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← ScienceWhich consequence weakens friction stir welds in aluminum?
A)Galvanic corrosion at grain boundaries✓
B)Formation of brittle intermetallic compounds
C)Ionic diffusion due to thermal gradients
D)Increased tungsten inert gas porosity
💡 Explanation
Galvanic corrosion weakens welds because a difference in electrochemical potential drives electron flow, causing corrosion rather than the formation of oxides that toughen the structure. Therefore, galvanic corrosion is the answer, as other phenomena require other compositions.
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