Retracted: “Effect of Pin and Shoulder Geometry on Stir Zone and Mechanical Properties of Friction Stir Spot-Welded Aluminum Alloy 2024-T3 Sheets” [ASME J. Eng. Mater. Technol. 2015; 137(3): pp. 031004–031004-6.; doi: 10.1115/1.4030197]

2015 ◽  
Vol 137 (3) ◽  
Keyword(s):  
Mechanical Properties ◽  
Aluminum Alloy ◽  
Stir Zone ◽  
Friction Stir ◽  
Aluminum Alloy 2024 ◽  
Shoulder Geometry ◽  
Spot Welded

scholarly journals Microstructural Characteristics and Mechanical Properties of Friction Stir Spot Welded 2A12-T4 Aluminum Alloy

2013 ◽  
Vol 2013 ◽  
pp. 1-10 ◽  
Author(s):  
Huijie Liu ◽  
Yunqiang Zhao ◽  
Xingye Su ◽  
Lilong Yu ◽  
Juncai Hou
Keyword(s):  
Mechanical Properties ◽  
Aluminum Alloy ◽  
Fracture Mode ◽  
Heat Input ◽  
Tensile Shear ◽  
Microstructural Characteristics ◽  
Friction Stir ◽  
Welding Heat Input ◽  
Mixed Fracture ◽  
Spot Welded

2A12-T4 aluminum alloy was friction stir spot welded, and the microstructural characteristics and mechanical properties of the joints were investigated. A softened microstructural region existed in the joint, and it consisted of stir zone (SZ), thermal mechanically affected zone (TMAZ), and heat affected zone (HAZ). The minimum hardness was located in TMAZ, and the average hardness value in SZ can be improved by appropriately increasing welding heat input. The area of complete bonding region at the interface increased with increasing welding heat input because more interface metals were mixed. In a certain range of FSSW parameters, the tensile shear failure load of the joint increased with increasing rotation speed, but it decreased with increasing plunge rate or decreasing shoulder plunging depth. Two kinds of failure modes, that is, shear fracture mode and tensile-shear mixed fracture mode, can be observed in the tensile shear tests, and the joint that failed in the tensile-shear mixed fracture mode possessed a high carrying capability.

Effect of Enhanced Cooling on the Microstructure and Mechanical Properties of Friction Stir Spot-Welded AZ31 Magnesium Alloy

2016 ◽  
Vol 850 ◽  
pp. 784-789
Author(s):  
Song Lin Chen ◽  
Da Tong Zhang
Keyword(s):  
Mechanical Properties ◽  
Magnesium Alloy ◽  
Cooling Water ◽  
Stir Zone ◽  
Az31 Magnesium Alloy ◽  
Air Cooling ◽  
Friction Stir ◽  
Microstructure And Mechanical Properties ◽  
Average Grain Size ◽  
Spot Welded

AZ31 magnesium alloy was friction stir spot welded in air and cooling in water. The effect of the enhanced cooling rate on the microstructure and mechanical properties of the joint was analyzed. The results showed that flowing water had obvious cooling effect instantaneously, which significantly restrained the growth of dynamic recrystallized grains. The average grain size in stir zone was 1.3μm in cooling water condition, which is far smaller than that of the joint prepared in air cooling condition. Under the condition of enhanced cooling, the microhardness in stir zone significantly increased, the ultimate tensile load (~ 3.99kN) increased by 15.7%, and the tensile deformation value (~ 3.65 mm) increased by 62.2%. Dimples in SEM fracture morphologies indicated the better plastic deformation capacity of joints prepared by cooling water, which failed through a mixture mode of ductile and brittle fracture.

Effect of Steel shot peening Time on some Mechanical Properties of Friction stir Welds for Aluminum Alloy (2024 – T3)

2020 ◽  
Vol 27 (4) ◽  
pp. 58-69
Author(s):  
Ghazwan Shihab ◽  
Adel Al-Bash
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Aluminum Alloy ◽  
Shot Peening ◽  
Mechanical Tests ◽  
Friction Stir ◽  
Compressive Stresses ◽  
Surface Annealing ◽  
Aluminum Alloy 2024 ◽  
Steel Balls

The aim of this work is to study the effect of the time of shot peening 3mm diameter steel balls on the mechanical properties of (2024 - T3) aluminum alloy butt welds. The welds were joined using Friction stir welding method. Mechanical tests) Tensile strength, hardness, fatigue strength( were performed on welded joints to determine the variation of these properties. The experimental results of SP time, 5 and 10 minutes give an improvement in mechanical properties. It was found that the longer the time of shot peening the mechanical properties are increased to a certain extent than the effect begins whereas when shot peening time at 15 min the mechanical properties decrease due to the concentration of stresses and surface annealing. Results show that the best mechanical properties of the welded zone were obtained at 10 minutes shot time due to the high compressive stresses generated by shot peening.

Microstructures and Mechanical Properties of Friction Stir Spot Welded Aluminum Alloy AA2014

2012 ◽  
Vol 22 (1) ◽  
pp. 71-84 ◽  
Author(s):  
S. Babu ◽  
V. S. Sankar ◽  
G. D. Janaki Ram ◽  
P. V. Venkitakrishnan ◽  
G. Madhusudhan Reddy ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Aluminum Alloy ◽  
Friction Stir ◽  
Microstructures And Mechanical Properties ◽  
Spot Welded
Sign in / Sign up

Export Citation Format

Share Document