Which microstructural change occurs in early bronze tools when repeatedly cold worked, such as hammering?

💡 Explanation

When bronze tools are repeatedly cold worked, dislocation density increases because plastic deformation introduces defects into the crystalline structure, increasing resistance to slip and thus raising hardness. Therefore, increased dislocation density results, rather than grain growth, phase segregation, or recrystallization each reliant on different thermomechanical processes.

• Which benefit directly arose from pre-Columbian chinampa agriculture in the valley of Mexico?
• Which structural challenge did Roman engineers primarily address when constructing large bathhouses with hypocaust heating systems?
• Which benefit did terrace construction specifically provide in ancient Andean maize agriculture?
• Which error is magnified when a 18th-century navigators' sextant mirror axis isn't perfectly perpendicular to the instrument's plane?
• Which mechanism maximized crop yields using ancient Inca terrace cultivation in mountainous Andean regions?
• Which risk increases when Bronze Age artisans repeatedly cold-work a bronze blade without annealing?