What's the meaning of strength?

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SUMMARY

The discussion centers on the relationship between hardness and brittleness in materials, specifically referencing martensite. It is established that hard materials, while requiring significant force to deform, exhibit low flexibility, leading to a higher likelihood of breakage under stress. The yield strength of brittle substances is often close to their breaking strength, which explains their tendency to fail easily despite being hard. The conversation emphasizes the importance of understanding these properties in material science.

PREREQUISITES
  • Understanding of material properties such as hardness and brittleness
  • Familiarity with yield strength and breaking strength concepts
  • Knowledge of martensite and its characteristics in metallurgy
  • Basic principles of stress and strain in materials
NEXT STEPS
  • Research the mechanical properties of martensite and its applications in engineering
  • Study the definitions and measurements of hardness in materials science
  • Explore the relationship between flexibility and impact resistance in materials
  • Learn about stress-strain curves and their significance in material failure analysis
USEFUL FOR

Material scientists, mechanical engineers, and students studying material properties will benefit from this discussion, particularly those interested in the interplay between hardness and brittleness in engineering applications.

rkatcosmos
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I am coming across definitions which says certain substances (like martensite) are hard but brittle. I can't understand the meaning.
Brittle substances have yield strength closer to breaking strength. If something breaks/fails easily then how can it be hard..?
Pls help me out with some numbers...
 
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It can be hard to compress the material - you need a large force for a tiny change in its shape/volume/...
 
the harder they are the less flex they have and they will break easier to a point. its like mounting something up completely solid. its harder but more likely to break things because it cannot absorb vibration or impact as good. it just takes the force. so a certain force will be lower on something with more flexibility. I think I kind of rambled. but it makes sense to me
 

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