Work hardening process - Material Science

Q.  What is meant work hardening process?
- Published on 05 Aug 15

a. Ductile materials are deformed plastically at temperatures below crystalline temperatures which increases strength and hardness of the material
b. Ductile materials are deformed plastically at temperatures above crystalline temperatures which increases strength and hardness of the material
c. Ductile materials are deformed plastically at crystalline temperatures which increases strength and hardness of the material
d. None of the above

ANSWER: Ductile materials are deformed plastically at temperatures below crystalline temperatures which increases strength and hardness of the material

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    Discussion

  • sandip   -Posted on 21 Sep 16
    it is really very good thing that answers are with explanation so we can understand better its answers and it is very helpful to our study.
  • Sravanthi   -Posted on 06 Oct 15
    Ductile materials are deformed plastically at temperatures below crystalline temperatures increasing strength and hardness of the materials. This process is called as strain hardening or work hardening. Work hardening causes increase in corrosion and crack formation. They develop internal stresses, elastic distortion and crystal fragmentation.

    Beyond elastic limit, rate of strain hardening decreases and then becomes constant till fractures occur. This process is divided into three stages. In stage one, work hardening rate is constant. In second stage, work hardening rate increases due predominant action of dislocation and in stage three, the material continue to harden.

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