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Fatigue Life Improvement and Mitigation of Pitting Corrosion Damage of Friction Stir Welded 2219-T8751 Aluminum Alloy by Low Plasticity Burnishing

From Lambda Technologies
 

 

Friction stir welding (FSW) is a new solid state joining process for aluminum alloys including those alloys considered not weldable. However, the FSW process produces zones of tensile residual stress at the edges of the stir zone. Recent residual stress studies performed at Lambda Research on aluminum and titanium alloy FSW samples show tensile residual stresses throughout the weld thickness with maximum tension near the weld edges.

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Topics of Interest
Friction stir welding provides a new technology for solid state joining of a wide variety of aluminum alloys that cannot be joined with conventional fusion welds. However, recent work has shown that... (Read More)
Although friction stir welding (FSW) produces minimal distortion, residual stresses are created that impact fatigue and stress corrosion performance. X-ray diffraction residual stress and cold work... (Read More)
Low Plasticity Burnishing (LPB) has been investigated as a post-weld surface treatment to improve the corrosion fatigue performance of friction stir welded (FSW) AA2219 plate. Welds were fabricated... (Read More)
Friction stir welding (FSW) allows the joining of aluminum alloys in ways previously unattainable offering new manufacturing technology. Friction stir processing (FSP) of cast alloys such as Ni-Al... (Read More)
Mechanical suppression of corrosion fatigue and stress corrosion cracking (SCC) through low plasticity burnishing (LPB) has been demonstrated in several systems. LPB can be used to impart controlled... (Read More)
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