Basics of mechanical properties of metals

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Basics of mechanical properties of metals

• Jean-Philippe Chateau
• Ecole des Mines de Nancy
• Institut Jean Lamour

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Lectures

• Lattice deformation
• Macroscopic behaviour
• Influence of temperature and strain rate
• Thermal activation of glide
• Dynamic recovery and recrystallisation
• Creep
• Failiure

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Influence of temperature and strain rate1)
Thermal activation of glide
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Dynamic strain aging

• displacement of dislocations by jumps through a
  forest
• strain aging in dilute alloys
• solute atoms diffuse in the stress field of fixed
  dislocations
• exert a dragging force fdrag when the dislocation
  moves
• origin of the yield point in aged Fe-C steels
• fdrag increases with diffusion time
• dynamic strain aging
• sdrag increases with tw
• S S0 Sdrag

waiting time tw
flight time 0
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Influence of temperature and strain rate2)
Dynamic recovery and recrystallisation
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Influence of temperature and strain rate3)
Creep
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Cards of deformation mechanisms
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