Which outcome results when uneven rates during shrinkage occur during the sand casting of Song Dynasty iron agricultural tools?

💡 Explanation

Tensile stresses form during uneven cooling because differential thermal contraction exerts internal forces creating residual strain – called thermal stress because of the differences in grain structure and alloy content that emerge during solidification. Therefore, tensile stresses result rather than toughness increasing due to work hardening.

• When correcting observations for refraction using an astrolabe around 1000 AD, which consequence results from assuming a uniform atmosphere?
• Which risk increases when differential settling affects load-bearing ziggurat corners?
• Which long-term consequence occurred as the medieval Silk Road trade declined?
• Which consequence occurs when Roman siege engines surpass a fortification's crushing limit?
• Which outcome results when long qanats feeding Mughal gardens experience gradual sedimentation?
• Which outcome routinely affected Viking longships navigating North Atlantic waters when storms eroded protective sealant?