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Question 30900
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Elasticity, Thermal Expansion, Calorimetry and Heat Transfer: Elasticity Advanced MCQ

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Elasticity AdvancedHardQuestion 30900

Question

In a stress-strain curve for a ductile metal, the region between yield point and ultimate tensile strength is called:
  1. A
    Elastic region
  2. B
    Fracture point
  3. C
    Plastic region (work-hardening region)
    Correct
  4. D
    Proportional region

Correct answer

Plastic region (work-hardening region)

Explanation

Beyond the yield point, permanent deformation occurs. The metal work-hardens until the ultimate tensile strength, after which necking and fracture occur.

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