Excessive heat and centrifugal force on turbine blades is called what?

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Study for the Aviation Maintenance Technician, Second Class (AMT2) Exam. Use flashcards and multiple choice questions, with hints and explanations provided for each question. Prepare for success!

Multiple Choice

Excessive heat and centrifugal force on turbine blades is called what?

Explanation:
Excessive heat combined with the high centrifugal stress on turbine blades causes the blade material to slowly deform and increase in size—a phenomenon known as growth (creep). Metals at high temperatures under load will creep, meaning they elongate or change dimensions over time, which is exactly what this situation describes. This is different from wear (surface material loss from rubbing), erosion (material loss from particle impacts), or fatigue (crack formation from repeated stress cycles). So, growth is the best description because it captures the time-dependent dimensional change due to heat and sustained stress.

Excessive heat combined with the high centrifugal stress on turbine blades causes the blade material to slowly deform and increase in size—a phenomenon known as growth (creep). Metals at high temperatures under load will creep, meaning they elongate or change dimensions over time, which is exactly what this situation describes. This is different from wear (surface material loss from rubbing), erosion (material loss from particle impacts), or fatigue (crack formation from repeated stress cycles). So, growth is the best description because it captures the time-dependent dimensional change due to heat and sustained stress.

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