Which consequence results when thermal gradients exceed creep limits in turbine disc alloys?

💡 Explanation

Fatigue crack propagation accelerates when thermal gradients stress alloy grain boundaries. This occurs because vacancies coalesce via grain boundary diffusion during the **Nabarro–Herring creep** mechanism. Therefore accelerated crack growth occurs, rather than decreased resonance as grain size grows at a slower rate.

• Which consequence results when rapid turbine shaft deceleration occurs?
• Which programming error amplifies inaccuracies in a Stewart platform?
• Which outcome occurs when pulse width modulation (PWM) fails in controlling fuel injector timing?
• Which risk increases significantly when inclusions disrupt the weld?
• What outcome occurs on a robotic assembly line that stops sending acknowledgement signals to its controlling PLC?
• Which consequence results when hydraulic servo valve deadband exists in an automatic milling machine?