ROLLING TEXTURE EVOLUTION OF Ag AND Ag-Zn ALLOYS HAVING VERY LOW STACKING FAULT ENERGIES

摘要

In order to clarify the differences in textural behaviors between low and very low stacking fault energy materials, the rolling texture developments of pure silver and Ag-Zn solid solution alloys containing 8 and 18 Zn in weight pct were investigated by means of the X-ray texture analysis including the reliable calculations of orientation distribution function as a function of rolling reduction in detail. The brass type rolling texture being dominated by {110}<112> component was developed with the minor component of {110}<001> at higher reductions of rolling(>90 pct) in all specimens of Ag and Ag-Zn alloys. However, it was found that the formation of {111}<011> type component at medium degrees of reduction(about 75 pct), which is characterized as a rolling texture component of very low stacking fault energy alloys, were enhanced with increasing contents of alloying elements of Zn. This characteristic feature appearing in the rolling texture of very low stacking fault energy alloys is discussed in terms of "the non-Wassermann effect" of deformation twinning.