Which outcome resulted from repeated quenching of a bronze celt (axe) during manufacture in Ancient Mesopotamia?

💡 Explanation

When bronze celts are repeatedly quenched, thermal shock causes rapid uneven cooling, resulting in the formation of micro-cracks, because the outer surfaces contract much faster than the core. Therefore crack formation reduces durability, rather than grain growth, carbon diffusion or work hardening which require different prolonged thermal and cyclical mechanical processes.

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