High Rotation Speed Friction Stir Welding for 2014 Aluminum Alloy Thin Sheets

2017 ◽  
Vol 26 (3) ◽  
pp. 1337-1345 ◽  
Author(s):  
Shujin Chen ◽  
Yang Zhou ◽  
Junrong Xue ◽  
Ruiyang Ni ◽  
Yue Guo ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Friction Stir Welding ◽  
Rotation Speed ◽  
Thin Sheets ◽  
Friction Stir ◽  
High Rotation Speed

Influence of Different Anvil Back Plates on Heat Dissipation Velocity of the Micro-Friction Stir Welding Process

2015 ◽  
Vol 786 ◽  
pp. 415-420 ◽  
Author(s):  
Wan Shun Chu ◽  
Farazila binti Yusof
Keyword(s):  
Aluminum Alloy ◽  
Friction Stir Welding ◽  
Heat Dissipation ◽  
Welding Process ◽  
Temperature Fields ◽  
Thin Sheets ◽  
Friction Stir ◽  
Conventional Steel ◽  
Back Plate ◽  
Two Temperature

The objective of this study is to investigate effects of different anvil back plates on heat dissipation velocity of the micro-friction stir welding (micro-FSW or) process. For this purpose, temperature field simulations are conducted for the micro-friction stir welding of AA5083-H323 aluminum alloy thin sheets by using the ceramic anvil back plate and conventional steel anvil back plate, respectively. Comparing the obtained two temperature fields, it is found that the ceramic anvil back plate significantly decreases the heat dissipation velocity of the micro-FSW process.

scholarly journals Influences of Pin Shape on a High Rotation Speed Friction Stir Welding Joint of a 6061-T6 Aluminum Alloy Sheet

Metals ◽  
2018 ◽  
Vol 8 (12) ◽  
pp. 987 ◽  
Author(s):  
Yang Zhou ◽  
Shujin Chen ◽  
Jiayou Wang ◽  
Penghao Wang ◽  
Jingyu Xia
Keyword(s):  
Friction Stir Welding ◽  
Aluminium Alloy ◽  
Rotation Speed ◽  
Alloy Sheet ◽  
Aluminum Alloy Sheet ◽  
Welding Quality ◽  
Nugget Zone ◽  
Friction Stir ◽  
High Rotation Speed ◽  
S Curve

In order to explore the influences of different pins on the weld based on the specialty of the aluminium alloy sheet welding, three kinds of pins were chosen to perform high rotation speed friction stir welding on a 1 mm thick 6061-T6 aluminium alloy in this study. The microstructure and mechanical properties of the joints were analysed at the same time. When the rotation speed was 11,000 rpm and the welding speed was 300 mm/min, more sufficient stirring and a better joint (the tensile strength reaches 87.2% of the base metal) can be obtained with the pin design of a quadrangular frustum pyramid. The pattern of the weld cross section was a “flat T” and no obvious “S curve” was found in nugget zone (NZ). Heat affected zone (HAZ) and thermo-mechanically affected zone (TMAZ) were also narrow. The results demonstrate that the proportion of low angle boundaries in each area of the weld is lower than that of traditional Friction Stir Welding (FSW). The grain size of NZ is significantly refined and the proportion of low angle boundaries is only 20.1%, which have improved the welding quality.

scholarly journals Evaluation of Optimization Parameters of Semi-Solid Metal 6063 Aluminum Alloy from Friction Stir Welding Process Using Factorial Design Analysis

2020 ◽  
Vol 4 (4) ◽  
pp. 123
Author(s):  
Chaiyoot Meengam ◽  
Kittima Sillapasa
Keyword(s):  
Tensile Strength ◽  
Aluminum Alloy ◽  
Friction Stir Welding ◽  
Rotation Speed ◽  
Welding Process ◽  
Solid Metal ◽  
Stir Zone ◽  
Friction Stir ◽  
6063 Aluminum Alloy ◽  
Semi Solid

The semi-solid-metal 6063 aluminum alloy was developed for the automotive industry. The objective of this research was to optimize parameters in friction stir welding process that can provide the highest tensile strength. The ANOVA factorial design was used to analyze rotation speed, welding speed, and tool geometry at different factor levels of experimentation. The results showed that the optimized tensile strength was 120.7 MPa from the cylindrical tool, rotation speed was from 1300 to 2100 rpm, and welding speed less than 75 mm/min in the coefficient of determination R2 was 95.09%, as can be considered from the regression equation. The examination of the stir-zone and thermal mechanical affected zone using SEM and EDX showed that the new recrystallization of the microstructure causes fine grain in the stir-zone, coarse grain in advancing-side thermal mechanical affected zone, and equiaxed grain in the retracting-side thermal-mechanical affect zone. The intermetallic compounds of β-Al5FeSi phase transformation phase were formed to three types, i.e., β″-Al5Fe, Mg2Si, and Al8Fe2Si phase were observed. Moreover, in the stir-zone and thermal-mechanical-affected zone, defects were found such as flash defects, void or cavity defects, crack defects, lack of penetration defects, tunnel defects, kissing bond defects, and dendrite formation defects affecting weldability.

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