Evaluation on Microstructures and Mechanical Properties in Friction Stir Welded Lap Joints of Invar 42/SS 400

2019 ◽  
Vol 19 (4) ◽  
pp. 2358-2361
Author(s):  
Kyung-Woo Kim ◽  
Kuk-Hyun Song
Keyword(s):  
Mechanical Properties ◽  
Lap Joints ◽  
Friction Stir ◽  
Microstructures And Mechanical Properties

Microstructures and mechanical properties of friction stir welded brass/steel dissimilar lap joints at various welding speeds

2016 ◽  
Vol 90 ◽  
pp. 1018-1025 ◽  
Author(s):  
Y. Gao ◽  
K. Nakata ◽  
K. Nagatsuka ◽  
T. Matsuyama ◽  
Y. Shibata ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Lap Joints ◽  
Friction Stir ◽  
Microstructures And Mechanical Properties

A study on the effect of cooling on microstructure and mechanical properties of friction stir-welded AA5086 aluminum butt and lap joints

2017 ◽  
Vol 233 (6) ◽  
pp. 1156-1165 ◽  
Author(s):  
Adel Sedaghati ◽  
Hamed Bouzary
Keyword(s):  
Mechanical Properties ◽  
Friction Stir Welding ◽  
Feed Rate ◽  
Rotational Speed ◽  
Lap Joints ◽  
Tensile Behavior ◽  
Water Cooling ◽  
Friction Stir ◽  
Microstructural Behavior ◽  
Constant Feed Rate

In this paper, the effect of water cooling on mechanical properties and microstructure of AA5086 aluminum joints during friction stir welding is investigated. For doing so, the mechanical and microstructural behavior of samples welded both in air and in water was analyzed. Tests were performed involving both butt and lap welds and the results were compared. The effect of rotational speed at constant feed rate of 50 mm/min and changing rotational speed ranging from 250 to 1250 r/min was investigated. The results showed a significant change in the tensile behavior of the butt-welded specimens due to water cooling. In addition, welding was performed at constant spindle speed of 800 r/min and various traverse speeds (25 mm/min to 80 mm/min) to determine the effect of feed rate. The strength increases at first, but then decreases dramatically along with the feed rate which is due to the occurrence of a groove defect. Results showed some generally positive impacts of water cooling which are discussed in terms of tensile results, hardness distributions and microstructure analysis.

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