During early Bronze Age Mesopotamian axe production, which metallurgical mechanism caused brittle fracture during repeated impacts?

💡 Explanation

During repeated impacts, such as chopping wood, work hardening occurs because deformation increases dislocation density, impeding slip and causing brittleness leading to fracture. Therefore, work hardening causes brittle fracture, rather than embrittlement, leaching or segregation, which occur through different environmental or processing routes.

• Which agricultural outcome occurred when pre-Columbian civilizations implemented terracing on sloped maize fields?
• Which consequence occurred during 18th-century celestial navigation when sextant mirror misalignment was undetected?
• Which function did the Saracen Arch, employed during Medieval Islamic astronomy observations, serve when aligning meridian sighting instruments?
• Which outcome arose from medieval Islamic astronomers refining Ptolemy's geocentric model using epicycles and deferents?
• Which error increased in 18th-century celestial navigation when inaccurate chronometers overestimated eastbound travel time during ocean voyages?
• Which limitation hinders accurate prayer time determination when using a medieval astrolabe for differing longitudes?