כיצד לחשב את Hall Petch
learn.whatIsHeading
Hall-Petch strengthening: yield strength = σ₀ + k·d^(-1/2), where d is grain diameter; primary strengthening mechanism.
מדריך שלב אחר שלב
- 1Input material constants σ₀ and k
- 2Vary grain size
- 3Calculate predicted yield strength
Worked Examples
קלט
Steel: σ₀ = 50 MPa, k = 0.8 MPa√mm
תוצאה
1mm grains → 50.8 MPa, 0.01mm → 80 MPa strength increase
Common Mistakes to Avoid
- ✕Using wrong units for grain size
- ✕Applying beyond material's valid range
Frequently Asked Questions
Is Hall-Petch always linear?
Approximately yes; breaks down at very small grain sizes (<100 nm).
מוכן לחשב? נסה את מחשבון Hall Petch החינמי
נסה זאת בעצמך →