Effect of Initial Microstructure on the Microstructural Evolution and Joint Efficiency of a WE43 Alloy during Friction Stir Welding

2013 ◽  
pp. 253-261 ◽  
Author(s):  
S. Palanivel ◽  
R.S. Mishra ◽  
B. Davis ◽  
R. DeLorme ◽  
K.J. Doherty ◽  
...  
Keyword(s):  
Friction Stir Welding ◽  
Microstructural Evolution ◽  
Initial Microstructure ◽  
Friction Stir ◽  
Joint Efficiency ◽  
We43 Alloy

Friction Stir Welding of the Aluminum Matrix Composite - A Literature Review

2015 ◽  
Vol 787 ◽  
pp. 669-673
Author(s):  
K. Reddi Prasad ◽  
Arumugam Mahamani
Keyword(s):  
Friction Stir Welding ◽  
Literature Review ◽  
Weight Ratio ◽  
Ex Situ ◽  
Aluminium Matrix ◽  
Matrix Composites ◽  
Aluminium Matrix Composites ◽  
Friction Stir ◽  
Joint Efficiency ◽  
Welding Processes

Aluminium matrix composites have received the attention of numerous researchers, because of its attractive properties like high strength, good thermal conductivity and more strength to weight ratio. Application of the conventional welding processes for aluminium matrix composites, facilitates the formation of undesirable phase at the welded region, which limits the wide spread application. The objective of this paper is to review the literatures belonging to the friction stir welding of the composites and explore the challenges associated to maximize joint efficiency. The major contribution of this paper is to study the issue of welding of ex-situ and in-situ composites, various process parameters, properties of joint and post weld heat treatment process to improve the joint efficiency. This literature review provides some research gaps in the friction stir welding of composites.

Effect of Strain Hardening on the Joint Efficiency of an Al-Mg-Sc-Zr Alloy Subjected to Friction Stir Welding

2014 ◽  
Vol 922 ◽  
pp. 463-468
Author(s):  
Sergey Malopheyev ◽  
Vladislav Kulitskiy ◽  
Sergey Mironov ◽  
Daria Zhemchuzhnikova ◽  
Rustam Kaibyshev
Keyword(s):  
Friction Stir Welding ◽  
Strain Hardening ◽  
Initial Conditions ◽  
Welding Process ◽  
Weld Strength ◽  
Friction Stir ◽  
Joint Efficiency ◽  
Cold Rolled ◽  
Cold Worked ◽  
Hot Rolled

The microstructure and mechanical properties of friction stir welded Al-5.4Mg-0.2Sc-0.1Zr alloy were studied. Defect-free welds were produced in hot extruded, hot rolled and cold rolled initial conditions. Friction stir welding led to the formation of ultrafine-grained structure in stir zone that contributes to overall strengthening. Coherent Al3(Sc,Zr) dispersoids retain partially during welding process that provides a joint efficiency close to 100% in the hot extruded and hot rolled materials. In the cold-rolled state the joint efficiency was found to be only 64%. The relatively low weld strength of the cold rolled material was attributed to the elimination of strain hardening due to the formation of recrystallized structure. It was shown that full strength weld can be achieved in semi-finished products of Al-Mg-Sc alloys in cold-worked and stabilized states being equal to H323 and H341 tempering by friction stir welding.

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