Stacking fault energies

Alternatively, the effects of valency may be felt through the decrease in stacking fault energy (SFE) of fee alloys having increasing electron to atom ratio (14). 

Ffom a theoretical point of view, stacking fault energies in metals have been reliably calculated from first-principles with different electronic structure methods [4, 5, 6]. For random alloys, the Layer Korringa Kohn Rostoker method in combination with the coherent potential approximation [7] (LKKR-CPA), was shown to be reliable in the prediction of SFE in fcc-based solid solution [8, 9]. 

Rosengaard and Skriver [5] have demonstrated, that in all 3d, 4d, and 5d transition metals, the intrinsic stacking fault energy, 7, can be accurately estimated from the relation,... 

Figure 1 Intrinsic stacking fault energy for chemically disordered solid solution Al-X (where X=Cu or Mg) as a function of composition.

Figure 2 Comparison between intrinsic stacking fault energy (solid line) with two times the energy difference between the hep and the fee structure (dashed line) for Al-Cu (left panel) and Al-Mg (right panel) solid solution as a function of alloy composition.

Figure 3 Compositional dependence of the stacking fault energy calculated from the rigid-band model (solid line) compared with the more accurate results from the LKKR-CPA calculation (dashed line) for the Al-Cu alloy system.

However, whilst the effects of change in alloy composition upon stress-corrosion cracking susceptibility in the present context may be partly due to their effect upon stacking-fault energy, this does not constitute a complete explanation, since alloying may have significant effects upon electrochemical parameters. The effect of the zinc content of brasses upon their filming characteristics has already been mentioned, while in more recent... 

Stack-and-draw process, 22 444 Stack cooling, PAFC, 12 218 Stacking fault energy (SFE), 13 486 Stacking fault interactions, 13 498-499 Staebler-Wronski (SW) effect, 23 42 in hydrogenated amorphous silicon, 22 139... 

Magnetic effects on stacking fault energy. As the width of a stacking ffiult in... 

---