Which outcome occurs when strain increases beyond yield strength in metal alloy undergoing welding?

💡 Explanation

When strain surpasses the yield strength, plastic deformation occurs because dislocations in the crystal structure move and accumulate at grain boundaries, obstructing further slip. Therefore dislocation pile-up results, rather than conductivity changes, corrosion potential shifts, or altering diffusion rates, which require different mechanisms like temperature gradients or electrochemical environment changes.

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