THE EFFECT OF IMPACT AND CONTINUOUS SCRATCHES ON THE CORROSIVE WEAR BEHAVIOR OF FE-18-PERCENT-CR-5-PERCENT-NI ALLOY AND 304-STAINLESS-STEELFOR 2 GRAIN SIZES
Sk. Varma et Rr. Romero, THE EFFECT OF IMPACT AND CONTINUOUS SCRATCHES ON THE CORROSIVE WEAR BEHAVIOR OF FE-18-PERCENT-CR-5-PERCENT-NI ALLOY AND 304-STAINLESS-STEELFOR 2 GRAIN SIZES, Wear, 201(1-2), 1996, pp. 121-131
The transient current response (TCR) in Fe-18%Cr-S%Ni alloy (referred
to as the alloy from here on) and 304 stainless steel (SS) due to impa
ct and continuous scratching in an electrolyte has been studied using
scratch technique. The smaller grain size produces higher values of tr
ansient current due to the corrosive wear process in both materials. T
he additional factor affecting the TCR during continuous scratching is
the number of tracks developed by the stylus. The microstructural det
ails, e.g. twins, appear to affect the transient current values. The t
ransmission electron microscopy reveals the near surface (close to the
scratches) microstructures showing the presence of deformation twins
in 304 SS, while nonuniform distribution of dislocations give rise to
the dislocation cell structure in the alloy. The microstructural featu
res such as grain boundaries, isolated dislocations, cell and twin bou
ndaries have been related to the TCR generation in the alloy and the 3
04 SS.