Creep Mechanism

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  • what is creep deformation and under what general conditions it is likely to occur in metals and ceramics?
    • Creep is a slow, irreversible deformation that occurs at stress levels below yield strength.
    • Creep deformation occurs at >30% of melting temperature for metals and >40% of melting temperature for ceramics
    • Creep deformation accumulates over time
  • Describe what factors influence the extent and rate of creep in metals and ceramics?
    • material properties and microstructure, operating environment and applied stress
    • These combine to determine the dominant mechanism of creep
  • State and explain the four engineering design scenarios in which creep performance is


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