Abstract
Weak beam electron microscopy has been used to image a variety of faulted defects in a range of austenitic stainless steels. The observations have shown that the most reliable value of stacking-fault energy γ, can be obtained from measurements of the separation of partial dislocations in isolated dislocations. The values of stacking fault energy derived from extended nodes show a very large scatter and the significance of the different values of γ derived from the various faulted defects is discussed in terms of the influence of temperature on stacking fault energy and of solute impedance effects. The sensitivity of stacking fault energy of these stainless steels to Cr and Ni content is assessed.
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