In Song Dynasty era cast iron cannon production, which consequence results when carbon content fluctuated significantly?

💡 Explanation

Higher or unevenly distributed carbon promotes brittle cementite regions because the Phase transformation mechanism limits ductility. Therefore, ductile fracture risk elevates, rather than creep resistance, because the material becomes impact sensitive at high carbon concentrations.

• Which risk increases concerning Roman-era Roman canal (Qanat) systems which allowed underground access?
• Which consequence occurs when thermal cycles act on pietra dura inlay?
• Which adjustment becomes necessary for maintaining accurate timekeeping, when using an astrolabe as a sundial across different latitudes?
• Which outcome resulted from Roman aqueduct masonry lacking pozzolanic mortar in seismic zones?
• Which outcome results when bloomery iron is not completely de-carburized before being cast?
• Which mechanism limited the maximum height of early Egyptian obelisks despite stable base design?