scholarly journals Influence of Process Temperature on Hardness of Friction Stir Welded High Strength Aluminum Alloys for Aerospace Applications

Procedia CIRP ◽  
2014 ◽  
Vol 24 ◽  
pp. 120-124 ◽  
Author(s):  
Sahin Suenger ◽  
Michael Kreissle ◽  
Markus Kahnert ◽  
Michael F. Zaeh
Keyword(s):  
Aluminum Alloys ◽  
High Strength ◽  
Process Temperature ◽  
Friction Stir ◽  
Aerospace Applications ◽  
High Strength Aluminum Alloys

scholarly journals Weldability of High Strength Aluminum Alloys by Friction Stir Welding

2000 ◽  
Vol 40 (Suppl) ◽  
pp. S15-S19 ◽  
Author(s):  
Kazuhiro Nakata ◽  
Young Gon Kim ◽  
Masao Ushio ◽  
Takenori Hashimoto ◽  
Shigetoshi Jyogan
Keyword(s):  
Friction Stir Welding ◽  
Aluminum Alloys ◽  
High Strength ◽  
Friction Stir ◽  
High Strength Aluminum Alloys

scholarly journals Microstructure and Mechanical Properties of Dissimilar Friction Stir Welded AA2024-T4/AA7075-T6 T-Butt Joints

Metals ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 128
Author(s):  
Mohamed M.Z. Ahmed ◽  
Mohamed M. El-Sayed Seleman ◽  
Zeinab A. Zidan ◽  
Rashad M. Ramadan ◽  
Sabbah Ataya ◽  
...  
Keyword(s):  
Aluminum Alloys ◽  
High Strength ◽  
Travel Speed ◽  
Nugget Zone ◽  
Butt Joints ◽  
Friction Stir ◽  
Aircraft Skin ◽  
Ebsd Technique ◽  
High Strength Aluminum Alloys ◽  
Electron Back Scattered Diffraction

Aircraft skin and stringer elements are typically fabricated from 2xxx and 7xxx series high strength aluminum alloys. A single friction stir welding (FSW) pass using a specially designed tool with shoulder/pin diameter ratio (D/d) of 3.20 is used to produce dissimilar T-butt welds between AA2024-T4 and AA7075-T6 aluminum alloys at a constant travel speed of 50 mm/min and different rotational speeds of 400, 600 and 800 rpm. The AA2024-T4 is the skin and the AA7075-T6 is the stringer. Sound joints are produced without macro defects in both the weld top surfaces and the joint corners at all rotational speeds used (400, 600, and 800 rpm). The hardness value of the nugget zone increases by increasing the rotational speed from 150 ± 4 Hv at 400 rpm to 167 ± 3 Hv at 600 rpm, while decreases to reach the as-received AA2024-T4 hardness value (132 ± 3 Hv) at 800 rpm. Joint efficiency along the skin exhibits higher values than that along the stringer. Four morphologies of precipitates were detected in the stir zone (SZ); irregular, almost-spherical, spherical and rod-like. Investigations by electron back scattered diffraction (EBSD) technique showed significant grain refinement in the sir zone of the T-welds compared with the as-received aluminum alloys at 600 rpm due to dynamic recrystallization. The grain size reduction percentages reach 85 and 90 % for AA2024 and AA7075 regions in the mixed zone, respectively. Fracture surfaces along the skin and stringer of T-welds indicate that the joints failed through mixed modes of fracture.

Enhancing the high cycle fatigue life of high strength aluminum alloys for aerospace applications

2018 ◽  
Vol 42 (3) ◽  
pp. 698-709 ◽  
Author(s):  
Lingamaneni Rama Krishna ◽  
Yarlagadda Madhavi ◽  
Thatipamula Sahithi ◽  
Dameracharla Srinivasa Rao ◽  
Vijaykumar Sharanappa Ijeri ◽  
...  
Keyword(s):  
Fatigue Life ◽  
Aluminum Alloys ◽  
High Cycle Fatigue ◽  
High Strength ◽  
Cycle Fatigue ◽  
Aerospace Applications ◽  
High Strength Aluminum Alloys
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