railway tracks are welded by flash-butt welding that consists of electrical heating and hydraulic forging. Fracture of rails specially weld zone fractures are of main concern because of potential risk of a catastrophic derailment. In this paper, surface defects associated with flash butt welding process are examined. Metallographic and fractographic studies show various defects can be formed at the surface of weld zone. Formation mechanism of these defects and their contribution to the observed fatigue and overload weld failures are discussed. Fracture mechanics is also utilized to clarify the role of these defects in fatigue and overload failures.

Evaluation of the Role of Eddy Current in Resistance Spot Welding

2009 ◽  
Vol 131 (6) ◽  
Author(s):  
M. Abu-Aesh ◽  
Moataza Hindy
Keyword(s):  
Eddy Current ◽  
Resistance Spot Welding ◽  
Spot Welding ◽  
Welding Process ◽  
Welding Current ◽  
Work Piece ◽  
Resistance Spot ◽  
Precise Prediction ◽  
Welding Processes

Extensive work had been conducted on spot-welding due to its rapidly increasing industrial importance. The resistance spot-welding involves complicated phenomena, as several effects are found in the process, e.g., temperature, surface roughness, pressure, and eddy current effects. Most of the work exerted for analyzing the spot-welding process neglect the effect of the eddy current generated during the flow of the huge welding main current through the assembly of electrodes and work sheets. This work presents an analytical method to investigate the generation of eddy current and to determine the total effective welding current in spot-welding. The current distribution on the work sheet when it is fed by a conducting electrode is also investigated. The obtained current formula is based on electromagnetic principles, where a very strong magnetic field is generated in the core of the electrodes as well as in the materials of work sheets due to the flow of very high amperage. The final resultant effective current is the superposition of the electrode welding current and the induced eddy current in the electrode and work piece assembly. The results offer a viable mathematical model, which can be applied for a precise prediction of the effective value of welding current in spot-welding processes, if applied in a comprehensive model including all involved effects.

The Role of Friction Stir Welding Process Parameter on Mechanical Properties of Magnesium Alloy AZ31B

2013 ◽  
Vol 849 ◽  
pp. 38-44
Author(s):  
S. Vijayan ◽  
S. Prasath
Keyword(s):  
Mechanical Properties ◽  
Friction Stir Welding ◽  
Microstructure Evolution ◽  
Welding Process ◽  
High Strength ◽  
Fusion Welding ◽  
Friction Stir ◽  
Current State ◽  
Magnesium Alloy Az31b

The Friction Stir welding is a solid state welding invented in the year 1991.This welding technique is highly energy efficient, eco-friendly in joining the high strength aerospace aluminums alloys and its other alloys which are not able to weld by the conventional fusion welding process. Initially FSW is use to weld aluminums alloys and gradually it applies to all form of metals and alloys. In this review article the current state of understanding and development of FSW with respect to Magnesium alloys AZ 31 B is addressed. And particular emphasis is given to the effect of FSW process parameters on the mechanical properties, corrosion behavior and microstructure evolution. At this stage there is wide gap in understanding the mechanism of dissimilar Magnesium welds on microstructure evolution and microstructure property relationships with respect to FSW and Submersible FSW process.

Role of heat equation in lap joint for welding process

2017 ◽  
Author(s):  
P. Kumar ◽  
Rohit ◽  
Sooraj
Keyword(s):  
Heat Equation ◽  
Welding Process ◽  
Lap Joint
Sign in / Sign up

Export Citation Format

Share Document