Which risk increases when a molten metal alloy solidifies within a casting mold but external cooling intensifies?

💡 Explanation

Macrosegregation increases because localized compositional variations redistribute as the metal cools and solidifies; this process, called constitutional segregation, causes solute-rich liquid to flow toward cooler regions. Therefore, alloys will exhibit non-uniform composition rather than homogeneous distribution because of uneven cooling during casting.

• Which mechanism prevents stall when a high angle-of-attack condition occurs?
• Which failure outcome in reinforced concrete elevated slabs results due to Alkali-Silica Reaction (ASR) combined with insufficient rebar cover?
• Which consequence results when sustained overload occurs exceeding a Ground Fault Circuit Interrupter (GFCI)'s rated current in a residential circuit?
• Which outcome occurs when reverse bias exceeds avalanche breakdown voltage in a tuned IMPATT diode?
• In an LED display, which outcome occurs when the drive current exceeds the rated forward current?
• Which processing error arises when the clock data-recovery circuit in a high-speed fiber-optic receiver fails, causing incorrect sampling of the received signal?