Podcast
Questions and Answers
What is creep in the context of material science?
What is creep in the context of material science?
- Temperature-dependent deformation under varying stress
- Non-deformation under any stress or temperature
- Time-dependent deformation under constant stress (correct)
- Stress-dependent deformation under constant temperature
At what temperature does creep become significant for a material?
At what temperature does creep become significant for a material?
- 0.4 Tm (correct)
- 0.6 Tm
- Tm
- 0.8 Tm
What renders a material useless in performing its intended function in the context of creep failure?
What renders a material useless in performing its intended function in the context of creep failure?
- Permanent dimensional change (correct)
- Temporary dimensional change
- Dimensional change only at higher temperatures
- No dimensional change
What can result from sufficient strain or creep in a material?
What can result from sufficient strain or creep in a material?
What is the creep mechanism that involves atomic diffusion and elongation of the grain in response to applied stress and temperature?
What is the creep mechanism that involves atomic diffusion and elongation of the grain in response to applied stress and temperature?
What happens to vacancies in the material’s microstructure during the creep mechanism involving atomic diffusion?
What happens to vacancies in the material’s microstructure during the creep mechanism involving atomic diffusion?
What is the main purpose of conducting a creep test?
What is the main purpose of conducting a creep test?
What is the significance of thermal activation of dislocations in the context of creep?
What is the significance of thermal activation of dislocations in the context of creep?
Why are turbine engine blades particularly susceptible to creep failure?
Why are turbine engine blades particularly susceptible to creep failure?
Which materials are susceptible to creep at relatively high temperatures according to the text?
Which materials are susceptible to creep at relatively high temperatures according to the text?
Why is it important to ensure quality material fabrication and processing in order to reduce material defects and voids?
Why is it important to ensure quality material fabrication and processing in order to reduce material defects and voids?
In which manner may creep failures appear according to the text?
In which manner may creep failures appear according to the text?
What do turbines, gas turbine engines, and ovens have in common according to the text?
What do turbines, gas turbine engines, and ovens have in common according to the text?
What is the role of grain boundaries in accommodating applied stress in materials experiencing creep?
What is the role of grain boundaries in accommodating applied stress in materials experiencing creep?
Why are materials with high melting temperatures often selected for turbine engine blades?
Why are materials with high melting temperatures often selected for turbine engine blades?
What is the purpose of plotting data from a creep test as strain vs. time?
What is the purpose of plotting data from a creep test as strain vs. time?
