Calculating Alloy Strength with Dispersed Particles: Expert Help Needed

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SUMMARY

The discussion focuses on calculating the new shear yield strength of an alloy after it has aged to an overaged condition, incorporating the strengthening contributions from dispersed particles. The initial parameters include a Burgers vector of 0.286 nm and a shear modulus of 80 GPa. The average center-to-center spacing of the particles is 275 nm, with an average particle diameter of 75 nm. Participants emphasize the complexity of estimating the initial yield strength due to factors such as component metals, grain size, and dislocation density.

PREREQUISITES
  • Understanding of alloy mechanics and yield strength
  • Familiarity with dislocation theory and Burgers vectors
  • Knowledge of shear modulus and its implications in material science
  • Experience with particle strengthening mechanisms in metallurgy
NEXT STEPS
  • Research the Hall-Petch relationship for grain size strengthening
  • Study the Orowan mechanism for particle strengthening in alloys
  • Learn about the effects of dislocation density on yield strength
  • Investigate the role of aging in alloy performance and properties
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Materials scientists, metallurgists, and engineering students focused on alloy development and strength optimization will benefit from this discussion.

maha1986
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Major stuck on a question for my assignment, totally wracked my brain and my mates too! here is the qtn

An alloy has an initial shear yield strength. After ageing to an overaged condition the matrix now contains particles where the average centre to centre spacing is 275nm. The average particle diameter is 75nm. Determine the new strength of the alloy taking into account the strengthing contribution from the disperesd particles.

Data

Burgers vector the dislocation= 0.286nm
shear modulas of the alloy 80GPa

We have worked out the addiitional strenght but can't seem to work out the initial to add it to the additional to work out the new!

Please please, anybody... help me
 
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If you don't know the alloy, you're not going to be able to estimate its initial yield strength (in the lack of any strengthening particles) with any precision. As you probably know, the yield strength of alloys depends on many things, including the component metals, the grain size, and the dislocation density.
 

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