scholarly journals Effect of quality control parameter variations on the fatigue performance of aluminum friction stir welded joints

2019 ◽  
Vol 118 ◽  
pp. 150-161 ◽  
Author(s):  
Shihui Guo ◽  
Luqman Shah ◽  
Rakesh Ranjan ◽  
Scott Walbridge ◽  
Adrian Gerlich
Keyword(s):  
Quality Control ◽  
Welded Joints ◽  
Control Parameter ◽  
Fatigue Performance ◽  
Friction Stir ◽  
Parameter Variations

Microstructure and fatigue performance of friction stir welded joints of 2A12‐T4 and 7075‐T6 dissimilar aluminum alloy

2020 ◽  
Vol 51 (8) ◽  
pp. 1148-1160
Author(s):  
D.F. Zhang ◽  
Q.Y. Tang ◽  
T.H. Wei ◽  
Y.H. Lin ◽  
X.W. Chen ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Welded Joints ◽  
Fatigue Performance ◽  
Friction Stir

Similar and Dissimilar FSWed Joints in Lightweight Alloys: Heating Distribution Assessment and IR Thermography Monitoring for On-Line Quality Control

2013 ◽  
Vol 554-557 ◽  
pp. 1055-1064 ◽  
Author(s):  
Archimede Forcellese ◽  
Milena Martarelli ◽  
Giuseppe Pandarese ◽  
Michela Simoncini
Keyword(s):  
Quality Control ◽  
Welded Joints ◽  
Ir Thermography ◽  
Friction Stir ◽  
Welding Line ◽  
Lightweight Alloys ◽  
On Line ◽  
Bottom Side ◽  
Non Destructive ◽  
Fsw Experiments

The heating distribution assessment on similar and dissimilar friction stir welded joints in AA6082 and AA5754 aluminium alloy sheets was investigated. The FSW experiments were carried out using constant rotational and welding speeds of 1500 rpm and 60 mm/min, respectively. Temperature was locally measured by means of K-type thermocouples inserted into thin grooves located on the bottom side of the sheets, in fixed positions, very close to the welding line. It was observed that the mechanical properties of joints are related to the heat distribution. In order to obtain a completely non intrusive temperature monitoring, that was able to follow the process dynamic, a non-contact measurement system based on infrared thermography was also developed. Such system, used for the experimental evaluation of temperature on the upper surface of the joints, is also able to detect the presence of flow defects with a non-destructive method, demonstrating its effectiveness as a diagnostic instrument for the on-line quality control of welded joints.

scholarly journals Impact of Variations in Test Method Parameters onIn VitroActivity of Surotomycin against Clostridium difficile and Surotomycin Quality Control Limits for Broth Microdilution and Agar Dilution Susceptibility Testing

2015 ◽  
Vol 54 (3) ◽  
pp. 749-753 ◽  
Author(s):  
Maria M. Traczewski ◽  
Jennifer Deane ◽  
Daniel Sahm ◽  
Steven D. Brown ◽  
Laurent Chesnel
Keyword(s):  
Quality Control ◽  
Clostridium Difficile ◽  
Calcium Concentration ◽  
Susceptibility Testing ◽  
Test Method ◽  
Test Parameter ◽  
Content Type ◽  
Parameter Variations ◽  
Agar Dilution ◽  
Control Limits

Test parameter variations were evaluated for their effects on surotomycin MICs. Calcium concentration was the only variable that influenced MICs; therefore, 50 μg/ml (standard for lipopeptide testing) is recommended. Quality control ranges forClostridium difficile(0.12 to 1 μg/ml) andEggerthella lenta(broth, 1 to 4 μg/ml; agar, 1 to 8 μg/ml) were approved by the Clinical and Laboratory Standards Institute based on these data.

scholarly journals Microstructure and Corrosion Behavior of the Friction Stir Welded Joints Made from Ultrafine Grained Aluminum

2017 ◽  
Vol 19 (7) ◽  
pp. 1600807 ◽  
Author(s):  
Marta Lipińska ◽  
Ewa Ura-Bińczyk ◽  
Lech Olejnik ◽  
Andrzej Rosochowski ◽  
Małgorzata Lewandowska
Keyword(s):  
Corrosion Behavior ◽  
Welded Joints ◽  
Friction Stir ◽  
Ultrafine Grained
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