Difference between the inelasticity and plasticity of metals

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Discussion Overview

The discussion revolves around the differences and similarities between inelasticity and plasticity in metals, exploring whether these terms can be used interchangeably and the implications of their definitions. The scope includes conceptual clarifications and technical explanations related to material behavior under stress.

Discussion Character

  • Conceptual clarification
  • Debate/contested
  • Technical explanation

Main Points Raised

  • Some participants propose that inelasticity and plasticity can be used interchangeably, as plasticity is a major mechanism in metals.
  • Others argue that inelastic behavior encompasses additional phenomena such as fracture, void growth, and recrystallization, which may not be included in the definition of plasticity.
  • A participant expresses confusion regarding the terms fracture, void growth, and recrystallization, seeking clarification on whether a sharp distinction exists between inelasticity and plasticity.
  • One participant asserts that there is no sharp difference between inelasticity and plasticity.
  • Another participant describes inelastic strain as occurring when a load below the tensile strength is removed, while plastic strain occurs when the tensile strength is exceeded, resulting in visible deformation.
  • A later reply expresses gratitude for the clarity of the explanation provided regarding inelastic and plastic strain.
  • A participant introduces a new topic by asking about inelastic liquids, indicating interest in related material behavior.

Areas of Agreement / Disagreement

Participants do not reach a consensus on whether inelasticity and plasticity can be considered interchangeable, with multiple competing views presented throughout the discussion.

Contextual Notes

The discussion reveals limitations in definitions and assumptions regarding inelasticity and plasticity, as well as the potential for misunderstanding related terms and concepts.

hariharan venkatasu
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TL;DR
I am confused between inelasticity and plasticity of metals. Is there a clear cut distinction between these two properties? To me both seem to be same. None of the internet articles give clear and convincing answer . Could you please clarify the difference? Thank you.
It is felt that inelasticity can be used interchangeably.
 
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Inelastic behavior contains plastic behavior, so they are often used interchangeably since plasticity is the major mechanism in metals. Inelastic behavior also contains other phenomena (fracture, void growth, recrystallization, …)
 
I did not understand what you mean by fracture ,void growth,recrystallization etc. Actually my question is whether is there a sharp difference between inelasticity and plasticity ?.
 
hariharan venkatasu said:
Actually my question is whether is there a sharp difference between inelasticity and plasticity?
No.
 
Thank you very much for the answer
 
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I was taught inelastic/plastic strain.
Inelastic strain occurs when a load ( below the tensile strength ) is removed from a metal and permanent internal stresses at the grain boundaries remains.
Plastic strain occurs when the materials tensile strength has been exceeded with a load. This type of strain is visible by eye. The material has been stretched.
You can research Young's Modulus of Elasticity for more info on a materials plastic limit.
 
Extremely thankful to you. Your answer is very clear
 
Further I want to know what is inelastic liquids which I came across a few days ago
 

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