ISRO Mechanical & Aerospace 2013 - Question 74

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Work hardening strengthens an alloy by

  • A. Removing Internal defects in the crystal structure
  • B. Increasing the dislocation density
  • C. Decreasing the grain size of the alloy
  • D. Increasing the lattice resistance to dislocation motion

Answer: B. Increasing the dislocation density

Explanation: Work hardening increases dislocation density, causing entanglements that impede further slip.

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