National Dental Examining Board of Canada (NDEB) Practice Exam

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Prepare for the National Dental Examining Board of Canada (NDEB) Test. Study with flashcards and multiple choice questions, each question offers hints and detailed explanations. Achieve success in your exam!

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Strain hardening a metal will reduce its ductility and increases its what?

Toughness
Elastic modulus
Malleability
Conductivity

The correct answer is: Elastic modulus

Strain hardening, also known as work hardening, is a process in which a metal is subjected to plastic deformation, leading to an increase in its strength and hardness. As a result, the metal becomes less ductile and more rigid. This means that it is less likely to bend or deform under stress, but it also means that it is more prone to breaking or cracking. Therefore, option B - increase in elastic modulus - is the correct answer. Option A - toughness - is incorrect because strain hardening does not increase the ability of a metal to resist fracture or deformation. Options C and D - malleability and conductivity - are also incorrect because both of these properties are reduced by strain hardening.