Ultrasonic spot welding of a clad 7075 aluminum alloy: Strength and fatigue life

2020 ◽  
Vol 141 ◽  
pp. 105869
Author(s):  
S.M.A.K. Mohammed ◽  
Y.D. Jaya ◽  
A. Albedah ◽  
X.Q. Jiang ◽  
D.Y. Li ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Fatigue Life ◽  
Spot Welding ◽  
7075 Aluminum Alloy ◽  
Alloy Strength

Enhancement of Fatigue Life of Self-Piercing Riveted Joints by Coining

Manufacturing ◽  
2002 ◽  
Author(s):  
Zheng Jin ◽  
P. K. Mallick
Keyword(s):  
Aluminum Alloy ◽  
Fatigue Life ◽  
Aluminum Alloys ◽  
Automotive Industry ◽  
Spot Welding ◽  
Sheet Thickness ◽  
Compressive Stresses ◽  
Riveted Joints ◽  
Life Enhancement ◽  
Fatigue Life Enhancement

Self-piercing riveting is receiving attention in the automotive industry as an alternative to spot welding for body panels and structures, especially if they are made of aluminum alloys. In this paper, we explore the possibility of enhancing fatigue life of self-piercing riveted joints in 5754-O aluminum alloy sheets. Different sheet thickness combinations are considered. Coining is found to increase fatigue life significantly for self-piercing riveted joints in thinner sheets. However, the fatigue life enhancement is found to be less significant if the sheet thickness is in the range of 3 mm. The enhancement of fatigue life is attributed to residual compressive stresses around the coined area.

Fatigue Behavior of Friction Spot Stir Welding with No-Keyhole of Aluminum Alloy

2014 ◽  
Vol 1052 ◽  
pp. 509-513 ◽  
Author(s):  
Xi Jing Wang ◽  
Xiao Long Wang ◽  
Zhong Ke Zhang ◽  
Lei Wang ◽  
Qing Shan Zhao ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Fatigue Life ◽  
Spot Welding ◽  
Fatigue Behavior ◽  
Fatigue Properties ◽  
Strengthening Phase ◽  
Friction Stir ◽  
Increasing Trend ◽  
Fracture Appearance ◽  
Welding Joints

The fatigue properties of refill friction stir welding joints of 6082-T6 aluminum alloy were completed based on the optimal process parameters. The expression of the fatigue life prediction were obtained in a certain range. The microstructure and fatigue fracture appearance of welding joints were observed and analyzed. And the microhardness of the joints were tested. The results showed that the fatigue crack initiated from the root of the joints between the lower and upper plate, that is the junction of HAZ and TMAZ, and then propagated to fracture along the boundary between the HAZ and the TMAZ. Strengthening phase which was formed of trace elements significantly affected the fatigue properties of spot welding joints. The fatigue life of spot welding joints along with stress intensity factors decrease showed an increasing trend. Fatigue life of spot welding joints emerge an increasing trend along with decreases of the load.

scholarly journals The Influence of Parameters Affecting Mechanical Properties and Microstructures of Semi-Solid-Metal 7075 Aluminum Alloy by Using Friction Stir Spot Welding

2018 ◽  
Vol 22 (3) ◽  
pp. 51-64 ◽  
Author(s):  
Siva Sitthipong ◽  
Prawit Towatana ◽  
Chaiyoot Meengam ◽  
Suppachai Chainarong ◽  
Prapas Muangjunburee
Keyword(s):  
Mechanical Properties ◽  
Aluminum Alloy ◽  
Spot Welding ◽  
Friction Stir Spot Welding ◽  
Solid Metal ◽  
7075 Aluminum Alloy ◽  
Friction Stir ◽  
Semi Solid

Effect of ultrasonic melt treatment on the tribological behavior of 7075 aluminum alloy

2020 ◽  
Vol 62 (12) ◽  
pp. 1243-1250
Author(s):  
Fahri Vatansever ◽  
Alpay Tamer Erturk ◽  
Erol Feyzullahoglu
Keyword(s):  
Aluminum Alloy ◽  
Tribological Behavior ◽  
7075 Aluminum Alloy ◽  
Melt Treatment ◽  
Ultrasonic Melt Treatment
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