What is the mechanism responsible for the incredible level of plastic deformation in materials with superplastic behavior? I - The movement of dis...
What is the mechanism responsible for the incredible level of plastic deformation in materials with superplastic behavior?
I - The movement of dislocations through the grain.
II - The limited movement of dislocations in smaller grains.
III - The accumulation of tension by the sliding and rotation of individual grains or aggregates of grains.
IV - The diffusion of grain boundaries.
a) Only I and II are correct.
b) Only II and III are correct.
c) Only III and IV are correct.
d) All statements are correct.
I - The movement of dislocations through the grain.
II - The limited movement of dislocations in smaller grains.
III - The accumulation of tension by the sliding and rotation of individual grains or aggregates of grains.
IV - The diffusion of grain boundaries.
a) Only I and II are correct.
b) Only II and III are correct.
c) Only III and IV are correct.
d) All statements are correct.
💡 1 Resposta
Ed 
A alternativa correta é a letra "c) Only III and IV are correct." O mecanismo responsável pelo nível incrível de deformação plástica em materiais com comportamento superplástico é a acumulação de tensão pelo deslizamento e rotação de grãos individuais ou agregados de grãos e a difusão das fronteiras de grãos. As alternativas I e II estão incorretas, pois o movimento de discordâncias através do grão e o movimento limitado de discordâncias em grãos menores não são mecanismos responsáveis pelo comportamento superplástico.
✏️ Responder
Para escrever sua resposta aqui, entre ou crie uma conta
Outros materiais
Compartilhar