Continuous dynamic recrystallization during friction stir welding of high strength aluminum alloys

2000 ◽  
Vol 43 (8) ◽  
pp. 743-749 ◽  
Author(s):  
K.V. Jata ◽  
S.L. Semiatin
Keyword(s):  
Friction Stir Welding ◽  
Aluminum Alloys ◽  
Dynamic Recrystallization ◽  
High Strength ◽  
Friction Stir ◽  
Continuous Dynamic Recrystallization ◽  
Continuous Dynamic ◽  
High Strength Aluminum Alloys

scholarly journals Weldability of High Strength Aluminum Alloys by Friction Stir Welding

2000 ◽  
Vol 40 (Suppl) ◽  
pp. S15-S19 ◽  
Author(s):  
Kazuhiro Nakata ◽  
Young Gon Kim ◽  
Masao Ushio ◽  
Takenori Hashimoto ◽  
Shigetoshi Jyogan
Keyword(s):  
Friction Stir Welding ◽  
Aluminum Alloys ◽  
High Strength ◽  
Friction Stir ◽  
High Strength Aluminum Alloys

Microstructural Modelling for Friction Stir Welding of High Strength Aluminum Alloys

2012 ◽  
Vol 706-709 ◽  
pp. 1008-1013 ◽  
Author(s):  
J.D. Robson ◽  
L. Campbell
Keyword(s):  
High Temperature ◽  
Friction Stir Welding ◽  
Aluminum Alloys ◽  
Aluminium Alloys ◽  
High Strength ◽  
Grain Structure ◽  
Friction Stir ◽  
Severe Deformation ◽  
Microstructural Modelling ◽  
High Strength Aluminum Alloys

Friction stir welding is conceptually simple but metallurgically highly complex due to thecombination of severe deformation and high temperature. This is particularly true in the case ofprecipitation strengthened alloys, such as high strength aerospace aluminium alloys, where theheat and deformation of FSW lead to profound changes in both grain structure and precipitatedistribution that ultimately determine weld performance.

scholarly journals Microstructural Evolutions of 2N Grade Pure Al and 4N Grade High-Purity Al during Friction Stir Welding

Materials ◽  
2021 ◽  
Vol 14 (13) ◽  
pp. 3606
Author(s):  
Tomoya Nagira ◽  
Xiaochao Liu ◽  
Kohasaku Ushioda ◽  
Hidetoshi Fujii
Keyword(s):  
Friction Stir Welding ◽  
Dynamic Recrystallization ◽  
Grain Refinement ◽  
High Purity ◽  
Cube Texture ◽  
Grain Structure ◽  
Welding Temperature ◽  
Friction Stir ◽  
Continuous Dynamic Recrystallization ◽  
Dislocation Annihilation

The grain refinement mechanisms along the material flow path in pure and high-purity Al were examined, using the marker insert and tool stop action methods, during the rapid cooling friction stir welding using liquid CO2. In pure Al subjected to a low welding temperature of 0.56Tm (Tm: melting point), the resultant microstructure consisted of a mixture of equiaxed and elongated grains, including the subgrains. Discontinuous dynamic recrystallization (DDRX), continuous dynamic recrystallization (CDRX), and geometric dynamic recrystallization are the potential mechanisms of grain refinement. Increasing the welding temperature and Al purity encouraged dynamic recovery, including dislocation annihilation and rearrangement into subgrains, leading to the acceleration of CDRX and inhibition of DDRX. Both C- and B/-type shear textures were developed in microstructures consisting of equiaxed and elongated grains. In addition, DDRX via high-angle boundary bulging resulted in the development of the 45° rotated cube texture. The B/ shear texture was strengthened for the fine microstructure, where equiaxed recrystallized grains were fully developed through CDRX. In these cases, the texture is closely related to grain structure development.

Sign in / Sign up

Export Citation Format

Share Document