Study of solid solution strengthening of alloying element with phase structure factors

Using the empirical electron theory of solids and molecules (EET), the phase structure factors, nAand nB, of the carbon-containing structural units with mass fraction of carbon (WC) below 0.8% and the mono-alloy structural units with -wc at 0.2% in austenite and martensite are calculated. The solid solution strengthening brought by C-containing interstitial solid solution and alloy-substi-tutional solid solution in 7-Fe and a-Fe is discussed at electron structural level. The coefficient (s) of solid solution strengthening is advanced according to the bonding force between atoms. The study shows that when the criterion is applied to the carbonaceous or alloying element-containing solid solution the results of calculation will coincide with the experimental result very well.