scholarly journals Influence of Laser Welding Aluminium Alloy on Mechanical Properties of Welded Joints

2013 ◽  
Vol 13 (4) ◽  
pp. 526-530 ◽  
Author(s):  
Miroslav Sahul ◽  
Milan Turňa ◽  
Jana Šugárová ◽  
Martin Sahul
Keyword(s):  
Mechanical Properties ◽  
Laser Welding ◽  
Aluminium Alloy ◽  
Welded Joints

Laser Welding of SSM Cast A356 Aluminium Alloy Processed with CSIR-Rheo Technology

2006 ◽  
Vol 116-117 ◽  
pp. 173-176 ◽  
Author(s):  
R. Akhter ◽  
L. Ivanchev ◽  
C. Van Rooyen ◽  
P. Kazadi ◽  
H.P. Burger
Keyword(s):  
Mechanical Properties ◽  
Laser Welding ◽  
Weld Metal ◽  
Aluminium Alloy ◽  
Nd:Yag Laser ◽  
Dendrite Structure ◽  
Weld Microstructure ◽  
Semi Solid ◽  
A356 Aluminium Alloy ◽  
Fine Dendrite

Samples of aluminium alloy A356 were manufactured by Semi Solid Metals HPDC technology, developed recently in CSIR-Pretoria. They were butt welded in as cast conditions using an Nd:YAG laser. The base metal and weld microstructure were presented. The effect of different heat treatments on microstructure and mechanical properties of the welds were investigated. It was found that the fine dendrite structure of the weld metal contributed for equalizing the mechanical properties of the joint.

Evaluation of Mechanical Properties of Friction Stir Welded Al 6351 Aluminium Alloy with Reinforcement Particles in the Weld Region

2014 ◽  
Vol 893 ◽  
pp. 361-364 ◽  
Author(s):  
P. Karthikeyan ◽  
K. Mahadevan
Keyword(s):  
Mechanical Properties ◽  
Aluminium Alloy ◽  
Welded Joints ◽  
Annealing Treatment ◽  
Test Results ◽  
Nugget Zone ◽  
Annealed Condition ◽  
Grain Coarsening ◽  
Friction Stir ◽  
Weld Region

Although friction stir welded joints of similar or dissimilar metals exhibit good mechanical properties, the nugget zone in the weld region usually shows a deviation in the properties from the rest of the region due to grain coarsening. The effect of grain coarsening at the nugget zone is further aggravated when the friction stir welded joints are subjected to annealing treatment resulting to a wide variation in the properties. In order to overcome the above problem, in the present study an attempt has been made to retard grain coarsening at the nugget zone by the addition of suitable ceramic particles in the nugget zone during welding. SiC particles of 12 microns size is added at the nugget zone in the weld region during friction stir welding of Al 6351 aluminium alloy. The test results reveal that the addition of reinforcement particles resulted in the improvement of uniformity of properties across the weld region both in the as-weld and in the annealed condition.

scholarly journals MECHANICAL PROPERTIES LASER WELDING AUTOMOTIVE STEEL SHEETS

2015 ◽  
Vol 21 (3) ◽  
pp. 195
Author(s):  
Anna Lišková ◽  
Mária Mihaliková ◽  
Lukáš Dragošek ◽  
Róbert Kočiško ◽  
Róbert Bidulský
Keyword(s):  
Mechanical Properties ◽  
Laser Welding ◽  
Welded Joints ◽  
Metallographic Analysis ◽  
Interstitial Free ◽  
Steel Sheets ◽  
Interstitial Free Steel ◽  
Thin Steel ◽  
Micro Alloyed Steel ◽  
Automotive Steel

<p>The experimental and theoretical investigation deals with laser welding of automotive thin steel sheets. As tested materials were used Interstitial Free Steel (IF) from type of Hight Strength Low Alloy (HSLA) and the second is S420 steel (Micro-Alloyed Steel). Changes of properties of these materials were carried out by static dynamic conditions. The structure of welded joints these two materials were investigated by metallographic analysis. Metallographic analysis confirmed the formation of favourable structure of weld metal and heat affected zone. Obtained results showed that by laser welding it is possible to create the high quality welded joints with positive mechanical properties on used in automotive industry.</p>

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