Prediction of Yield Strength 1
Adopt simple law of mixtures approach:
Bainite and Martensite
- strength of pure annealed iron
- solid solution strengthening
- interstitial carbon strengthening
- lath size
- dislocations
e.g. Fe-3.5C-2.3Si-0.4Mn-0.004P-0.016S-0.23Mo-0.25Cu-0.035Mg wt.%, austempered 350oC
iron 219 MPa; carbon 244 MPa; ss 547 MPa;
plate size 92 MPa; dislocations 547 MPa
Overall strength 1352 MPa (fully bainitic)